To see the other types of publications on this topic, follow the link: Landfill leachate.
Journal articles on the topic 'Landfill leachate'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 journal articles for your research on the topic 'Landfill leachate.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.
1
Warwick, SJ, P. Durany-Fernandez, DJ Sapsford, PJ Cleall, and MJ Harbottle. "Altered chemical evolution in landfill leachate post implementation of biodegradable waste diversion." Waste Management & Research: The Journal for a Sustainable Circular Economy 36, no. 9 (2018): 857–68. http://dx.doi.org/10.1177/0734242x18785723.
Full textAbstract:
Within the UK implementation of the European Union Landfill Directive (1999) has led to the diversion of biodegradable waste (BW) from municipal solid wastes away from landfills. It has been widely anticipated, but thus far not verified, that the diversion of BW and consequent reduction in BW reaching landfill would lead to a change in the degradation processes occurring within landfills and that this would be reflected in an altered evolution in leachate chemistry compared to pre-Directive landfills. This paper provides evidence based on leachate chemistry from two operational landfills together with calculations of the reduced BW content, that demonstrate the acetogenic phase that characterised pre-Directive landfill leachates is missing and is now more typical of methanogenic phase leachate. The paper demonstrates how data from national datasets and detailed landfill records can be used to constrain likely and upper estimates of the amount of BW going into post-Directive landfills, and the observed change in the evolution of leachate chemistry which has resulted from a decrease in BW content from typical values of BW (pre-Landfill Directive) of 22% to an inferred 12% in the case-study landfills. Data provided here add to the growing literature that estimates the amount of BW in recent post-Directive landfills which importantly allow the quantitative linkage between a decrease in landfilled BW and observed changes in leachate chemistry to be established such that future landfill operators can increase confidence in the effect of Directive implementation on landfill operational parameters.
2
Zloch, Jan, Magdalena Daria Vaverková, Dana Adamcová, et al. "Seasonal Changes and Toxic Potency of Landfill Leachate for White Mustard (Sinapis alba L.)." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 66, no. 1 (2018): 235–42. http://dx.doi.org/10.11118/actaun201866010235.
Full textAbstract:
Landfills are the most broadly used methods for the disposal of municipal solid waste (MSW). Leachate can be contaminated with pollutants that may pose a threat to the landfill surrounding namely soil, groundwater and surface waters.. Examination of leachate composition is determinative in long-term impact of landfills on the environment and human health. Moreover, it is essential to assess such prior knowledge for prevention of negative outcomes. The evaluation of the seasonal changes of landfill leachate and rainwater composition is presented in this paper. Research samples of leachate and rainwater were collected from February till June of 2017 (still ongoing) and analyzed for pH, electrical conductivity, dissolved oxygen, series of trace elements, Subsequently the test of leachate toxicity for higher plants (Sinapis alba L.) was carried out. Up to now, the results do not indicate significant seasonal difference in landfill leachate composition, however the toxicity tests provided on Sinapis alba L. demonstrate that landfill leachates can present a significant source of contamination. This research can serve practical tools for evaluating quality and risk assessment for landfill leachate.
3
Onay, T. T., and F. G. Pohland. "Nitrogen and sulfate attenuation in simulated landfill bioreactors." Water Science and Technology 44, no. 2-3 (2001): 367–72. http://dx.doi.org/10.2166/wst.2001.0791.
Full textAbstract:
The characteristics of leachate from landfills vary according to site-specific conditions. Leachates from old landfills are often rich in ammonia nitrogen, posing potential adverse environmental impacts in the case of uncontrolled discharge. At landfills where leachate recirculation is practiced, leachate ammonia concentrations may accumulate to higher levels than during the single pass leaching. Using leachate recirculation with system modifications, separate aerobic and anoxic zones for nitrification and both autotrophic and heterotrophic denitrification can be provided. Results from simulated landfill bioreactors indicated that both nitrogenous and sulfur compounds can be attenuated through autotrophic denitrification, and leachate nitrate concentrations of 750 mg/L reduced to less than 1 mg/L by denitrification to nitrogen gas promoting this very common process in a landfill environment results in the reduction of both leachate ammonia and sulfate concentrations.
4
Brkanac, Sandra Radić, Valerija Vujčić, Petra Cvjetko, Vid Baković, and Višnja Oreščanin. "Removal of landfill leachate toxicity and genotoxicity by two treatment methods." Archives of Industrial Hygiene and Toxicology 65, no. 1 (2014): 89–99. http://dx.doi.org/10.2478/10004-1254-65-2014-2431.
Full textAbstract:
Summary Leachates from active and closed municipal solid waste landfills can be a major source of contamination to groundwater and surface waters. In the present study the toxic and genotoxic potential of leachate from an old sanitary landfill prior to and following chemical and electrochemical treatments were assessed using Lemna, Allium, and comet tests. Photosynthetic pigments, malondialdehyde (indicator of lipid peroxidation) and antioxidant enzyme activities were evaluated as additional indicators of toxicity in duckweed. Following duckweed exposure to 25 % dilution of landfill leachate, growth rate and photosynthetic pigments content significantly decreased while lipid peroxidation increased despite stimulation of antioxidative defence mechanisms. Diluted leachate induced DNA strand breaks in duckweed cells as evidenced by the comet assay. Regarding the Allium test, untreated leachate caused inhibition of Allium cepa cell division and induction of mitotic and chromosomal aberrations. Although both water treatments completely reduced genotoxicity of leachate, the electrochemical method was found to be more efficient in removing toxic substances present in landfill leachate and thus more suitable for treating such leachates prior to their discharge into the environment. As landfill leachates pose a risk to human health and environment in general due to their (geno)toxicity, the present study demonstrates that the ecotoxicity/genotoxicity assays should be used in leachate risk assessment together with physicochemical analysis.
5
Calic, Natasa, and Mirjana Ristic. "Vinca landfill leachate characteristics prediction by the leaching method." Chemical Industry 60, no. 7-8 (2006): 171–75. http://dx.doi.org/10.2298/hemind0608171c.
Full textAbstract:
Under the newly implemented waste management policy in European Union countries, sanitary landfilling constitutes the fourth and the least preferred of the alternative management options for the disposal of solid urban wastes. Landfills generate emissions over long periods, often longer than a lifetime. The longest lasting emission is leachate: leachate production and management is now recognized as one of the greatest problems associated with the environmentally sound operation of sanitary landfills. These liquid wastes can cause considerable pollution problems by contacting the surrounding soil, ground or surface waters and, are therefore considered major pollution hazards unless precautionary measures are implemented. Landfill leachate characterization is a critical factor in establishing a corresponding effective management strategy or treatment process. This paper summarizes leachate quality indicators, and investigates the temporal variation of leachate quality from municipal solid waste. The toxicity of leachates from the municipal solid waste landfill "Vinca" in Belgrade, the capital of Serbia, was characterized using toxicity characteristics leaching procedures (TCLP). The "Vinca" landfill was established in 1978 as one of several municipal landfills. Since the 1990-ies the "Vinca" landfill has been the only operating landfill servicing the Belgrade Metropolitan area, the biggest city in Serbia, with 1,576,124 inhabitants in the larger-city area, and 1,273,651 inhabitants in the inner-city area. The total average amount of solid wastes deposited in the landfill is estimated to be 1100 tons/day. The landfill site is not lined and the tributary flows through the centre of the site-in some places directly under the mass of refuse. No consideration has been given to the protection of ground waters, surface runoff or drainage. Local authorities plan to expand the landfill by 0.4 km2 to a total of 1.3 km Chemical analysis was performed on the samples and the temporal variation of several parameters was monitored including pH, COD, chlorides, sulfates, nitrates, ammonia nitrogen, hardness, and heavy metals. The COD and pH were related to the biological activity within the landfill and the results indicated differences between the samples due to waste age. The concentrations of heavy metals, sulfates, nitrates, chlorides and ammonia nitrogen in the leachate were low, indicating their initially low amount in landfilled waste or their flushing with moisture contributing to a reduction in their concentrations.
6
Paxéus, N. "Organic compounds in municipal landfill leachates." Water Science and Technology 42, no. 7-8 (2000): 323–33. http://dx.doi.org/10.2166/wst.2000.0585.
Full textAbstract:
Leachates from three municipal landfills in the Göteborg area of western Sweden were characterised in terms of their content of individual organic compounds. Two of the investigated landfills were still in use during the time of this study. The third landfill was closed down in the mid-seventies. More than 200 individual organic compounds and classes of compounds were identified in the leachate with concentrations ranging from less than one up to several hundred μg/L. Among the compounds common to all three landfills were plasticizers (phthalates, benzenesulfonamides), phosphate esters, substituted phenols, chlorinated phenols, phenolic antioxidants and siloxanes as well as the compounds formed during the degradation of organic wastes (dihydro-dioxin, pyrazines and several sulphur-containing odorous volatiles). Dioxanes and dioxolans found in the leachates have not been previously reported. Compounds originated from previously disposed oil contaminated wastes dominate the leachate from an old closed landfill. Its replacement, a new regional landfill has a leachate dominated by alcohols and ethers. This difference is attributed to regional measures in waste management.
