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Journal articles on the topic 'Anaerobic digestion sludge'

Author: Grafiati

Published: 5 September 2021

Last updated: 29 July 2025

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1

Zhao, Guo Han, and Shun Sheng Yang. "Analysis of Changes in Gas Composition during Startup Process." Applied Mechanics and Materials 484-485 (January 2014): 423–26. http://dx.doi.org/10.4028/www.scientific.net/amm.484-485.423.

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Start is an important link of sludge anaerobic digestion process, it is can according to the sludge disposal in sludge volume and there is no vaccination to select the startup method. Gas components are the important study-factors of anaerobic digestive startup, to visually reflect the stability of the anaerobic digestion of the startup process, in order to accurately analyze the causes of imbalance of anaerobic digestion process, to guide the anaerobic digestion system startup.

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2

Zhao, Zehua, Yuanshun Xu, Tianfeng Wang, Xiaowei Xu, Houhu Zhang, and Jing Hua. "Effects of sludge properties in a combined process of mesophilic anaerobic digestion and thermophilic aerobic digestion." E3S Web of Conferences 194 (2020): 04015. http://dx.doi.org/10.1051/e3sconf/202019404015.

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The combination of mesophilic anaerobic digestion and thermophilic aerobic digestion (MAN-TAD) has been recognized as a suitable technology to deal with conventional activated sludge. The MAN-TAD system can make sludge achieve better stability. The retention time of anaerobic digestion (AD-time) had an important role in the sludge stabilization process. With the extension of anaerobic digestion retention time, MAN-TAD system can make sludge achieve better stability. In comparison, volatile/total solids ratio (VS/TS) at AD-time of 38 d presented the lowest values among the three different AD-ti

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3

Xie, Li Ping, and Xia Wu. "Effect of Wastewater Treatment Processes on the Combustion Properties of Sewage Sludge." Advanced Materials Research 113-116 (June 2010): 1153–57. http://dx.doi.org/10.4028/www.scientific.net/amr.113-116.1153.

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The combustion properties of five different sewage sludges were studied by thermal gravimetric analysis in the atmosphere of “oxygen”and “nitrogen + oxygen”, respectively. The results indicate that there are not influence of wastewater treatment process and the sludges anaerobic digestion on the combustion process, but both of the “anaerobic” wastewater treatment and the sludge anaerobic digestion make the ignition temperature of sludge higher, and the temperature of anaerobic digestion sludge is the highest. The relationship among the ignition temperatures of five sludges is independent of co

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4

Park, C., and R. F. Helm. "Application of metaproteomic analysis for studying extracellular polymeric substances (EPS) in activated sludge flocs and their fate in sludge digestion." Water Science and Technology 57, no. 12 (2008): 2009–15. http://dx.doi.org/10.2166/wst.2008.620.

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Metaproteomic analysis, comprising protein separation and identification, was applied to study extracellular proteins in activated sludges and to track their fate in sludge digestion under both anaerobic and aerobic conditions. The complex sludge proteins were first separated by sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS-PAGE) and further analysed by liquid chromatography tandem mass spectrometry (LC-MS/MS) to search their identification. Base extraction and cation exchange resin (CER) method were used to extract EPS from sludges at 0, 12 and 30 days of batch digestion. Se

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5

Reimers, R. S., D. B. McDonell, M. D. Little, D. D. Bowman, A. J. Englande, and W. D. Henriques. "Effectiveness of Wastewater Sludge Treatment Processes to Inactivate Parasites." Water Science and Technology 18, no. 7-8 (1986): 397–404. http://dx.doi.org/10.2166/wst.1986.0314.

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In the United States, Ascaris spp., Trichuris trichiura, Trichuris vulpis and Toxocara spp. are the most commonly found viable parasites in both treated and untreated municipal sludges. As expected, heat treatment, thermophilic digestion (aerobic and anaerobic) and thermophilic composting were effective in parasite inactivation, and with good sludge digestion (both aerobic and anaerobic), the effectiveness of sludge lagoon storage and sludge drying beds to inactivate parasites and pathogens is greatly enhanced. At present two commercial sludge processes, Chemfixation and Ozonics treatment have

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6

Watanabe, Haruki, Tomokazu Kitamura, Shuichi Ochi, and Masaaki Ozaki. "Inactivation of pathogenic bacteria under mesophilic and thermophilic conditions." Water Science and Technology 36, no. 6-7 (1997): 25–32. http://dx.doi.org/10.2166/wst.1997.0571.

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This paper concerns field survey and laboratory experiment on the inactivation of pathogenic bacteria during sludge treatment processes with particular emphasis on anaerobic digestion process. We surveyed the inactivation of pathogenic bacteria processes by sampling various types of sludges from 17 wastewater treatment plants located in Japan and counting the number of bacteria in the sampled sludges. The bacteria we counted included fecal coliform groups, enterococcus and salmonella. The median number of fecal coliform groups in primary sludge was found to be 105 MPN/g, while the number of fe

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7

Jones, R., W. Parker, Z. Khan, S. Murthy, and M. Rupke. "Characterization of sludges for predicting anaerobic digester performance." Water Science and Technology 57, no. 5 (2008): 721–26. http://dx.doi.org/10.2166/wst.2008.013.

