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Journal articles on the topic 'Anaerobic Digestor Effluent'

Author: Grafiati

Published: 6 September 2023

Last updated: 31 July 2025

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1

Morel, E., K. Santamaria, M. Perrier, S. R. Guiot, and B. Tartakovsky. "Multi-wavelength fluorometry for anaerobic digestion process monitoring." Water Science and Technology 52, no. 1-2 (2005): 465–71. http://dx.doi.org/10.2166/wst.2005.0554.

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Applicability of multi-wavelength fluorometry for anaerobic digestion process monitoring was investigated in a 3.5 L upflow anaerobic sludge bed (UASB) lab-scale reactor. Both off-line and on-line monitoring of key process parameters was tested. Off-line emission spectra were measured at an angle of 90° to the excitation beam using a cuvette. On-line measurements were carried out using a fiber optic probe in the external recirculation line of the digester. Fluorescence spectra were correlated to available analytical measurements to obtain partial least square regression models. An independent

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Sacks, J., and C. A. Buckley. "Anaerobic treatment of textile size effluent." Water Science and Technology 40, no. 1 (1999): 177–82. http://dx.doi.org/10.2166/wst.1999.0038.

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This investigation focused on the KwaZulu-Natal province, where a number of under-utilised and under-performing anaerobic digesters were identified. The aim of the study was to assess the potential for treatment of high-strength or toxic organic agro-industrial effluents in the available capacity. The anaerobic digestion of a textile size effluent was investigated. Inhibitory components and concentrations of the solution were identified. The size solution was degraded anaerobically but could cause overloading of a digester at high concentrations. The performance efficiency of the anaerobic dig

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Aasima, Abid, Khan Huriyah, Fatima Zeb Tehseen, et al. "Macromolecular characterization and growth kinetics of Arthrospiraplatensis and Chlorella Vulgarisas affected by different media (synthetic and Anaerobic Digestor Effluent) -Acomparative study." International Journal of Endorsing Health Science Research 8, no. 4 (2020): 188–201. https://doi.org/10.29052/IJEHSR.v8.i4.2020.188-201.

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Abstract <strong>Background:</strong> Global concern about the availability of irrefragable, nutritious food to the masses to eliminate malnutrition had raised interest in microalgae-based dietary supplements. Furthermore, improper disposal of industrial wastewater is contaminating freshwater resources around the world, which is increasing the demand for eco-friendly water recycling strategies. The focus has been shifted to the use of microalgae because of their ability to treat wastewater and their biotechnological applications. Among them, <em>Chlorella Vulgaris</em> and 

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Lee, Sangwon, Jiseon Kim, and Kangwoo Cho. "Surveying Metal Catalysts for Electrochemical Direct Oxidation of Small Organic Compounds." Ceramist 26, no. 3 (2023): 359–67. http://dx.doi.org/10.31613/ceramist.2023.26.3.01.

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Electrochemical degradation of organic molecules is important in wastewater treatment. In addition, the direct oxidation of small organics can be utilized for electrochemical hydrogen production or fuel cell. This study aimed to provide database for various anode catalysts that can degrade organic molecules such as urea, methanol, ethanol, glucose, ammonia, formic acid, acetic acid, oxalic acid in various pH conditions. Pt, Ni, Cu anodes were employed, and the target molecule concentration was 0.3 M. The activity was analyzed by the peak current densities of cyclic voltammetry. The Cu showed a

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Sousa, Francine Aparecida, Alessandro Torres Campos, Pedro Ivo Sodré Amaral, Daiane Cecchin, and Alessandro Vieira Veloso. "PRODUÇÃO DE BIOGÁS PROVENIENTE DE CAMAS SOBREPOSTAS DE SUÍNOS." ENERGIA NA AGRICULTURA 32, no. 3 (2017): 229. http://dx.doi.org/10.17224/energagric.2017v32n3p229-236.