7
Wdowczyk, Aleksandra, and Agata Szymańska-Pulikowska. "Differences in the Composition of Leachate from Active and Non-Operational Municipal Waste Landfills in Poland." Water 12, no. 11 (2020): 3129. http://dx.doi.org/10.3390/w12113129.
Full textAbstract:
Leachate formation is one of the many environmental hazards associated with landfilling. The leachate may migrate from the landfill to surface water and groundwater, posing a potential threat to aquatic ecosystems. Moreover, its harmful effect on human health and life has been proven. Due to the risks that landfill leachates may pose, it is necessary to control the state of the environment in their surroundings. The paper presents an example of the application of selected statistical methods (basic statistics, statistical tests, principal component analysis) to assess the impact of individual pollution indicators on the quality of landfill leachates. The conducted analysis showed the existence of significant differences between the surveyed active (Legnica, Jawor) and non-operational (Wrocław, Bielawa) landfills in Poland. These differences were especially visible in the cases of the following: electric conductivity (EC) (non-operational landfills 1915–5075 μS/cm, active 5093–11,370 μS/cm), concentrations of total Kjeldahl nitrogen (TKN) (non-operational landfills 0.18–294.5 mg N/dm3, active 167.56–907.4 mg N/dm3), chemical oxygen demand (COD), organic nitrogen (ON), ammonium nitrogen (AN), total solids (TS), total dissolved solids (TDS), total suspended solids (TSS), sulfates, chlorides, sodium, potassium, calcium, magnesium and nickel. Selected indicators should help to determine the progress of decomposition processes inside the landfill and the potential impact of leachate on the environment, and should be used in the mandatory monitoring of landfills.
8
Wowkonowicz, Paweł, Marta Kijeńska, and Eugeniusz Koda. "Potential environmental risk assessment of di-2-ethylhexyl phthalate emissions from a municipal solid waste landfill leachate." PeerJ 9 (October 1, 2021): e12163. http://dx.doi.org/10.7717/peerj.12163.
Full textAbstract:
Background In certain countries, including Poland, polyvinyl chloride (PVC) waste, together with di-2-ethylhexyl phthalate (DEHP) contained within (up to 60%), is mostly directed to municipal solid waste (MSW) landfills. From there, over time, it is released from the polymer matrix and can migrate with landfill leachate into the environment. The amount of DEHP placed on the Polish market since the start of industrial production and the prevalent landfilling disposal of PVC waste in Poland, indicate that DEHP pollution can increase risk factors in the future. The objective of this study was to determine the concentrations of DEHP in leachates from a chosen MSW landfill directed to a local sewage treatment plant (STP) and estimate the associated potential risks to the environment. Results DEHP concentrations in leachates ranged from < LOQ to 394.4 µg/L, depending on the sampling year and season. DEHP is a pervasive environmental contaminant present in all investigated landfill leachate samples. The results from The European Union System for the Evaluation of Substances (EUSES) modelling related to DEHP in leachate directed to STP indicated potentially unacceptable risk to freshwater organisms; and birds and mammals feeding on earthworms (where a sewage sludge applications in agriculture take place). The results indicated low risk for other environmental components including local fresh-water sediment, local soil and microorganisms of STP, and freshwater fish-eating birds and mammals. Conclusions Future DEHP emissions may occur after the technical lifetime of the landfill and/or decay its bottom sealing. To avoid contamination, the monitoring of landfills after closure should include DEHP concentrations and last longer than the recommended (inter alia in Poland) 30 years, or until emissions from PVC to leachate are eliminated. More research on leachate of DEHP and its potential risks should be conducted, utilising detailed modelling which can including other landfills and different routes of DEHP emissions in leachates.
9
Amini Rad, Hasan, Moslem Salehi Ziri, and Leila Babaei. "Investigation of landfill leachate treatability for reuse in agricultural purposes." Water Practice and Technology 12, no. 1 (2017): 224–33. http://dx.doi.org/10.2166/wpt.2017.011.
Full textAbstract:
Leachates from landfills are one of the environmental challenges in developing countries, such as Iran that also will face water scarcity in the near future. Landfill leachate management to decrease the negative impact on water resources is indispensable. On the one hand, depending on the age of landfill, high ammonia concentration leachates could be a resource for use in agricultural purposes and on the other, treated leachate can be used as a valuable resource for agronomic irrigation. In order to investigate this hypothesis, landfill leachate was provided from the Sari municipal landfill in the north of Iran (COD = 7,045 mg/l; BOD5/COD = 0.36) and the performance of different combinations of biological, chemical and membrane processes were evaluated according to Iran's Agricultural Water Standard (IAWS). The treatment processes consisted of sequencing batch reactor (SBR), Fenton's process/SBR, and membrane/SBR/Fenton. Results indicated in addition to access IAWS, the treated leachate through Membrane/SBR/Fenton's process could be used as a nitrogen source for agricultural purposes. The removal efficiency of primary parameters, including COD, BOD5, turbidity, and color were 89%, 96%, 99% and 98%, respectively.
10
Dolhan, Mimi Malisa, Noor Farahin Bain, and Nur Shuhada Arbaan. "Penghilangan Logam Berat Dari Lindi Tempat Pembuangan Sampah Menggunakan Tanaman Akuatik." JURNAL ILMIAH AGRINECA 25, no. 1 (2025): 31–38. https://doi.org/10.36728/afp.v25i1.4371.
Full textAbstract:
Landfill leachate, a contaminated liquid produced from rainwater passing through waste materials, presents serious environmental risks by polluting soil and water sources. This study examines the potential of water spinach (WS) (Ipomoea aquatica), water hyacinth (WH) (Eichhornia crassipes), and marsh pennywort (MP) (Hydrocotyle umbellata) to remove heavy metals from landfill leachateIt evaluates levels of heavy metals such as zinc (Zn), copper (Cu), and iron (Fe) to assess the effectiveness of pollutant removal. Leachates from landfills were distributed among four basins over a period of 28 days; (Basin 1 – control, basin 2 – water hyacinth, basin 3 – water spinach, basin 4 – marsh pennywort) and each basin underwent testing with different retention times. The results proved substantial decrease in all of the selected heavy metals (Zn, Cu and Fe) levels after treatment with WH, WS and MP. All the aquatic plants demonstrate an ability to absorb heavy metals, leading to lowered concentrations in the leachate. These findings highlight WH, WS and MP promise as phytoremediation tools for managing landfill leachate contamination that can help to combat pollution and safeguard water resources. This project aims to compare how effectively WS, WH and MP, with various exposure times, can eliminate heavy metals.
11
Dzebisashvili, Natela, Sadhan K. Ghosh, and Darejan Dughashvili. "The Assessment of the Ecological State of Leachate from the Largest landfill of Georgia and Its Impact on Climate Change." Journal of Solid Waste Technology and Management 50, no. 4 (2024): 734–46. http://dx.doi.org/10.5276/jswtm/iswmaw/50s1/2024.734.
Full textAbstract:
Over the past decade the municipal solid waste management status in Georgia remained at the stage of mixed waste collection and disposal in landfills having negative impacts on entire ecosystem. It results the formation of large amounts of leachate, methane gas, potential resource depletion and is potential to health hazards. Landfill leads to groundwater contamination, soil & land pollution, harm to animals exposing to harmful materials & foods. Landfills are vulnerable to accidental fires due to the methane produced by decomposing organic waste, financial costs that can be expensive for municipalities or city councils and taxpayers. The aim of this study is to assess the adversee impact of leachate management technology on water resources, as well as on climate change. For utilisation of leachate in this research, the technology of distributing the collected leachate over the surface of the landfill is used. The main objectives include, the study of physical-chemical and microbiological parameters of leachate and the calculation of GHG (methane) emissions from sedimentation systems/tanks/reservoirs of leachate. Physical-chemical and microbiological analysis of leachate water indicates that the concentrations of organic, biogenic and microbiological parameters in research samples exceed limits of discharge by ten times. In this study, for the first time an index of water pollution and greenhouse gas emissions was calculated for leachate of the biggest landfill in Georgia. Leachates belong to class VII according to water pollution index. Emission of methane from leachate for 2024-year estimated as 5% additionally to total methane emissions from the studied landfill.
12
Sakač, Nikola, and Nikola Hrnčić. "Microplastics in landfill leachate - characteristics and common methods of identification." Environmental engineering 10, no. 1-2 (2024): 72–82. http://dx.doi.org/10.37023/ee.10.1-2.10.
Full textAbstract:
According to estimates, around 40 % of the world's plastic waste production is buried in landfills, which are still a widely used approach for waste disposal. Waste undergoes a number of physical, chemical, and biological changes after being landfilled, producing landfill leachate, a highly contaminated effluent. These complex physical, chemical, and biological processes that occur in landfills also cause plastics to break into smaller fragments called microplastics (MPs) which are accumulated in landfill leachate due to their small size. Depending on waste type, the degree of degradation, the climate, the characteristics of the landfill sites, socioeconomic factors, and the applied landfilling technology, leachate composition differs between landfills. Microplastics are now emerging particle anthropogenic contaminants, and their study is generating more and more attention from the scientific community and the general public. Even though landfills have taken steps to decrease the severity of this problem, MPs continue to be produced by plastics in both current and former landfills. In this way, humans and biota may be adversely affected by landfill leachate that has been released into the environment. In order to comprehend the patterns of microplastics degradation and the most typical forms of polymers that they contain, identification and characterization of MPs from landfills is highly required. These efforts will contribute to a better understanding of how MPs from landfills affect the environment.