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Batch anaerobic digestion tests of primary sludge and waste activated sludge were conducted for a duration of 123 days to determine the ultimate degradability of the sludges. For primary sludges the inert fraction of the particulate COD that was predicted by the wastewater models could be employed to predict their biodegradability under anaerobic conditions. The degradation of waste activated sludge was adequately characterized for the first 60 days of digestion using a model that assumed equivalent biodegradability of particulate COD components under aerobic and anaerobic conditions. However

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8

Wichitsathian, Boonchai, Jareeya Yimratanabovorn, and Watcharapol Wonglertarak. "Enhancement of performance and biodegradability kinetics of aerobic-anaerobic sludge digestion." E3S Web of Conferences 167 (2020): 01010. http://dx.doi.org/10.1051/e3sconf/202016701010.

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The excess sludge problem from a wastewater treatment plant is a great concerned due to the high cost of sludge management accounting for about 20% to 50% of the total operating cost. Therefore, sludge reduction is critical. Currently, aerobic and/or anaerobic sludge digestions are widely used in the industries for treating the excess sludge. The objective of this research was to study the effects of aeration rate and temperature on the excess sludge reduction by using the aerobic-anaerobic digestion system in the laboratory. The aeration rates of 1.0, 0.5, and 0.1 volume air per volume slurry

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9

Kindzierski, Warren B., and Steve E. Hrudey. "Effects of phosphorus removal chemicals upon methane production during anaerobic sludge digestion." Canadian Journal of Civil Engineering 13, no. 1 (1986): 33–38. http://dx.doi.org/10.1139/l86-005.

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Aluminum sulphate (alum) and ferric chloride are commonly employed to aid phosphorus removal in wastewater treatment. Previous studies have indicated that these chemical coagulants produce sludges that adversely affect anaerobic digestion. The objective of this study was to assess the magnitude of the effects chemical coagulants have upon methane generation in anaerobic digestion. Methane production was monitored and concentrations of aluminum or iron present during batch digestion of chemically precipitated sludge were measured.Both alum and ferric chloride addition to activated sludge produc

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10

Ye, Fenxia, Xinwen Liu, and Ying Li. "Extracellular polymeric substances and dewaterability of waste activated sludge during anaerobic digestion." Water Science and Technology 70, no. 9 (2014): 1555–60. http://dx.doi.org/10.2166/wst.2014.401.

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Anaerobic digestion of waste activated sludge was conducted to gain insight into the mechanisms underlying change in sludge dewaterability during its anaerobic digestion. Unexpectedly, the results indicated that sludge dewatering properties measured by capillary suction time only deteriorated after 10 days of anaerobic digestion, after which dewaterability recovered and remained stable. The loosely bound extracellular polymeric substance (LB-EPS) content increased three-fold after 20 days of anaerobic digestion, and did not change significantly during the remaining 30 days. The tightly bound E

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11

Anderson, B. C., D. S. Mavinic, and J. A. Oleszkiewicz. "Stabilization of combined wastewater sludge: anaerobic processes." Canadian Journal of Civil Engineering 22, no. 2 (1995): 223–34. http://dx.doi.org/10.1139/l95-032.

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Pilot-scale research was conducted to quantify the effects of stabilizing combined wastewater sludges (primary and biological nutrient removal waste activated sludges), in a common high-rate, single-stage anaerobic digestion operation. Various ratios of primary to waste activated sludge were used, and digester operational efficiency was assessed on the basis of the amount and rate of volatile mass removal, biogas production, and digester supernatant quality. It was found that, depending on the sludge ratio, addition of the biological nutrient removal waste activated sludge decreased digester o

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12

Parra Orobio, Brayan Alexis, Melkin Nieto Mendoza, Diego Rivera Henao, Pablo Cesar Manyoma Vélasquez, and Patricia Torres Lozada. "Selection of inocula conditioning methodologies for the anaerobic digestion of food waste." Revista Facultad de Ingeniería Universidad de Antioquia, no. 92 (May 8, 2019): 9–18. http://dx.doi.org/10.17533/udea.redin.20190510.

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Food waste (FW) has a high potential for use in biological processes such as anaerobic digestion (AD), especially due to its high content of biodegradable organic matter. To inoculate the reactors, sludge is usually used. The sludge should ideally have good sedimentation and specific methanogenic activity (SMA), which is typical for granular sludge. However, in a Latin American context, the most available and accessible sludges are flocculants with low sedimentation and SMA. Applying technological surveillance between 1975 and 2017, using multicriteria analysis techniques such as analytical hi

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13

Brayan, Alexis Parra-Orobio, Nieto-Mendoza Melkin, Rivera-Henao Diego, Cesar Manyoma-Velásquez Pablo, and Torres-Lozada Patricia. "Selection of inocula conditioning methodologies for the anaerobic digestion of food waste." Revista Facultad de Ingeniería, Universidad de Antioquia, no. 92 (May 8, 2019): 9–18. https://doi.org/10.17533/udea.redin.20190510.