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Foi avaliada a eficiência do processo de biodigestão anaeróbia e a produção de biogás proveniente de cama sobreposta de suínos em fase de terminação, em biodigestores de bancada. Foram utilizados 12 protótipos de biodigestores laboratoriais de batelada, confeccionados em recipiente plástico e PVC com o volume utilizado de 20 litros. Os tratamentos constituíram-se de dois materiais de cama sobreposta de suínos como substrato, diluídas em água: Tratamento (M+B) - cama de maravalha+bagaço de cana e tratamento (MAR) - cama de maravalha. Para cada tratamento, foi avaliado o potencial poluidor do ef

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Sacks, J., C. A. Buckley, E. Senior, and H. Kasan. "An assessment of the feasibility of anaerobic digestion as a treatment method for high strength or toxic organic effluents." Water Science and Technology 39, no. 10-11 (1999): 347–51. http://dx.doi.org/10.2166/wst.1999.0680.

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The anaerobic digestion process converts organic materials into a methane-rich biogas. The KwaZulu-Natal region has the potential to attract a significant amount of industry. The objective of this research was to assess the feasibility of using anaerobic digestion as a treatment method for high-strength or toxic organic effluents. A strategy was developed to evaluate the degradability and toxicity of effluents and, ultimately, predict the efficiency of treatment in a full-scale digester. This paper details the strategy and investigates the degradation potential of a textile size effluent (COD

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Sasaki, Ken, Tohru Tanaka, Yoshinori Nishizawa, and Mitsunori Hayashi. "Production of a herbicide, 5-aminolevulinic acid, by Rhodobacter sphaeroides using the effluent of swine waste from an anaerobic digestor." Applied Microbiology and Biotechnology 32, no. 6 (1990): 727–31. http://dx.doi.org/10.1007/bf00164749.

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Gunnarsson, Anita, Börje Lindén, and Ulla Gertsson. "Biodigestion of Plant Material Can Improve Nitrogen Use Efficiency in a Red Beet Crop Sequence." HortScience 46, no. 5 (2011): 765–75. http://dx.doi.org/10.21273/hortsci.46.5.765.

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Nitrogen (N) tied up in or lost from decomposing biomass decreases the residual N effects of green manure and of other crop residues. During anaerobic degradation in a biogas digestor (biodigestion), N mineralization takes place under conditions in which losses can be kept to a minimum. Therefore, biodigestion of green manure biomass and beet foliage was tested to generate readily available N and compared with a direct green manure fertilization system. The effluent was applied as fertilizer in field experiments on a sandy soil as a tool for improving N supply for an organic farming system. Da

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9

Nazo Edith, Kpata-Konan, Kouame Francis, and NGBADJO Tanon Virginie. "OPTIMIZATION OF CASSAVA EFFLUENT BIOMETHANIZATION WITH ASH AS COSUBSTRATE." International Journal of Advanced Research 11, no. 09 (2023): 1190–97. http://dx.doi.org/10.21474/ijar01/17634.

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The main objective of this study is to determine the optimal conditions for anaerobic biodigestion of cassava effluents with the ash of cassava peels as co-substrate. To do this, three (03) digesters were used in which were put effluent + ash for digester 1, effluent + ash + cow dung for digester 2 and effluent + ash + urine for digester 3. The physico-chemical parameters (temperature, pH), biochemical parameters (COD and TKN) and the volume of biogas produced were quantified. In each of the reaction media a decrease in values was observed in pH (digester 1: 7.15 to 6.92 digester 2: 7.20 to 5.

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Abid, Aasima, Huriyah Khan, Tehseen Fatima Zeb, et al. "Macromolecular characterization and growth kinetics of Arthrospira platensis and Chlorella Vulgaris as affected by different media (synthetic and Anaerobic Digestor Effluent) - A comparative study." INTERNATIONAL JOURNAL OF ENDORSING HEALTH SCIENCE RESEARCH (IJEHSR) 8, no. 4 (2020): 188–201. http://dx.doi.org/10.29052/ijehsr.v8.i4.2020.188-201.

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11

Abid, Aasima, Huriyah Khan, Tehseen Fatima Zeb, et al. "Macromolecular characterization and growth kinetics of Arthrospira platensis and Chlorella Vulgaris as affected by different media (synthetic and Anaerobic Digestor Effluent) - A comparative study." INTERNATIONAL JOURNAL OF ENDORSING HEALTH SCIENCE RESEARCH (IJEHSR) 8, no. 4 (2020): 188–201. http://dx.doi.org/10.29052/ijehsr.v8.i4.2020.188-201.