13
Wdowczyk, Aleksandra, and Agata Szymańska-Pulikowska. "How to Choose Pollution Indicators for Monitoring Landfill Leachates." Proceedings 51, no. 1 (2020): 23. http://dx.doi.org/10.3390/proceedings2020051023.
Full textAbstract:
Leachates are one of the main factors polluting the ground and water environment in the vicinity of landfills. This is connected with the need to systematically control the elements of the environment that are exposed to the negative impact of landfill emissions. In Poland, the scope of landfill leachate quality monitoring includes 10 obligatory parameters (pollution indicators). The paper presents an example of the application of selected statistical methods (basic statistics, statistical tests, principal component analysis) to assess the impact of individual pollution indicators on the quality of landfill leachates. Four landfills from the area of Lower Silesia were selected for analyzes, for which in the years 2018–2019 tests of leachate properties were conducted in an extended scope (in relation to the scope applicable during monitoring). Analyses of the obtained results showed significant differences between landfills, depending mainly on their age and method of operation. Specific factors for assessing differences between landfills were as follows: electrolytic conductivity, chemical oxygen demand (COD(Cr)), organic nitrogen, ammonium nitrogen, chlorides and calcium. The values of some of the parameters included in the monitoring studies did not show variability, remaining below the limit of quantification. The conducted analyses permit the determination of the level of leachate contamination from selected landfills and the proposal of indicators that could complement the monitoring range of landfills for many years.
14
Pohland, F. G., and B. Al-Yousfi. "Design and operation of landfills for optimum stabilization and biogas production." Water Science and Technology 30, no. 12 (1994): 117–24. http://dx.doi.org/10.2166/wst.1994.0594.
Full textAbstract:
Most municipal landfills are constructed and operated with exposure to intermittent rainfall. Infiltration of rainfall, together with the inherent moisture content of landfilled wastes, promotes leachate production and accelerates rates of conversion of waste constituents. As these conversion processes proceed, waste stabilization occurs, leachate quality changes, and biogas is released in correspondence with the prevailing phase of stabilization. The intensities and temporal and spatial dimensions of these phases are waste-specific, a function of landfill design and operational strategy employed, and characterized by changes in physical, chemical and biological indicator parameters. Recognizing that most landfills exist as microbially mediated anaerobic waste conversion processes, with the sequential phases of acid formation and methane fermentation accounting for the majority of waste stabilization being accomplished, a fundamental understanding of these two principal phases of landfill stabilization is provided and used as a basis for developing guidance for controlled landfill design and operation. This guidance emphasizes optimization of stabilization efficiency, establishes cost-effective procedures for leachate management, and promotes regulated biogas production and utilization. To accommodate these objectives, the benefits of converting landfills into controlled bioreactor systems through regulated leachate generation, containment, collection, and in situ recirculation for accelerated waste stabilization and integrated biogas management are described, and opportunities for ultimate leachate disposal, biogas utilization and landfill reclamation are illustrated and compared to relative costs of other management options.
15
Zhang, Nan, Zhihao Zhang, Chunyang Li, et al. "Emerging Contaminants in Landfill Leachate and Groundwater: A Case Study of Hazardous Waste Landfill and Municipal Solid Waste Landfill in Northeastern China." Water 16, no. 18 (2024): 2575. http://dx.doi.org/10.3390/w16182575.
Full textAbstract:
Emerging contaminants (ECs) present a significant risk to both the ecological environment and human health. Landfill leachate (LL) often contains elevated EC levels, posing a potential risk to localized groundwater. This study aimed to characterize ECs in municipal solid waste landfills (MSWLs) and hazardous waste landfills (HWLs) in northeast (NE) China. One and three HWLs and MSWLs in NE China with varying types, operational years, and impermeable layers were selected as case studies, respectively. Statistical analysis of 62 indicators of nine ECs in leachate and the groundwater environment indicated the presence of perfluorinated compounds (PFCs), antibiotics, alkylphenols (APs), and bisphenol A (BPA). The leachates of the four landfills exhibited elevated concentrations of ECs of 21.03 μg/L, 40.04 μg/L, 14.54 μg/L, and 43.05 μg/L for PFCs, antibiotics, Aps, and BPA, respectively. There was a positive correlation between the highest concentrations of ECs in groundwater and those in leachate as well as with operational duration of the landfill; in contrast, groundwater EC was negatively correlated with the degree of impermeability. This study can guide future management of ECs in landfills and hazardous waste sites in China, particularly in NE China.
16
Emenike, Chijioke, Patricia Omo-Okoro, Agamuthu Pariatamby, Jayanthi Barasarathi, and Fauziah Shahul Hamid. "Remediation of Leachate-Metal-Contaminated Soil Using Selected Bacterial Consortia." Soil Systems 8, no. 1 (2024): 33. http://dx.doi.org/10.3390/soilsystems8010033.
Full textAbstract:
Approximately 95% of urban solid waste worldwide is disposed of in landfills. About 14 million metric tonnes of this municipal solid waste are disposed of in landfills every year in Malaysia, illustrating the importance of landfills. Landfill leachate is a liquid that is generated when precipitation percolates through waste disposed of in a landfill. High concentrations of heavy metal(loid)s, organic matter that has been dissolved and/or suspended, and inorganic substances, including phosphorus, ammonium, and sulphate, are present in landfill leachate. Globally, there is an urgent need for efficient remediation strategies for leachate-metal-contaminated soils. The present study expatiates on the physicochemical conditions and heavy metal(loid)s’ concentrations present in leachate samples obtained from four landfills in Malaysia, namely, Air Hitam Sanitary Landfill, Jeram Sanitary landfill, Bukit Beruntung landfill, and Taman Beringin Landfill, and explores bioaugmentation for the remediation of leachate-metal-contaminated soil. Leachate samples (replicates) were taken from all four landfills. Heavy metal(loids) in the collected leachate samples were quantified using inductively coupled plasma mass spectrometry. The microbial strains used for bioaugmentation were isolated from the soil sample collected from Taman Beringin Landfill. X-ray fluorescence spectrometry was used to analyze heavy metal(loid)s in the soil, prior to the isolation of microbes. The results of the present study show that the treatments inoculated with the isolated bacteria had greater potential for bioremediation than the control experiment. Of the nine isolated microbial strains, the treatment regimen involving only three strains (all Gram-positive bacteria) exhibited the highest removal efficiency for heavy metal(loid)s, as observed from most of the results. With regard to new findings, a significant outcome from the present study is that selectively blended microbial species are more effective in the remediation of leachate-metal-contaminated soil, in comparison to a treatment containing a higher number of microbial species and therefore increased diversity. Although the leachate and soil samples were collected from Malaysia, there is a global appeal for the bioremediation strategy applied in this study.
17
Kamal, Arailym, Ardak Makhatova, Bakzhan Yergali, et al. "Biological Treatment, Advanced Oxidation and Membrane Separation for Landfill Leachate Treatment: A Review." Sustainability 14, no. 21 (2022): 14427. http://dx.doi.org/10.3390/su142114427.
Full textAbstract:
Landfill leachate, especially when produced in old municipal solid waste landfills, is a challenging type of wastewater which contains a variety of toxic substances. The existence of pollutants in the landfill leachate is primarily due to inadequate solid waste separation at the source. Pretreatment on site is a must for the landfill leachate to be safely released into the environment. One-step treatment is insufficient since landfill leachate has a complex composition that spatially and temporally varies. Often, the landfill leachate and municipal wastewater are treated together. Biological treatment is a routine technique which is applied to landfill leachate less than five years old. The concentration of easily biodegradable organic matter in the young landfill leachate declines with time and, as a result, the application of physical and chemical treatment processes is required. The goal of the current work is to investigate the usefulness and capability of the most efficient and widely available technique/s for landfill leachate treatment, to identify the main challenges and strengths of each technology and seek the optimum solution.
18
van Praagh, Martijn, and Bettina Liebmann. "MICROPLASTICS IN LANDFILL LEACHATES IN THREE NORDIC COUNTRIES." Detritus, no. 17 (December 28, 2021): 58–70. http://dx.doi.org/10.31025/2611-4135/2021.15149.