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Food waste (FW) has a high potential for use in biological processes such as anaerobic digestion (AD), especially due to its high content of biodegradable organic matter. To inoculate the reactors, sludge is usually used. The sludge should ideally have good sedimentation and specific methanogenic activity (SMA), which is typical for granular sludge. However, in a Latin American context, the most available and accessible sludges are flocculants with low sedimentation and SMA. Applying technological surveillance between 1975 and 2017, using multicriteria analysis techniques such as analytical hi

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14

Neis, U., K. Nickel, and A. Tiehm. "Enhancement of anaerobic sludge digestion by ultrasonic disintegration." Water Science and Technology 42, no. 9 (2000): 73–80. http://dx.doi.org/10.2166/wst.2000.0174.

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Biological cell lysis is known to be the rate limiting step of anaerobic sludge stabilization. Shear forces generated by high-power ultrasound can be used to disintegrate bacterial cells in sewage sludge. Thus the quantity of bioavailable dissolved organic substrate (Chemical Oxygen Demand) is significantly increased. As a result the subsequent sludge degradation is accelerated considerably. In our tests the fermentation process of sonicated waste activated sludge remained stable even at a very short digestion time of 4 days. The enhanced degradation rate resulted in a reduced volatile solids

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15

Li, Chenchen, Huan Li, and Yuyao Zhang. "Alkaline treatment of high-solids sludge and its application to anaerobic digestion." Water Science and Technology 71, no. 1 (2014): 67–74. http://dx.doi.org/10.2166/wst.2014.469.

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High-solids anaerobic digestion is a promising new process for sludge reduction and bioenergy recovery, requiring smaller digestion tanks and less energy for heating, but a longer digestion time, than traditional low-solids anaerobic digestion. To accelerate this process, alkaline sludge disintegration was tested as a pretreatment method for anaerobic digestion of high-solids sludge. The results showed that alkaline treatment effectively disintegrated both low-solids sludge and high-solids sludge, and treatment duration of 30 min was the most efficient. The relation between sludge disintegrati

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16

Aoki, Nobuhiro, and Mitsuo Kawase. "Development of High-Performance Thermophilic Two-Phase Digestion Process." Water Science and Technology 23, no. 7-9 (1991): 1147–56. http://dx.doi.org/10.2166/wst.1991.0566.

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Anaerobic digestion of anaerobic sewage sludge leads to the generation of methane gas and reduction of the sludge volume. Because conventional digestion requires a long time, the digestion facilities must be large. We studied decomposing volatile suspended solids (VSS) in sewage sludge, capacitating high acid generation rates and a high-speed methane evolution reactor to reduce retention time for anaerobic digestion. We also studied how to increase VSS reduction ratio by using bio-technology. The high-performance thermophilic two-phase digestion (HPTTD) process is proposed as a innovative dige

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17

Ge, H., P. D. Jensen, and D. J. Batstone. "Relative kinetics of anaerobic digestion under thermophilic and mesophilic conditions." Water Science and Technology 64, no. 4 (2011): 848–53. http://dx.doi.org/10.2166/wst.2011.571.

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With several advantages over the conventional mesophilic anaerobic digestion, such as better sludge quality and higher biogas production, thermophilic anaerobic digestion is regarded as a promising alternative for sludge digestion. Primary and activated sludges are complex materials, and historically, analysis of kinetics has been largely on whole sludge, without analysis of individual components. This paper analyses relative digestion kinetics of pure substrates designed to target main stages of sludge digestion under thermophilic and mesophilic conditions. Hydrolysis rate of cellulose was si

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18

Wei, Na. "Effect of Ultrasonic Pretreatment for the Anaerobic Digestion of Sewage Sludge." Advanced Materials Research 531 (June 2012): 528–31. http://dx.doi.org/10.4028/www.scientific.net/amr.531.528.

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Anaerobic digestion is an economic and environmentally friendly technology for treating the biomass material-sewage sludge, but has some limitations, such as the low efficient biogass production. In this paper ultrasound was proposed as pre-treatment for effective sludge anaerobic digestion. Sludge anaerobic digestion experiments with ultrasonic pretreatment was investigated. It can be seen that this treatment effectively leaded to the increase of soluble chemical oxygen demand(SCOD) and volatile fatty acids(VFA)concentration. High concentration of VFA leaded to a increase in biogas production

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19

Novak, John T., and Chang Min Park. "The effect of iron and aluminium for phosphorus removal on anaerobic digestion and organic sulfur generation." Water Science and Technology 62, no. 2 (2010): 419–26. http://dx.doi.org/10.2166/wst.2010.300.

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The addition of iron or aluminium into activated sludge basins for phosphorus removal is likely to impact both the efficiency of the anaerobic digestion process and the generation of odor-causing compounds following digestion and dewatering. In this study, the impact of iron and aluminium addition on digestion and odor-causing compounds was investigated by using batch digestion of combined primary and waste activated sludge. It was found that aluminium addition resulted in a decrease in volatile solids destruction by anaerobic digestion of approximately 2%. Of the 7 sludges tested, 5 showed a

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20

Tamar, Shreen Abdulkareem, and Mustafa Ismail Umer. "Stabilization of Sludge in Zakho Municipal Wastewater by Anaerobic Digestion for Biogas Production in Kurdistan Region, Iraq." Science Journal of University of Zakho 10, no. 3 (2022): 86–92. http://dx.doi.org/10.25271/sjuoz.2022.10.3.924.