Full textAbstract:
We investigated the occurrence of microplastics (size range 5,000-50 µm) in leachates at 11 landfills of different age and operational status in Finland, Iceland and Norway. Collective sampling was carried out by pumping leachate with a stainless-steel submergible pump through a custom-made, stainless-steel filter unit containing filter plates with decreasing pore sizes (5,000, 417 and 47 µm, respectively). Samples were pre-treated and split into particles size classes above 500 μm and above 50 μm, and screened for occurrence of microplastics made of PE, PP, PVC, PS, PET, PA, PU, PC, PMMA, POM, SBR (rubber) or PMB (polymer modified bitumen). Samples were analysed by FT-IR spectroscopy, both to identify and to count microplastic particles (SBR and PMB were merely identified). Most samples tested positive for multiple microplastics. Three leachates, including drinking water (blank), tested positive for SBR particles and/or PMB only. Treated leachate samples exhibited lower total microplastic’s counts than untreated, up to several orders of magnitude. National waste management practices over time, landfill age or operational status do not seem to explain differences in microplastic abundance or counts between leachates. Particle count and calculated loads of microplastic emissions through leachates differed several orders of magnitude between landfills. Results indicate that landfill leachates might be a relatively small source of microplastics (&gt;50 µm) to surface waters compared to untreated and treated sewage or road runoff. Continued data acquisition, improved sample preparation and understanding of variability of microplastics in landfill leachate are necessary, including particles smaller than 50 µm.
19
Obidoska, Grażyna, and Dorota Jasińska. "Phytotoxicity and potential genotoxicity of Radiowo municipal landfill leachate." Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation 40, no. 1 (2008): 39–44. http://dx.doi.org/10.2478/v10060-008-0035-0.
Full textAbstract:
Phytotoxicity and potential genotoxicity of Radiowo municipal landfill leachate Phytotoxicity and potential genotoxicity of Radiowo municipal landfill leachate. The most common method of municipal solid waste disposal is storing at landfills. Many hazardous substances are present in garbage and some more are formed during degradation. They may be assimilated by numerous organisms, pass through the food chain and bioaccumulate by long-term exposure in animals and humans. Therefore it seems an important tusk to monitor the toxic and genotoxic potential of municipal landfill leachates, which may contaminate waters and soils. Higher plants provide a very useful, uncomplicated and inexpensive tool for first-step screening of environmental pollutants. The objective of our study was to evaluate the phytotoxicity and potential genotoxicity of Radiowo municipal landfill leachate by the means of plant bioassays and to preliminary valuate the efficiency of zeolite as a leachate purifier. Phytotoxicity was assessed by the Allium cepa Root Elongation Bioassay and genotoxicity by the means of Allium and Vicia Root Tip Assays (RTA). Results were subjected to the F-test for the two way analysis of variance (ANOVA 2) and subsequently the Tukey's test, with statistical significance set at p = 0.05. Applied plant bioassays indicated significant phytotoxicity and potential genotoxicity of Radiowo landfill leachate The process of zeolite filtration did not eliminate, but evidently decreased phytotoxicity. It did not cause significant change in genotoxic potential of 100% leachate, but resulted in its more rapid decrease in a concentration dependent manner.
20
Naidoo, V., M. du Preez, T. Rakgotho, B. Odhav, and C. A. Buckley. "Toxicity and biodegradability of high strength/toxic organic liquid industrial effluents and hazardous landfill leachates." Water Science and Technology 46, no. 9 (2002): 163–69. http://dx.doi.org/10.2166/wst.2002.0230.
Full textAbstract:
Industrial effluents and leachates from hazardous landfill sites were tested for toxicity using the anaerobic toxicity assay. This test was done on several industrial effluents (brewery spent grain effluent, a chemical industry effluent, size effluent), and several hazardous landfill leachates giving vastly different toxicity results. The brewery effluent, spent grain effluent and size effluent were found to be less toxic than the chemical effluent and hazardous landfill leachate samples. The chemical industry effluent was found to be most toxic. Leachate samples from the H:h classified hazardous landfill site were found to be less toxic at high concentrations (40% (v/v)) while the H:H hazardous landfill leachate samples were found to be more toxic even at low concentrations of 4% (v/v). The 30 d biochemical methane potential tests revealed that the brewery effluent, organic spent grain effluent and size effluent were 89%, 63%, and 68% biodegradable, respectively. The leachate from Holfontein hazardous landfill site was least biodegradable (19%) while the chemical effluent and Aloes leachate were 29% and 32% biodegradable under anaerobic conditions.
21
Mai, Sofia, Elli Barampouti, Adamadios Koumalas, and Athanasios Dounavis. "Leachates From Landfill Sites In Thessaloniki, Greece: Effect Of Aging." Environmental Research, Engineering and Management 75, no. 4 (2019): 30–39. http://dx.doi.org/10.5755/j01.erem.75.4.23073.
Full textAbstract:
Sanitary landfilling still is one of the most common management systems of solid urban wastes. The persistent environmental impact of landfills depends on leachate characteristics. The present study aimed at the characterisation of leachate from two landfill sites in the prefecture of Thessaloniki, Greece. Mavrorachi landfill stands in our study as a representative Greek active landfill site, that started operating in 2008. Tagarades landfill has stopped receiving waste from 2008 after 27 years of full operation. In this investigation, leachate samples were physico-chemically characterised so as to assess their pollution potential and their concentration in regard to the type and age of landfill. Elevated concentrations of inorganic and organic constituents were observed in the leachate composition. COD ranged from 2,490 mg/L to 19,700 mg/L, while the respective range for BOD was 390-14,850 mg/L during a 35-year period. The pH values of the leachate samples presented more moderate fluctuations between 7.3 and 8.5. In addition, the ammoniacal nitrogen content increased as landfill age increased, whereas heavy metals concentrations showed significant variations with a slight decreasing trend. The results presented in this paper proved that as time passed, the values of most parameters decreased as the biodegradable compounds are broken down while the refractory compounds resist to biodegradation. Thus, the age has a pronounced influence on the composition of leachate. This study also focused on quantifying the level of contamination that leachates can be potentially cause on a comparative basis by Leachate Pollution Index (LPI). LPI values showed that pollution load was declining but is still not negligible after 33 years.
22
Gripa, Everton, Alyne M. Costa, Juacyara C. Campos, and Fabiana V. da Fonseca. "Ozonation Pretreatment for Reduction of Landfill Leachate Fouling on Membranes: A Response Surface Methodology Analysis." Processes 8, no. 5 (2020): 506. http://dx.doi.org/10.3390/pr8050506.
Full textAbstract:
Batch ozonation was performed to assess its efficacy as a pretreatment for reverse osmosis (RO) membranes for treating leachate with high concentrations of recalcitrant organic compounds. Leachate samples from two different landfills were collected and characterized. The modified fouling index (MFI) was used to estimate the fouling potential of raw and ozonized leachates. A response surface experimental design was applied to optimize operational pH and ozone dose. The results demonstrate that the best operational conditions are 1.5 g/L of O3 at pH 12.0 and 1.5 g/L of O3 at pH 9.0 for Landfills 1 and 2, which reduce MFI by 96.22% and 94.08%, respectively. Additionally, they show toxicity factor decays of 98.44% for Landfill 1 and 93.75% for Landfill 2. These results, along with the similar behavior shown by leachate samples from distinct landfills, suggest that ozonation is a promising technology to fit this kind of wastewater into the requirements of RO membranes, enabling their use in such treatment.
23
Bennett, Peter J., Frederick J. Longstaffe, and R. Kerry Rowe. "The stability of dolomite in landfill leachate-collection systems." Canadian Geotechnical Journal 37, no. 2 (2000): 371–78. http://dx.doi.org/10.1139/t99-110.
Full textAbstract:
This study uses several approaches to examine whether calcium-containing aggregate such as dolostone is a suitable drainage material for landfill leachate-collection systems. The thermodynamic stability of carbonate drainage materials has been assessed using published leachate data from landfills in the United Kingdom and leachate sampled from four large landfill sites of variable age in southern Ontario. Electron-microbeam techniques have been used to check for dissolution in dolomitic stone exhumed from the drainage layer of the Keele Valley Landfill leachate-collection system and from experiments that simulated landfill conditions. The mineralogy of cover soils applied daily to the landfill has been compared to the drainage stone and detrital material occluding pore space in the leachate-collection system to evaluate their relative contributions to clogging. The data suggest that dissolution of dolomitic drainage stone is not significant and contributes little to the clogging of landfill leachate-collection systems. However, crystallization of secondary calcite occurs about the dolomitic stones and sizeable quantities of inorganic fines, including dolomite, were present within some samples of "clog material" exhumed from the Keele Valley collection system. Most of the dolomitic fines probably were generated during construction of the collection system; such creation of fines ought to be minimized in future landfill developments.Key words: leachate-collection system, landfills, clogging, mineralogy, leachate chemistry.
24
Sheng, Hui, Yinbang Ren, Man Huang, Zhenying Zhang, and Jiwu Lan. "Vertical Expansion Stability of an Existing Landfill: A Case Study of a Landfill in Xi’an, China." Advances in Civil Engineering 2021 (July 7, 2021): 1–14. http://dx.doi.org/10.1155/2021/5574238.
Full textAbstract:
The vertical expansion of existing landfills can hold significant amounts of domestic waste and solve practical difficulties such as local government site selection. This research topic has become increasingly popular in the field of environmental geotechnical engineering. This study examined vertical expansion stability of landfills considering high leachate water level. The results showed the following. (1) Four slope instability modes for landfill vertical expansion are categorized according to the following slip surface positions: shallow slippage of the existing landfill, shallow slippage of the expanding landfill, interface slip between the existing landfill and expanding landfill, and deep slippage passes through the foundation soil. (2) The factor of safety decreases as the height of leachate level increases. When the height of leachate level rises from 2 m to 20 m, the factor of safety of the landfill is reduced by 13.2–15.4%. (3) As the vertical expansion height increases, the factor of safety of the existing landfill decreases, and when the expansion height increases to 30 m, the stability factor of safety of the old waste landfill is reduced by 4.83%. A landfill in Xi’an is considered as an example for the analysis, which shows that a leachate drainage layer can discharge leachate from the landfill body efficiently, reduce the leachate level height of the landfill body, and improve the stability of vertical expansion of the landfill. This study and its findings can be used as a reference for similar expansion projects.
25
Zin, Nur Shaylinda Mohd, Hamidi Abdul Aziz, Mohd Nordin Adlan, Azlan Ariffin, Mohd Suffian Yusoff, and Irvan Dahlan. "A Comparative Study of Matang and Kuala Sembeling Landfills Leachate Characteristics." Applied Mechanics and Materials 361-363 (August 2013): 776–81. http://dx.doi.org/10.4028/www.scientific.net/amm.361-363.776.
Full textAbstract:
Understanding the characteristic of leachate is important since it has complexity properties because of the variation in its composition. This study, analyzed and compared two leachate from two landfill sites, namely, Matang and Kuala Sembeling landfill. Leachate raw samples were collected by grab sampling and were analyzed for 11 parameters. The average concentrations of MLS and KSLS leachate such as BOD5 (146 and 61 mg/L), COD (828 and 363 mg/L), pH (7.6 and 8), SS (407 and 220 mg/L), ammonia (868 and 367 mg/L) , BOD/COD (0.18 and 0.14), cadmium (0.19 and 0.1 mg/L), cuprum (0.09 and 0.1 mg/L), nickel (0.17 and 0.1 mg/L), manganese (0.09 and 0.22 mg/L), and ferum (2.3 and 8.3 mg/L) were recorded, respectively. The results revealed that the both landfills are categorized as partially stabilized leachate. The strength of leachate pollutants from MLS are higher than KSLS because of the higher fraction of organics concentration. There are 5 parameters (BOD5, COD, ammonia, SS and cadmium) in MLS and 7 parameters (BOD5, COD, ammonia, SS, cadmium, manganese and ferum) in KSLS exceeded the permissible limit stated by MEQA (1974), and so leachates from both landfill sites need a suitable treatment to reduce the concentration of the leachate pollutants before discharge into environment.
26
Krishnamurthy, M. P., P. V. Sivapullaiah, and Shambavikamath. "Leachate Characteristics and Evaluating Leachate Contamination Potential of Landfill Sites Using Leachate Pollution Index." Asian Review of Civil Engineering 4, no. 1 (2015): 6–13. http://dx.doi.org/10.51983/tarce-2015.4.1.2214.
Full textAbstract:
The developing and under developing countries hazardous industrial waste is also mixed with municipal solid waste (MSW). The dumping of MSW in uncontrolled landfills can cause major impact on human health and surrounding environment. Leachate is the main culprit, causing pollution of surface water bodies and ground water. Ground water once contaminated, is very difficult task to improve. The aim of research study is to determine the leachate characteristics of Alevoor landfill near Udupi, India. The pH of samples was 8.21 and 7.77 respectively. This paper also presents the leachate contamination potential of Alevoor landfill using Rand Corporation Delphi Technique. The leachate pollution index (LPI) represents the level of contamination potential of given landfill. LPI is a single number express the overall leachate contamination potential of landfill based on several leachate pollution parameters at a given time. The LPI is also used to compare the contamination potential of different leachate sampling stations of Alevoor landfill. The LPI values of the Alevoor landfill is significantly high and proper treatment is required before the discharge of the leachate.
27
Suna Erses, A., and T. T. Onay. "Accelerated landfill waste decomposition by external leachate recirculation from an old landfill cell." Water Science and Technology 47, no. 12 (2003): 215–22. http://dx.doi.org/10.2166/wst.2003.0649.
Full textAbstract:
This research is focused on the management of moisture regime for a young landfill site in terms of leachate recirculation which entails the containment, collection and reinjection of leachate back into the landfill to promote in situ anaerobic biological treatment. Moreover, an innovative leachate management strategy was developed by using leachate recirculation from a mature landfill site into a young landfill site to provide accelerated waste stabilization. For this purpose, two reactors simulating young and old landfills were used in the laboratory. These reactors were loaded with shredded and compacted municipal solid waste with a typical composition determined for Istanbul Region. Both reactors were operated in a constant temperature room at 32°C to enhance the growth of anaerobic microorganisms. Moreover, water was added to the reactors in order to simulate the annual rainfall. The reactor having the properties of old landfills was used as a control reactor. The reactor which represented the characteristics of young landfill was operated under four operational stages to enhance the activity of methanogenic population and accelerate waste stabilization. Results of this study indicated that the utilization of leachate recirculation enhanced waste stabilization in the young landfill by increasing the uniformity, and providing additional substrate and nutrients. Additions of buffer solutions of KOH and Na2CO3 together with leachate recirculation enhanced further waste stabilization and prevented possible acid inhibition. The utilization of external leachate recycled from the old landfill having desired acclimated anaerobic microorganisms, low organic content and higher buffer capacity into a young landfill could be a promising leachate management strategy for faster and controlled waste stabilization.
28
Tim, Robinson. "Treatment of Landfill Leachate at a Remote Closed Landfill Site on the Isle of Wight." Detritus, no. 10 (June 30, 2020): 182–99. http://dx.doi.org/10.31025/2611-4135/2020.13947.
Full textAbstract:
Safe treatment and disposal of leachates is an important issue at many old landfill sites, where the ingress of rainfall or groundwater is a significant issue requiring consideration. Such leachates may typically be relatively weak, but flows are often characterised by large seasonal variations, in response to winter rainfall. This paper compiles and presents long-term data from a case study on the Isle of Wight, UK. This paper highlights how a successful treatability trial using representative leachates can help predict the effectiveness of a large-scale treatment plant when treating landfill leachates biologically. Bleakdown leachate treatment plant effectively removes all concentrations of ammoniacal-N within the weak leachate generated by the site, ensuring that the discharge consent set by the Environment Agency is achieved consistently. The site is completely unmanned and remote, where monitoring technicians are only required to attend site twice per month in order to assess the success of the biological process. Through an online SCADA control system, operation of the treatment plant can be monitored and controlled remotely, trends in results can be observed, and daily data and treatment records downloaded. This treatment plant is an example of how leachate from old closed landfills can be effectively managed, with very low costs of operation, maintenance and site attendance. This paper presents comprehensive analytical and volumetric treatment data from the Bleakdown LTP, before presenting practical steps that would enable this success to be replicated at similar remote closed landfill sites.
29
Hu, Yuansi. "A microwave radiation-enhanced Fe–C/persulfate system for the treatment of refractory organic matter from biologically treated landfill leachate." RSC Advances 11, no. 47 (2021): 29620–31. http://dx.doi.org/10.1039/d1ra04995j.
Full textAbstract:
A microwave radiation enhanced Fe-C/PS system was used to treat biologically-treated landfill leachate. This process showed wide applicability in treatment of four types of leachates and has a promising potential in landfill leachate treatment.
30
Bilstad, T., and M. V. Madland. "Leachate Minimization by Reverse Osmosis." Water Science and Technology 25, no. 3 (1992): 117–20. http://dx.doi.org/10.2166/wst.1992.0084.
Full textAbstract:
Leachates from chemical and domestic landfills are defined as hazardous wastewater. Quantitative and qualitative control of leachate can be performed by membrane separation of the total produced leachate volume. Dissolved and suspended solids in the leachate are removed from the major portion of the water phase and either returned to the landfill or further treated. The particle - free permeate meets the effluent requirements for direct discharge to virtually any watercourse. An untreated leachate flow is concentrated thirteen times by tubular type reverse osmosis. The separation efficiencies are 99% for iron, copper, chromium and zinc. For suspended solids the removal is 100%.
31
Moktar, Khairul Anam, and Ramlah Mohd Tajuddin. "Phytoremediation of heavy metal from leachate using imperata cylindrica." MATEC Web of Conferences 258 (2019): 01021. http://dx.doi.org/10.1051/matecconf/201925801021.
Full textAbstract:
Landfill leachate has many toxic substances, which may adversely affect the environmental health. The high concentration of heavy metal in landfill leachate creates complication to its removal and management. Hence this research was conducted to explore the ability of phytoremediation using Imperata cylindrica to remove Lead, Zinc and Cadmium; which is deemed to be nature friendly and sustainable. Raw landfill leachates were taken from the collection ponds at Jeram Sanitary Landfill and placed in fabricated phytoremediation system at UiTM laboratory. Heavy metal concentration of leachate from this system was monitored for 30 days. It was found that Imperata cylindrica is able to remove lead, Zinc and Cadmium from the leachate.
32
Begunova, L. A., and A. N. Petrova. "Comparative evaluation of the results of chemical analysis of the solid municipal waste filtrate at the Irkutsk landfill." XXI Century. Technosphere Safety 8, no. 1 (2023): 18–26. http://dx.doi.org/10.21285/2500-1582-2023-1-18-26.