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Raw wastewater sludge samples were collected from two sanitary point sources in Zakho city wastewater pipes. Anaerobic digestion is utilized sludge stabilization as it was effective in reducing the volume of sludge and cheap source of clean biogas. the sludge of municipal wastewater of Zakho district is worth to be used for the generation of biogas and just 15 -17 kg sludge produced 233 to 350 m3 gas in solid retention time of 18 and 24 day respectively. Suspended solid is close related to the amount of COD that removed from sludge and approximately 1 kg COD generate 0.5-0.55 Kg suspended soli

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21

Sakaveli, Foteini, Maria Petala, Vasilios Tsiridis, and Efthymios Darakas. "Enhancing Methane Yield in Anaerobic Co-Digestion of Primary Sewage Sludge: A Comprehensive Review on Potential Additives and Strategies." Waste 2, no. 1 (2024): 29–57. http://dx.doi.org/10.3390/waste2010002.

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Traditionally, anaerobic digestion has been applied to mixed sludge, combining primary sludge (PS) with secondary sludge. However, recent research has unveiled the advantages of dedicated PS digestion due to its higher energy content. Anaerobic digestion (AD) of primary sewage sludge can offer a sustainable solution for managing sewage sludge while generating renewable energy. The present study provides a comprehensive examination of the current state of knowledge regarding the anaerobic digestion of PS. Co-digestion of PS with organic substrates, including food waste and agro-industrial resid

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22

Sakaveli, Foteini, Maria Petala, Vasilios Tsiridis, and Efthymios Darakas. "Enhanced Mesophilic Anaerobic Digestion of Primary Sewage Sludge." Water 13, no. 3 (2021): 348. http://dx.doi.org/10.3390/w13030348.

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Processing of the produced primary and secondary sludge during sewage treatment is demanding and requires considerable resources. Most common practices suggest the cotreatment of primary and secondary sludge starting with thickening and anaerobic digestion. The aim of this study is to investigate the anaerobic digestion of the primary sludge only and estimate its impact on sludge treatment and energy recovery. Within this context, the performance of the anaerobic digestion of primary sludge is explored and focused on practices to further enhance the methane production by using additives, e.g.,

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23

Chow, Wei Ling, Siewhui Chong, Jun Wei Lim, et al. "Anaerobic Co-Digestion of Wastewater Sludge: A Review of Potential Co-Substrates and Operating Factors for Improved Methane Yield." Processes 8, no. 1 (2020): 39. http://dx.doi.org/10.3390/pr8010039.

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Anaerobic digestion has been widely employed in waste treatment for its ability to capture methane gas released as a product during the digestion. Certain wastes, however, cannot be easily digested due to their low nutrient level insufficient for anaerobic digestion, thus co-digestion is a viable option. Numerous studies have shown that using co-substrates in anaerobic digestion systems improve methane yields as positive synergisms are established in the digestion medium, and the supply of missing nutrients are introduced by the co-substrates. Nevertheless, large-scale implementation of co-dig

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24

Ofverstrom, Svetlana, Ieva Sapkaitė, and Regimantas Dauknys. "THE IMPACT OF CHEMICAL PHOSPHORUS REMOVAL ON THE PROCESS OF ANAEROBIC SLUDGE DIGESTION." Mokslas - Lietuvos ateitis 2, no. 5 (2010): 71–74. http://dx.doi.org/10.3846/mla.2010.094.

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The paper investigates the efficiency of the mixture of primary sludge and excess activated sludge in Vilnius WWTP with reference to the anaerobic digestion process. Sludge digestion was carried out under laboratory conditions using anaerobic sludge digestion model W8 (Armfield Ltd., UK). Laboratory analyses consist of two periods – the anaerobic digestion of the un-dosed and Fe-dosed sludge mixture. The results of digestion were processed using the methods of statistical analysis. The findings showed reduction in volatile solids approx. by 6% when dosing min FeCl3·6H2O and 15% when dosing max

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25

Chen, S. T., and P. M. Berthouex. "Treating an aged pentachlorophenol- (PCP-) contaminated soil through three sludge handling processes, anaerobic sludge digestion, post-sludge digestion and sludge land application." Water Science and Technology 44, no. 10 (2001): 149–56. http://dx.doi.org/10.2166/wst.2001.0606.

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The extensive pentachlorophenol (PCP) contamination and its increasing treatment costs motivate the search for a more competitive treatment alternative. In a municipal wastewater treatment plant, anaerobic sludge-handling processes comprises three bio-processes, namely the anaerobic sludge digestion, post-sludge digestion and sludge land application, which reduce sludge organic content and make sludge a good fertilizer for land application. Availability and effectiveness make the anaerobic sludge handling processes potential technologies to treat PCP-contaminated soil. The technical feasibilit

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26

Eskicioglu, C., K. J. Kennedy, and R. L. Droste. "Initial examination of microwave pretreatment on primary, secondary and mixed sludges before and after anaerobic digestion." Water Science and Technology 57, no. 3 (2008): 311–17. http://dx.doi.org/10.2166/wst.2008.010.

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The effects of microwave pretreatment on disintegration and mesophilic digestion of waste activated sludge (WAS), primary sludge (PS), combined (PS + WAS) sequencing batch reactor (SBR) sludge and anaerobically digested biocake were investigated by both household and bench scale industrial types microwaves at temperatures below and above boiling point. Pretreatment variables, temperature, intensity (cooking rate) and sludge concentration had statistically significant effects on solubilization. The microwave pretreatment also increased the bioavailability of sludge components under batch anaero

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27

Wu, Q., P. L. Bishop, T. C. Keener, J. Stallard, and L. Stile. "Sludge digestion enhancement and nutrient removal from anaerobic supernatant by Mg(OH)2 application." Water Science and Technology 44, no. 1 (2001): 161–66. http://dx.doi.org/10.2166/wst.2001.0039.

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Anaerobic sludge digestion is a widely adopted process for sludge stabilization. Phosphate removal from anaerobic supernatant is necessary to limit the phosphate returned to the head of the treatment plant, thereby improving the overall treatment efficiency. In this study, magnesium hydroxide (Mg(OH)2) was used to improve the sludge digestion efficiency and to remove phosphorus from anaerobic supernatant. The anaerobic sludge digestion experiment was conducted at a pilot scale, and the results showed that applying Mg(OH)2 to anaerobic sludge digester resulted in a larger reduction in SS and CO

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28

Jenicek, P., C. A. Celis, L. Krayzelova, N. Anferova, and D. Pokorna. "Improving products of anaerobic sludge digestion by microaeration." Water Science and Technology 69, no. 4 (2013): 803–9. http://dx.doi.org/10.2166/wst.2013.779.

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Biogas, digested sludge and sludge liquor are the main products of anaerobic sludge digestion. Each of the products is influenced significantly by specific conditions of the digestion process. Therefore, any upgrade of the digestion technology must be considered with regard to quality changes in all products. Microaeration is one of the methods used for the improvement of biogas quality. Recently, microaeration has been proved to be a relatively simple and highly efficient biological method of sulfide removal in the anaerobic digestion of biosolids, but little attention has been paid to compar

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29

Yaser, Abu Zahrim, Junidah Lamaming, Emma Suali, et al. "Composting and Anaerobic Digestion of Food Waste and Sewage Sludge for Campus Sustainability: A Review." International Journal of Chemical Engineering 2022 (June 22, 2022): 1–14. http://dx.doi.org/10.1155/2022/6455889.

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Composting and anaerobic digestion have emerged as better options for managing food waste and sewage sludge at the campus level. This review highlights the characteristics of food waste and sewage sludge from various global higher education institutions. The composting and anaerobic digestion processes of food waste and sewage sludge will be reviewed and evaluated. Also, the adoption of composting and anaerobic digestion at various campus levels has been reviewed. The challenges and future direction, focusing on managing university campus composting and anaerobic digestion, are discussed as we

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30

Huang, Siyan, Liu Yang, and Lianguo Ji. "Current Status and Development Trends of Sludge Disposal Technology." E3S Web of Conferences 290 (2021): 03002. http://dx.doi.org/10.1051/e3sconf/202129003002.

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Sludge is a typical solid waste of sewage treatment plants, and its disposal methods have attracted much attention. This paper summarized the current technical routes for sludge disposal in China, including anaerobic digestion, anaerobic fermentation, incineration, landfill, land utilization, and building materials utilization. In the context of energy saving and carbon reduction and the promotion of resource recovery, enhanced pretreatment technology of sludge anaerobic digestion and anaerobic fermentation technology for fuel gas production are the first choices for sludge disposal and resour

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Ward, Amanda, H. David Stensel, John F. Ferguson, Gregory Ma, and Stan Hummel. "Effect of autothermal treatment on anaerobic digestion in the dual digestion process." Water Science and Technology 38, no. 8-9 (1998): 435–42. http://dx.doi.org/10.2166/wst.1998.0835.

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The performance of two laboratory mesophilic anaerobic digesters was studied to determine if the claims for improved mesophilic anaerobic digestion following autothermal pre-treatment are valid and if the benefits claimed are affected by the mesophilic digester SRT. One digester was fed sludge taken after a full-scale autothermal reactor and the other was fed sludge from the same plant just before the autothermal treatment unit. Autothermal treatment did not significantly increase volatile solids destruction kinetics during subsequent anaerobic digestion. The VS destruction rate was 2.7 to 2.8

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Rühl, Johannes, and Markus Engelhart. "Evaluating the Performance of Anaerobic Digestion with Upstream Thermal Hydrolysis—What Role Does the Activated Sludge Process Play?" Fermentation 10, no. 11 (2024): 591. http://dx.doi.org/10.3390/fermentation10110591.