Full textAbstract:
Heavy metals are widespread chemical elements, many of which are toxic components polluting the biosphere. They include more than 40 are priority pollutants. Every year the danger of their getting them into the soil is increasing. A powerful source of release of harmful heavy metals into the environment are municipal solid waste (MSW) dumps. There are dozens of such these landfills in Irkutsk region, including the largest landfill in Irkutsk. In 2014 and 2019, on the territory of this landfill the landfill leachate was analyzed for the content of general chemical and toxic components. The comparative analysis showed that the landfill soil is extremely dangerous. The excess of MPC of heavy metals in the filtrate ranged from 2.4 to 67.6. The article presents the results of the analysis of landfill leachate taken in 2021 in the sanitary protection zones, and compared with the previously obtained data. It was established that the chemical and biochemical processes between various components of landfill leachates cause the formation of toxic compounds and become sources of infection. Precipitation forms a large amount of leachate which has significant concentrations of especially toxic substances, which inevitably enter the groundwater. In addition to harmful compounds and heavy metals, wastewater also contains pathogenic microorganisms.
33
Jhamnani, Bharat, and S. K. Singh. "Migration of Tracer Contaminants from Landfills: Case Study for Chloride." Asian Journal of Water, Environment and Pollution 7, no. 2 (2010): 53–57. http://dx.doi.org/10.3233/ajw-2010-7_2_08.
Full textAbstract:
Point sources, such as landfills, can release high concentrations of pollutant into the ground water because of migration of leachate from its bottom, which is generated primarily as a result of precipitation falling on an active landfill surface, leaching out the potential organic and inorganic contaminants from landfilled waste and discharging the same to ground water in underlying aquifer. Leachate contains a high level of dissolved solids content, high concentration of organic matter, and a trace amount of hazardous constituents. To protect the ground water from contamination by landfill leachate, it is quite essential to provide the bottom barrier of suitable thickness, and to minimize the amount of water that could enter the landfill to create leachate. The present study was undertaken to determine the rate of movement of potential contaminants from its bottom to the aquifer media, so as to evolve a rational method for the determination of thickness of bottom barrier. The study was undertaken for conservative contaminant chloride. The governing equation of contaminant transport was solved using finite difference method, and finite mass boundary condition, to ape the field conditions of landfill. The solution of the model was run in MatLab 7.0 for a range of Darcy velocities, and equivalent height of leachate. Design curves were drawn which can be used for determination of suitable barrier thickness on the basis of expected maximum concentration of contaminant in landfill leachate and maximum permissible concentration of the same in groundwater.
34
Frikha, Youssef, Johann Fellner, and Moncef Zairi. "Leachate generation from landfill in a semi-arid climate: A qualitative and quantitative study from Sousse, Tunisia." Waste Management & Research: The Journal for a Sustainable Circular Economy 35, no. 9 (2017): 940–48. http://dx.doi.org/10.1177/0734242x17715102.
Full textAbstract:
Despite initiatives for enhanced recycling and waste utilization, landfill still represents the dominant disposal path for municipal solid waste (MSW). The environmental impacts of landfills depend on several factors, including waste composition, technical barriers, landfill operation and climatic conditions. A profound evaluation of all factors and their impact is necessary in order to evaluate the environmental hazards emanating from landfills. The present paper investigates a sanitary landfill located in a semi-arid climate (Tunisia) and highlights major differences in quantitative and qualitative leachate characteristics compared to landfills situated in moderate climates. Besides the qualitative analysis of leachate samples, a quantitative analysis including the simulation of leachate generation (using the HELP model) has been conducted. The results of the analysis indicate a high load of salts (Cl, Na, inorganic nitrogen) in the leachate compared to other landfills. Furthermore the simulations with HELP model highlight that a major part of the leachate generated originates form the water content of waste.
35
Liu, Hailong, Zhen Huyan, Chunyi Cui, Xiang Luo, and Xingyao Jiang. "Evaluation of Leachate Recirculation Effect on the Acceleration of Waste Mineralization Process by Using a Coupled Numerical Model." Advances in Civil Engineering 2021 (March 3, 2021): 1–10. http://dx.doi.org/10.1155/2021/8832085.
Full textAbstract:
Accelerating the waste mineralization is of great significance to control the settlement of transportation facilities nearby landfills. Mineralized waste can also be used as road construction materials to recycle waste resources and reduce the construction cost of transportation facilities. A biochem-hydro-mechanical-solute migration-coupled model for describing complex interactions in landfills with high kitchen waste content has been developed. The proposed model can consider large leachate production and landfill gas entrapment due to the fast degradation of kitchen waste. The quantitative effects of three leachate recirculation conditions are investigated in this article via a typical landfill cell. According to the simulation results, introducing methanogen into landfills with leachate recirculation can relieve acidification caused by fast hydrolysis of kitchen waste and speed up the mineralization process of landfills with high kitchen waste content significantly. Furthermore, landfill gas generation potential loss and fast degradation compression should be considered in the implementation of leachate recirculation in landfills with high kitchen waste content, which helps to maintain the operation of transportation facilities nearby landfills and improve the economic and environmental benefits of leachate treatment.
36
Xie, Mingde, Xi Guo, and Dan Liu. "Leachate Pretreatment before Pipe Transportation: Reduction of Leachate Clogging Potential and Upgrading of Landfill Gas." International Journal of Environmental Research and Public Health 19, no. 10 (2022): 6349. http://dx.doi.org/10.3390/ijerph19106349.
Full textAbstract:
Leachate and landfill gas are the main contaminants produced by modern sanitary landfills. The leachate easily leads to clogging in the leachate transportation pipe, and the landfill gas can be used as renewable energy after the removal of CO2. The study aims to investigate the removal of the major scale forming ion of Ca2+ in leachate using raw landfill gas before pipe transportation. The research demonstrated that, under the given experimental conditions, the removal rate of Ca2+ in the leachate was positively correlated with the pH value of the leachate, and negatively correlated with the intake flow rate of the landfill gas; the highest removal rate of Ca2+ was achieved when the intake flow rate and volume were 0.05 L/min and 2.0 L, respectively, and the highest removal rate of Ca2+ from the leachate was about 90%. The maximum removal rate of CO2 from landfill gas could reach 95%, and the CO2 content of the post-reaction gas was as low as 1.74% (volume percentage). The scanning electron microscope (SEM) and X-ray diffraction (XRD) analysis showed that the precipitate was spherical and mainly contained inorganic substances such as CaCO3, MgCO3, Ca(OH)2, Mg(OH)2, and SiO2. The study showed that, before the leachate was piped, the Ca2+ could be removed using the raw landfill gas, thereby reducing the potential for the formation of precipitation clogging in the pipeline. This study also provides new ideas for upgrading landfill gas to achieve a renewable-energy utilization plan, and reduces greenhouse gas emissions by reducing CO2 emissions from landfills.
37
Chin, Pui Mun, Aine Nazira Naim, Fatihah Suja, and Muhammad Fadly Ahmad Usul. "Impact of Effluent from the Leachate Treatment Plant of Taman Beringin Solid Waste Transfer Station on the Quality of Jinjang River." Processes 8, no. 12 (2020): 1553. http://dx.doi.org/10.3390/pr8121553.
Full textAbstract:
Rapid population growth has contributed to increased solid waste generated in Malaysia. Most landfills that have reached the design capacity are now facing closure. Taman Beringin Landfill was officially closed, so the Taman Beringin Solid Waste Transfer Station was built to manage the relocation, consolidation, and transportation of solid waste to Bukit Tagar Sanitary Landfill. Leachates are generated as a consequence of rainwater percolation through waste and biochemical processes in waste cells. Leachate treatment is needed, as leachates cause environmental pollution and harm human health. This study investigates the impact of treated leachate discharge from a Leachate Treatment Plant (LTP) on the Jinjang River water quality. The performance of the LTP in Taman Beringin Solid Waste Transfer Station was also assessed. Leachate samples were taken at the LTP’s anoxic tank, aeration tank, secondary clarifier tank, and final discharge point, whereas river water samples were taken upstream and downstream of Jinjang River. The untreated leachate returned the following readings: biochemical oxygen demand (BOD) (697.50 ± 127.94 mg/L), chemical oxygen demand (COD) (2419.75 ± 1155.22 mg/L), total suspended solid (TSS) (2710.00 ± 334.79 mg/L), and ammonia (317.08 ± 35.45 mg/L). The LTP’s overall performance was satisfactory, as the final treated leachates were able to meet the standard requirements of the Environmental Quality (Control of Pollution from Solid Waste Transfer Station and Landfill) Regulation 2009. However, the LTP’s activated sludge system performance was not satisfactory, and the parameters did not meet the standard limits. The result shows a low functioning biological treatment method that could not efficiently treat the leachate. However, a subsequent step of combining the biological and chemical process (coagulation, flocculation, activated sludge system, and activated carbon adsorption) helped the treated leachate to meet the standard B requirement stipulated by the Department of Environment (DOE), i.e., to flow safely into the river. This study categorized Jinjang River as polluted, with the discharge of the LTP’s treated leachates, possibly contributing to the river pollution. However, other factors, such as the upstream sewage treatment plant and the ex-landfill downstream, may have also affected the river water quality. The LTP’s activated sludge system performance at the transfer station still requires improvement to reduce the cost of the chemical treatment.