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The performance of anaerobic digestion of mixed sludge (MS) with upstream thermal hydrolysis of waste activated sludge (WAS) was evaluated and compared to conventional anaerobic digestion. In contrast to previous studies, this work focuses on the evaluation of the impact of the activated sludge process, which was assessed using a temperature-normalized solids retention time (SRTASP,T). For this purpose, data from a full-scale wastewater treatment plant related to SRTASP,T, primary sludge (PS) and WAS production were combined with experimental data from laboratory-scale anaerobic digestion of P

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33

Wang, Jing, Bing Liu, Feiyong Chen, et al. "Enhancing Mesophilic Anaerobic Digestion of Waste-Activated Sludge through Heat Pretreatment and Kinetic Modeling." Sustainability 15, no. 7 (2023): 5985. http://dx.doi.org/10.3390/su15075985.

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Sewage sludge is a useful raw material for the production of renewable energy due to its stable annual output. In this study, the enhancement of mesophilic anaerobic digestion of sewage sludge through heat pretreatment at 95 °C for 30 min was tested in an anaerobic moving bed biofilm reactor (hAMBBR). The sludge retention time was set at 20, 15, 10, and 5 days during 300 days of operation and compared to a traditional anaerobic continuous stirred tank reactor (AnCSTR) without pretreatment. Results of this research indicate that the digestion ratio of volatile soluble solids in the hAMBBR proce

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34

Carrieri, C., A. C. Di Pinto, A. Rozzi, and M. Santori. "Anaerobic Co-Digestion of Sewage Sludge and Concentrated Soluble Wastewaters." Water Science and Technology 28, no. 2 (1993): 187–97. http://dx.doi.org/10.2166/wst.1993.0102.

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The anaerobic treatment of sewage sludges (primary and secondary) mixed to concentrated soluble wastes (olive mill effluents, cheese whey and landfill leacheate) in conventional once-through and anaerobic contact digesters, has been investigated in laboratory scale reactors. Experimental results indicate that it is possible to increase appreciably (100 %) the volumetric loading rate of sludge digesters (anaerobic contact) by addition of soluble substrates and keep stable operating conditions. The proposed treatment is economically very attractive if the load due to high strength wastewaters is

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Hogan, F., S. Mormede, P. Clark, and M. Crane. "Ultrasonic sludge treatment for enhanced anaerobic digestion." Water Science and Technology 50, no. 9 (2004): 25–32. http://dx.doi.org/10.2166/wst.2004.0526.

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Ultrasound is the term used to describe sound energy at frequencies above 20 kHz. Highpowered ultrasound can be applied to a waste stream via purpose-designed tools in order to induce cavitation. This effect results in the rupture of cellular material and reduction of particle size in the waste stream, making the cells more amenable to downstream processing. sonixTM is a new technology utilising high-powered, concentrated ultrasound for conditioning sludges prior to further treatment. This paper presents recent results from a number of demonstration and full-scale plants treating thickened was

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Kopp, Julia, Johannes Müller, Norbert Dichtl, and Jörg Schwedes. "Anaerobic digestion and dewatering characteristics of mechanically disintegrated excess sludge." Water Science and Technology 36, no. 11 (1997): 129–36. http://dx.doi.org/10.2166/wst.1997.0403.

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Mechanical cell disintegration and its influence on anaerobic digestion was investigated using four different methods. Methods to describe the degree of cell-disruption were developed and the release of organic components into the sludge water was measured. The best results were optained using a stirred ball mill and a high-pressure homogenizer. The influence of disintegration rate and digestion time on the performance of the anaerobic process and the dewatering characteristics were investigated. The degradation is accelerated and the digestion time can be reduced, especially when using immobi

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Ahn, Jeong-Yoon, and Soon-Woong Chang. "Effects of Sludge Concentration and Disintegration/Solubilization Pretreatment Methods on Increasing Anaerobic Biodegradation Efficiency and Biogas Production." Sustainability 13, no. 22 (2021): 12887. http://dx.doi.org/10.3390/su132212887.

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It is urgent to determine suitable municipal sludge treatment solutions to simultaneously minimize the environmental negative impacts and achieve sustainable energy benefits. In this study, different sludge pretreatment techniques were applied and investigated to enhance the sludge solubility and, subsequently, facilitate the anaerobic biodegradation performance of the mixed sludge under different sludge concentrations and pretreatment techniques. The sludge characteristics before and after pretreatment and batch experiments of anaerobic digestion of sludge samples under different conditions w

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Orikawa, M., H. Kamahara, Y. Atsuta, and H. Daimon. "Application of Hydrothermal Treatment to High Concentrated Sewage Sludge for Anaerobic Digestion Process." International Journal of Renewable Energy Development 2, no. 3 (2013): 165–68. http://dx.doi.org/10.14710/ijred.2.3.165-168.

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Tomato and seaweed were produced by utilizing CO2 and heat discharged from power generation using biogas in Toyogawa biomass park, Japan. The biogas was obtained by anaerobic digestion with hydrothermal treatment. The hydrothermal treatment was applied to the high concentrated sewage sludge (22 % total solids (TS) dewatered sludge). The purpose of this study is to clarify the effect of hydrothermal treatment on the qualities of high concentrated sewage sludge, by analyzing particulate organic carbon (POC) and dissolved organic carbon (DOC). The hydrothermal treatment was investigated under 10-

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Abe, Naoki, Yue-Qin Tang, Makoto Iwamura, Shigeru Morimura, and Kenji Kida. "Pretreatment followed by anaerobic digestion of secondary sludge for reduction of sewage sludge volume." Water Science and Technology 67, no. 11 (2013): 2527–33. http://dx.doi.org/10.2166/wst.2013.154.