38
Jabłońska-Trypuć, Agata, Elżbieta Wołejko, Urszula Wydro, Jacek Leszczyński, Mariola Wasil, and Anna Kiełtyka-Dadasiewicz. "Chemical Composition and Toxicological Evaluation of Landfill Leachate from Białystok, Poland." Sustainability 15, no. 23 (2023): 16497. http://dx.doi.org/10.3390/su152316497.
Full textAbstract:
Leachates from landfills constitute a very complex environmental matrix with potentially toxic properties for both the environment and humans. Due to this fact, toxicological tests were carried out on landfill leachate (LL) obtained from the local landfill in Hryniewicze (Poland). The analyses included physicochemical studies of leachates and their impact on soil and plants, and studies conducted in bacterial models and human cell models. The results obtained indicate high contents of metals and organic matter, especially dangerous PAHs, in the tested leachate. This results in the influence of LL on changes in the content of assimilation pigments and oxidative stress observed in plants grown in soil fed with leachates. The effect of leachate on the growth of Sporosarcina pasteurii, Staphylococcus aureus, Lactobacillus rhamnosus, Saccharomyces boulardii and Candida albicans varied depending on the strain and LL dose. A particularly significant increase in proliferation after exposure to LL was noted for S. aureus. In studies conducted on human cancer cell lines representing three types of glioblastomas and one type of colorectal adenocarcinoma, a particularly significant increase in the viability of cells treated with LL was noted for the DLD-1 cell line. The results obtained, especially the stimulation of the growth of cancer cells and an increase in the number of pathogenic bacteria, indicate the potential toxic properties of the tested leachates. This is confirmed by the high level of oxidative stress in plants. The results indicate the need for continuous monitoring of waste landfills and leachates generated there.
39
Sembiring, Emenda, and Attar Hikmahtiar Ramadan. "Microplastic pollution from active and inactive landfill in Indonesia: Case study in Leuwigajah and Sarimukti Landfill." E3S Web of Conferences 485 (2024): 05011. http://dx.doi.org/10.1051/e3sconf/202448505011.
Full textAbstract:
A landfill is the most common waste disposal in Indonesia, yet the implementation and operation of landfills are still far from optimal due to lack of funding and management failure. Moreover, landfill was operated as unmanaged open dumps. This situation could enhance the likelihood of plastics pollution through various transport of plastic waste from landfill sites, including microplastics release from leachate. This study was focused on the evidence of microplastic pollution originating from the landfill. Leachate sampling was conducted at two landfills, an inactive landfill called Leuwigajah Landfill, and an active landfill called Sarimukti Landfill. The characteristics of microplastics were analyzed through visual examination, particle density examination, and polymer investigation utilizing Fourier Transform Infrared Spectroscopy (FTIR). All three samples of active and inactive landfill leachate contains microplastic particles. The concentration ranges from 12.00 ± 5.29 to 56.33 ± 3.06 particles/liter. The most dominant polymers of plastic are Polypropylene (PP) and Polyester. Fiber shape is the highest percentage of founded microplastics. The results show the critical information of landfill likelihood as a source of microplastics.
40
Hoai, Son Tran, Huong Nguyen Lan, Nga Tran Thi Viet, Giang Nguyen Hoang, and Ken Kawamoto. "Characterizing Seasonal Variation in Landfill Leachate Using Leachate Pollution Index (LPI) at Nam Son Solid Waste Landfill in Hanoi, Vietnam." Environments 8, no. 3 (2021): 17. http://dx.doi.org/10.3390/environments8030017.
Full textAbstract:
The improper treatment of landfill leachates is one of the major problems associated with waste landfilling and causes serious environmental pollution at waste landfill sites and their surroundings. To develop a suitable landfill leachate treatment system and to minimize the risk of environmental pollution, it is important to characterize seasonal and temporal variations of landfill leachates. This study investigated the leachate quality of the Nam Son waste landfill in Hanoi, Vietnam in 2017–2019 and characterized the potential risks of landfill leachate using a leachate pollution index (LPI). The results of this study showed that the seasonal and temporal variation of the overall LPI during the monitoring period was small and in the range of 20–25 (values 2.5 times higher than the maximum permissible limits of Vietnam National Technical Regulation on Industrial Wastewater). The LPI sub-indices attributed to organic and inorganic pollutants were major components of the LPI. Especially, the annually averaged values of LPI of inorganic pollutants were 7.7 times higher than the maximum permissible limits, suggesting that the treatment of inorganic pollutants, such as ammonium-nitrogen (NH4+–N) and total nitrogen (TN), is highly required at Nam Son landfill to prevent environmental pollution surrounding the landfill site.
41
NAIR K., DEEPA, ZACHARIAH E.J, VINOD P., et al. "ENHANCED IN-SITU REDUCTION OF LEACHATE PARAMETERS DUE TO AERATION AND LEACHATE RECIRCULATION IN PILOT SCALE MSW BIOREACTOR LANDFILL MODELS IN TROPICAL CLIMATE." Pollution Research 42, no. 04 (2023): 463–70. http://dx.doi.org/10.53550/pr.2023.v42i04.009.
Full textAbstract:
The processes for optimizing toxicity removal of leachate from pilot scale Municipal Solid Waste bioreactor landfills were attempted. Landfill models were simulated in Fibre Reinforced Plastic tanks of size 1.5m x 1.0m x 1.0m by applying interventions like aeration and leachate recirculation. It was found that the Chemical Oxygen Demand and Biochemical Oxygen Demand values increased till 46th week after which the values started reducing. On 89th week after closure of landfill, the aerobic landfill model showed the minimum values for COD (10,200 mg/l) and both anaerobic and aerobic models with leachate recirculation had the lowest BOD (4934 mg/l). By 116th week the least concentrations of COD and BOD were in anaerobic landfill model with leachate recirculation (64 and 22 mg/l). Ammonia Nitrogen was the least in aerated model with leachate recirculation by 116th week from closure (281 mg/l). Conductivity was less in the landfill models with leachate recirculation (4.2 and 5 mS/cm for anaerobic and aerobic respectively).
42
Rajasekar, Adharsh, Raju Sekar, Eduardo Medina-Roldán, Jonathan Bridge, Charles K. S. Moy, and Stephen Wilkinson. "Next-generation sequencing showing potential leachate influence on bacterial communities around a landfill in China." Canadian Journal of Microbiology 64, no. 8 (2018): 537–49. http://dx.doi.org/10.1139/cjm-2017-0543.
Full textAbstract:
The impact of contaminated leachate on groundwater from landfills is well known, but the specific effects on bacterial consortia are less well-studied. Bacterial communities in a landfill and an urban site located in Suzhou, China, were studied using Illumina high-throughput sequencing. A total of 153 944 good-quality reads were produced and sequences assigned to 6388 operational taxonomic units. Bacterial consortia consisted of up to 16 phyla, including Proteobacteria (31.9%–94.9% at landfill, 25.1%–43.3% at urban sites), Actinobacteria (0%–28.7% at landfill, 9.9%–34.3% at urban sites), Bacteroidetes (1.4%–25.6% at landfill, 5.6%–7.8% at urban sites), Chloroflexi (0.4%–26.5% at urban sites only), and unclassified bacteria. Pseudomonas was the dominant (67%–93%) genus in landfill leachate. Arsenic concentrations in landfill raw leachate (RL) (1.11 × 103 μg/L) and fresh leachate (FL2) (1.78 × 103 μg/L) and mercury concentrations in RL (10.9 μg/L) and FL2 (7.37 μg/L) exceeded Chinese State Environmental Protection Administration standards for leachate in landfills. The Shannon diversity index and Chao1 richness estimate showed RL and FL2 lacked richness and diversity when compared with other samples. This is consistent with stresses imposed by elevated arsenic and mercury and has implications for ecological site remediation by bioremediation or natural attenuation.
43
McCreanor, P. T., and D. R. Reinhart. "Hydrodynamic modeling of leachate recirculating landfills." Water Science and Technology 34, no. 7-8 (1996): 463–70. http://dx.doi.org/10.2166/wst.1996.0655.
Full textAbstract:
Leachate recirculation is an emerging technology for the enhanced stabilization of active landfills and in-situ treatment of problematic landfills. A variety of researcher have documented the benefits of increasing landfill moisture content and liquid movement through the fill. However, little work has addressed the hydrodynamic characteristics of the recirculating landfill, specifically the effect of leachate flow rate and waste characteristics upon leachate routing. This paper presents the results of mathematical modeling of the horizontal infiltration trench and vertical infiltration well, two commonly employed leachate application methods. The results of transient unsaturated flow modeling are detailed.
44
A, RAVIKUMAR, and SATHIESHKUMAR T. "Experimental Investigation of Leachate Treatment Using Low-Cost Adsorbents." INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 08, no. 008 (2024): 1–13. http://dx.doi.org/10.55041/ijsrem37021.