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The influence of two pretreatment methods, thermal treatment and low-pressure wet oxidation, on the sludge digestion efficiency was examined. Batch thermophilic anaerobic digestion was used to evaluate the effectiveness of the pretreatment methods in terms of volatile suspended solids (VSS) digestion efficiency and gas production. The results showed that the gas production was not proportional to the VSS degradation efficiency of either thermal treatment or low-pressure wet oxidation. Low-pressure wet oxidation treatment at 150 °C along with 40% of the theoretical oxygen required to oxidize or

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Mansor, Mariatul Fadzillah, MD Sabuj Hosen, and MD Zahangir Alam. "Anaerobic co-digestion of sewage sludge and food waste as a promising alternative for waste management and energy production." Chemical and Natural Resources Engineering Journal (Formally known as Biological and Natural Resources Engineering Journal) 2, no. 1 (2019): 26–46. https://doi.org/10.31436/cnrej.v2i1.27.

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Biogas is an economical and environmentally friendly renewable energy which can be produced by anaerobic digestion (AD). This biochemical method converts organic compounds (mainly from wastes) into a sustainable source of energy. Anaerobic co-digestion (AcoD) is a method combining more than one substrate to resolve the difficulties faced in a single substrate AD system. Solid wastes increases as the population increase so do the urbanization and industrial industries. Food waste and sewage sludge are examples of one of the solid wastes. Co-digesting of both substrates may improve process stabi

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Jokela, Jari, Jukka Rintala, Aimo Oikari, Olli Reinikainen, Kari Mutka, and Timo Nyrönen. "Aerobic composting and anaerobic digestion of pulp and paper mill sludges." Water Science and Technology 36, no. 11 (1997): 181–88. http://dx.doi.org/10.2166/wst.1997.0409.

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The feasibility of aerobic vessel composting and anaerobic digestion for the treatment of pulp and paper mill sludges were studied. The composting studies made use of primary and secondary sludge from a de-inking and paper mill. In six parallely aerated 500 1 vessels with various carbon : nitrogen (C:N) -ratios, the most optimal performance was obtained with C:N -ratios of c. 22–35, while higher and lower ratios delayed the temperature increase. With the optimal ratios, the thermophilic stage was reached within 36 h, and the stage lasted for about seven days. In the scale-up study (18 m3 compo

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Damtie, Mekdimu Mezemir, Jingyeong Shin, Hyun Min Jang, and Young Mo Kim. "Synergistic Co-Digestion of Microalgae and Primary Sludge to Enhance Methane Yield from Temperature-Phased Anaerobic Digestion." Energies 13, no. 17 (2020): 4547. http://dx.doi.org/10.3390/en13174547.

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A two-stage temperature-phased mesophilic anaerobic digestion assay was carried out to study the interaction between various biological pretreatment conditions and the possible synergistic co-digestion of microalgae and primary sludge. The study of growth kinetics of the biochemical methane potential test revealed that a maximum of 36% increase in methane yield was observed from co-digestion of a substrate pretreated by thermophilic aerobic conditions (55 °C and HRT = 2 days) and an 8.3% increase was obtained from the anaerobic pretreated substrate (55 °C and HRT = 3 days). Moreover, no synerg

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Glanpracha, Naraporn, B. M. N. Basnayake, Eldon R. Rene, Piet N. L. Lens, and Ajit P. Annachhatre. "Cyanide degradation kinetics during anaerobic co-digestion of cassava pulp with pig manure." Water Science and Technology 2017, no. 3 (2018): 650–60. http://dx.doi.org/10.2166/wst.2018.210.

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Abstract Anaerobic co-digestion of cassava pulp (CP) and pig manure (PM) under cyanide inhibition conditions was investigated and modeled. Batch experiments were performed with initial cyanide concentrations ranging from 1.5 to 10 mg/L. Cyanide acclimatized sludge from an anaerobic co-digester treating cyanide-containing CP and PM was used as the seed sludge (inoculum). Cyanide degradation during anaerobic digestion consisted of an initial lag phase, followed by a cyanide degradation phase. After a short sludge acclimatization period of less than 3 days, the anaerobic sludge was able to degrad

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Ofverstrom, Svetlana, Regimantas Dauknys, and Ieva Sapkaitė. "THE EFFECT OF IRON SALT ON ANAEROBIC DIGESTION AND PHOSPHATE RELEASE TO SLUDGE LIQUOR / GELEŽIES DRUSKOS ĮTAKA ANAEROBINIO DUMBLO PŪDYMO PROCESUI IR FOSFATŲ IŠSISKYRIMUI Į DUMBLO VANDENĮ." Mokslas - Lietuvos ateitis 3, no. 5 (2011): 123–26. http://dx.doi.org/10.3846/mla.2011.097.

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Iron salts are used at wastewater treatment plants (WWTPs) for several reasons: for removing chemical phosphorus, preventing from struvite formation and reducing the content of hydrogen sulfide (H2S) in biogas. Anaerobic digestion is a common scheme for sludge treatment due to producing biogas that could be used as biofuel. Laboratory analysis has been carried out using anaerobic digestion model W8 (Armfield Ltd, UK) to investigate any possible effect of adding FeCl3 on the anaerobic digestion of primary sludge (PS) and waste activated sludge (WAS) mixture as well as on releasing phosphates to

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Hwang, Ho-Jae, and Euiso Choi. "Nutrient control with other sludges in anaerobic digestion of BPR sludge." Water Science and Technology 38, no. 1 (1998): 295–302. http://dx.doi.org/10.2166/wst.1998.0070.

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Nutrient released from BPR sludge during anaerobic digestion was refixed with Ca2+ and Mg2+ ions as calcium phosphate and struvite. The higher contents of Ca and Mg in primary sludge and nightsoil showed potentialities to control the nutrient returning back to liquid stream when these sludges were mixed with BPR sludge. Addition of Mg2+ to BPR sludge was also effective. The amount of TP removed from a sludge could be computed from the amount of P refixed by the amount of Ca and Mg removed during digestion. About 40 to 45% of TP and 35 to 39% of TN removal efficiencies could be expected when pr

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Thuy, Bui Thi. "ANAEROBIC DIGESTION OF SLUDGE IN WASTEWATER TREATMENT PLANT FOR ENERGY RECOVERY – A CASE STUDY OF HANOI URBAN DISTRICT." Vietnam Journal of Science and Technology 54, no. 2A (2018): 21. http://dx.doi.org/10.15625/2525-2518/54/2a/11905.

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In a wastewater treatment plant (WWTP) energy optimization is a big concern whilst sludge stabilization and energy recovery by anaerobic digestion implementation has recently gained importance. The calculation of an urban district level (selected as Long Bien) with 352,000 populations showed that with a total energy required of 39,750 kWh per day in WWTP, it could be supplied by utilization of biogas production, varying from 0% to ~ 43.44 % depending upon the non-application or application of anaerobic digestion for sludge treatment. In mesophylic anaerobic digestion, the biogas yields product

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Skiadas, I. V., H. N. Gavala, J. Lu, and B. K. Ahring. "Thermal pre-treatment of primary and secondary sludge at 70 °°C prior to anaerobic digestion." Water Science and Technology 52, no. 1-2 (2005): 161–66. http://dx.doi.org/10.2166/wst.2005.0512.

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In general, mesophilic anaerobic digestion of sewage sludge is more widely used compared to thermophilic digestion, mainly because of the lower energy requirements and higher stability of the process. However, the thermophilic anaerobic digestion process is usually characterised by accelerated biochemical reactions and higher growth rate of microorganisms resulting in an increased methanogenic potential at lower hydraulic retention times. Furthermore, thermal pre-treatment is suitable for the improvement of stabilization and could be realized at relatively low cost especially at low temperatur

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Xiao, Huihuang, Jinsong Liang, Yuxuan Zhang, Jianning Chang, Ru Zhang, and Panyue Zhang. "Conversion of Materials and Energy in Anaerobic Digestion of Sewage Sludge with High-Pressure Homogenization Pretreatment." Processes 11, no. 8 (2023): 2467. http://dx.doi.org/10.3390/pr11082467.

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High pressure homogenization (HPH) pretreatment can improve sludge anaerobic digestion; however, the relationship among the material, energy conversion, and gas production efficiency was unclear under different operating conditions in sludge anaerobic digestion by HPH pretreatment. In this study, the performance of HPH pretreatment before sludge anaerobic digestion was investigated, and the relationship among the material, energy conversion, and gas production efficiency was explored. HPH pretreatment induced organic solubilization, and a maximum soluble chemical oxygen demand (SCOD)/total che

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Öden, Muhammed Kamil, İrfan Özer, and Bilgehan Yabgu Horasan. "Arıtma Çamurlarının Tarımsal Alanlarda Kullanım Örneklerinin Araştırılması." Turkish Journal of Agriculture - Food Science and Technology 7, no. 5 (2019): 743. http://dx.doi.org/10.24925/turjaf.v7i5.743-749.2400.

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Nowadays, due to some reasons, soil quality deteriorates, soil organic matter decreases, and plant growth is adversely affected such as damaging agricultural practices, unconscious pesticide and fertilizer use. There is also treatment sludge among the methods that will contribute to the soil. Sewage sludge, the inevitable by-product of municipal and other wastewater treatment plant operations, is a key issue in many countries due to its increasing volume and the impacts associated with its disposal. This environmentally hazardous treatment sludge can be significantly reduced by anaerobic diges

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Kim, Jongmin, John T. Novak, and Matthew J. Higgins. "Multistaged Anaerobic Sludge Digestion Processes." Journal of Environmental Engineering 137, no. 8 (2011): 746–53. http://dx.doi.org/10.1061/(asce)ee.1943-7870.0000372.

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