Full textAbstract:
The aim of the project work is to treat the landfill leachate before disposal. The necessity for landfill leachate treatment is a requisite to reduce the environmental related to impact related to municipal solid waste land fill. If leachate is directly disposed into environment it creates serious problems on the surrounding soil, ground water aquifers and nearby surface water. Therefore great attention has been directed towards new techniques based on physico- chemical process, and heavy metals removal using low cost materials as filter media with down flow reactor. Leachate generation is a major problem for municipal solid waste (MSW) landfills and causes significant threat to surface water and groundwater. Leachate can be defined as a liquid that passes through a landfill and has extracted dissolved and suspended matter from it. Leachate results from precipitation entering the landfill from moisture that exists in the waste when it is composed. Different consider while deciding for an appropriate treatment process. This paper presents the results of the analyses of leachate treatment from the solid waste land fill. Key Words: : Leachate, physico-chemical process, landfill, precipitation, solid waste, Municipal Solid Waste (MSW).
45
Li, Yarong, Gary K. C. Low, Ying Lei, Cheryl E. Halim, and Rose Amal. "Microbial Reduction of Hexavalent Chromium in Landfill Leachate." Australian Journal of Chemistry 57, no. 10 (2004): 967. http://dx.doi.org/10.1071/ch04069.
Full textAbstract:
Landfill leachates were found to exhibit reducing properties whereby chromium(vi) was converted into chromium(iii). The reduction is attributed to a microbial process in the presence of high concentrations of organic materials in the leachates. Nonputrescible landfill leachate (NPLL) was found to reduce CrVI to a lesser extent than the municipal landfill leachate (MLL). Microbial reduction of CrVI was also found to occur under alkaline conditions in extracts from a cementitious waste. A 55% reduction of CrVI was achieved by enriching the extract with bacteria and organic material.
46
Umar, Muhammad, Hamidi Abdul Aziz, and Mohd Suffian Yusoff. "Variability of Parameters Involved in Leachate Pollution Index and Determination of LPI from Four Landfills in Malaysia." International Journal of Chemical Engineering 2010 (2010): 1–6. http://dx.doi.org/10.1155/2010/747953.
Full textAbstract:
Landfill sites are potential sources of human and environmental hazards. Leachate produced form these waste dumping sites is heterogeneous and exhibits huge temporal and seasonal variations. Leachate pollution index (LPI) provides an overall pollution potential of a landfill site. The parameters required to calculate LPI from a landfill site are discussed in terms of their variations over time, and their significance has been highlighted in the context of LPI. The LPI values of two semiaerobic and two anaerobic landfill sites in Malaysia have been calculated in this study. Pulau Burung Landfill Site (PBLS) was found to have the highest LPI score while Ampang Jajar Landfill Site (AJLS) showed the lowest LPI as compared to other landfills. It is concluded that LPI value can be used as a tool to assess the leachate pollution potential from landfill sites particularly at places where there is a high risk of leachate migration and pollution of groundwater.
47
Alslaibi, Tamer M., Yunes K. Mogheir, and Samir Afifi. "Analysis of landfill components in estimating the percolated leachate to groundwater using the HELP model." Water Science and Technology 62, no. 8 (2010): 1727–34. http://dx.doi.org/10.2166/wst.2010.457.
Full textAbstract:
Landfills are one of the groundwater pollution sources in Gaza Strip. This study focuses on two landfills operating in Gaza Strip; the first is Dear Al Balah landfill which has a lining system and the second landfill is Gaza landfill which does not have a lining system. The main objective of the present study is to assess the effect of landfill components on percolated leachate to groundwater aquifer using the Hydrologic Evaluation of Landfill Performance (HELP) model. A comprehensive analysis of landfill components affecting the generated leachate was conducted. The results showed that the landfill components were ordered in priority according to their effects on percolated leachate through clay layer as follows: (1) existing of lining system enhances the percolation reduction up to 87%, (2) 30% reduction of rainfall level enhances the percolation reduction up to 50%, (3) 50% reduction of existing landfill area enhances the percolation reduction up to 50%, and (4) the absent of recirculation system slight enhances the percolation reduction up to 2.5% more than with the availability of recirculation system. The waste depth has no significant effect on the quantity of percolated leachate. Analysis suggested that changes in lining system type, rainfall level, landfill area, and recirculation ratio have the most significant impact on model outputs indicating that these parameters should be carefully selected when similar modeling studies are performed.
48
V, Chavan Vaishnavi. "Evaluation of Municipal Solid Waste Landfill by HELP Model and Leachate Modelling by Hydrus-1d: A Review." International Journal for Research in Applied Science and Engineering Technology 12, no. 12 (2024): 79–82. https://doi.org/10.22214/ijraset.2024.65712.
Full textAbstract:
The effective management of municipal solid waste (MSW) landfills is vital for minimizing their environmental and public health impacts. The Hydrologic Evaluation of Landfill Performance (HELP) model and HYDRUS-1D are widely used tools for modeling landfill hydrology and leachate dynamics, respectively. This review consolidates recent advances in their application for evaluating MSW landfills. The HELP model's capabilities in simulating landfill hydrological behavior and HYDRUS-1D’s precision in modeling leachate transport through porous media are explored. The paper highlights the advantages, limitations, and future directions for integrating these models in landfill studies to promote sustainable waste management practices.
49
Lin, Chia-Wei, and Mei-Hui Li. "Effects of Two Types of Landfills on River Water Quality and Endocrine Disruptor Concentrations Before and After Rainfall in a Subtropical Climate." Water Quality Research Journal 44, no. 4 (2009): 355–63. http://dx.doi.org/10.2166/wqrj.2009.036.
Full textAbstract:
Abstract One closed uncontrolled landfill, the Neihu garbage dump, and one active controlled landfill, the Sanzhuku sanitary landfill, were selected for investigation of their leachate characteristics and effects on adjacent river water quality before and after rainfall in northern Taiwan. A total of seven samplings were made during February and June 2007, with four samplings done after individual rainfall events on study sites. Water quality of runoff samples collected from the Sanzhuku sanitary landfill showed less pollution than the water quality of leachates collected from the Neihu garbage dump; however, some water quality levels of leachate samples collected from the Neihu garbage dump were relatively high, such as ammonia nitrogen (NH3-N), orthophosphate (PO43-) and biochemical oxygen demand (BOD5). At the uncontrolled dump, rainfall lead to dilution effects on river water NH3-N and PO43- concentrations, but not other water quality parameters. In contrast, the concentrations of bisphenol A (BPA) and nonylphenol were increased in both types of landfills after rainfall in the present study. Dilution effects of rainfall on most water quality parameters and toxicity tests were observed in the Neihu garbage dump leachates after rainfall, but not for the Sanzhuku Landfill runoff. The highest concentration of BPA measured in this study was 25.8 μg L-1 in the Sanzhuku sanitary landfill runoff after the heaviest rainfall event, during which 236 mm of rainfall accumulated over four days. The results of this study suggest that both uncontrolled and controlled landfill leachates can be an important potential pollution source of BPA to adjacent water bodies.
50
Borquaye, Lawrence Sheringham, Edmund Ekuadzi, Godfred Darko, et al. "Occurrence of Antibiotics and Antibiotic-Resistant Bacteria in Landfill Sites in Kumasi, Ghana." Journal of Chemistry 2019 (July 4, 2019): 1–10. http://dx.doi.org/10.1155/2019/6934507.
Full textAbstract:
The incidence of antimicrobial resistance among microbial communities is a major threat to global health care and security. Landfills, which are reservoirs for many pharmaceuticals, provide a conducive habitat for antimicrobial-resistant microbes and resistant gene transfer and are therefore a major contributor to the phenomenon of antimicrobial resistance. Hence, this study determined the levels of three widely used antibiotics, metronidazole, penicillin, and amoxicillin, and the occurrence of antimicrobial resistance amongst microbes in soil and leachate samples from active and abandoned landfill sites in Kumasi, Ghana. Soil samples were collected from one active and four abandoned landfills, while leachate specimen was collected only from the active landfill. Sonication and solid-phase extraction (SPE) were used for sample preparation, followed by analysis via an HPLC-PDA method. Isolation and characterization of bacteria were done using standard bacteriological techniques. Antibiotic susceptibility testing was determined following the European Committee on Antimicrobial Susceptibility Testing (EUCAST) guidelines. Antibiotics were detected at very high concentrations in the specimen collected from both active and abandoned landfill sites. For leachate samples obtained from Dompoase, penicillin was present at the highest concentration (67.42 ± 5.35 μg/mL, p<0.05) followed by metronidazole (18.25 ± 7.92 μg/mL) and amoxicillin (10.96 ± 6.93 μg/mL). In general, the levels of antibiotics in soil samples were similar at both active and abandoned landfill sites. Nonetheless, as with leachates, penicillin levels were much higher (p<0.05) than levels of amoxicillin and metronidazole within any particular site. When screened against some antibiotics, Enterobacteriaceae and some Bacillus and Listeria species isolated from the soil and leachate samples proved to be resistant. The high levels of antibiotics coupled with the presence of resistant microbes at these landfills sites call for immediate measures to halt the disposal of pharmaceuticals in the environment so as to avert any possible public health setback.