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12

Hemmati, Sadaf, M. Mostafa Elnegihi, Chee Hoong Lee, et al. "Synthesis of Large-Scale Bio-Hydrogen Network Using Waste Gas from Landfill and Anaerobic Digestion: A P-Graph Approach." Processes 8, no. 5 (2020): 505. http://dx.doi.org/10.3390/pr8050505.

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Due to the expanding concern on cleaner production and sustainable development aspects, a technology shift is needed for the hydrogen production, which is commonly derived from natural gas. This work aims to synthesise a large-scale bio-hydrogen network in which its feedstock, i.e., bio-methane, is originated from landfill gas and palm oil mill effluent (POME). Landfill gas goes through a biogas upgrader where high-purity bio-methane is produced, while POME is converted to bio-methane using anaerobic digestor (AD). The generated bio-methane is then distributed to the corresponding hydrogen sin

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Rönner-Holm, S. G. E., A. Żak, and N. C. Holm. "Comparison of different conditions, substrates and operation modes by dynamic simulation of a full-scale anaerobic SBR plant." Water Science and Technology 65, no. 3 (2012): 558–66. http://dx.doi.org/10.2166/wst.2012.887.

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Simulation studies for a full-scale anaerobic unit of a wastewater treatment plant (WWTP) were performed using the anaerobic digestion model no. 1 (ADM1). The anaerobic full-scale plant consists of one mesophilic and one thermophilic digester, operated in an anaerobic sequential batch reactor (ASBR) mode, and sludge enrichment reactors (SER) for each digester. The digesters are fed with a mixture of vegetable waste and process wastewater from the food factory. Characteristics such as CODtotal, Ntotal and NH4-N concentrations in the influent and effluent of the digester and SERs were measured a

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Yoshizu, Daichi, Soranosuke Shimizu, Miyu Tsuchiya, Keisuke Tomita, Atsushi Kouzuma, and Kazuya Watanabe. "Isolation of Electrochemically Active Bacteria from an Anaerobic Digester Treating Food Waste and Their Characterization." Microorganisms 12, no. 8 (2024): 1645. http://dx.doi.org/10.3390/microorganisms12081645.

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Studies have used anaerobic-digester sludge and/or effluent as inocula for bioelectrochemical systems (BESs), such as microbial fuel cells (MFCs), for power generation, while limited studies have isolated and characterized electrochemically active bacteria (EAB) that inhabit anaerobic digesters. In the present work, single-chamber MFCs were operated using the anaerobic-digester effluent as the sole source of organics and microbes, and attempts were made to isolate EAB from anode biofilms in MFCs by repeated anaerobic cultivations on agar plates. Red colonies were selected from those grown on t

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Mirtsou-Xanthopoulou, Chrysoula, Ioannis V. Skiadas, and Hariklia N. Gavala. "On the Effect of Aqueous Ammonia Soaking Pre-Treatment on Continuous Anaerobic Digestion of Digested Swine Manure Fibers." Molecules 24, no. 13 (2019): 2469. http://dx.doi.org/10.3390/molecules24132469.

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(1) Background: The continuously increasing demand for renewable energy sources renders anaerobic digestion as one of the most promising technologies for renewable energy production. Due to the animal production intensification, manure is being used as the primary feedstock for most biogas plants. Their economical profitable operation, however, relies on increasing the methane yield from the solid fraction of manure, which is not so easily degradable. The solid fraction after anaerobic digestion, the so-called digested fibers, consists mainly of hardly biodegradable material and comes at a low

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Lin, C. Y., T. Noike, H. Furumai, and J. Matsumoto. "A Kinetic Study on the Methanogenesis Process in Anaerobic Digestion." Water Science and Technology 21, no. 4-5 (1989): 175–86. http://dx.doi.org/10.2166/wst.1989.0221.

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Results obtained from experiments on two-phase anaerobic digestion using a high concentration of a volatile fatty acid (VFA) mixture were used to elucidate the kinetic mechanism of the methanogenesis process. The mixture consisted of the major intermediate products of anaerobic digestion, i.e., acetic acid (HAc), propionic acid (HPr) and butyric acid (HBu). The relationship between the rate of substrate utilization and substrate concentration in the digesters was in the form of a Michaelis-Menten equation. The rate-limiting step of the methanogenesis process, i.e., the conversion of HAc to met

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Salsali, H. R., W. J. Parker, and S. A. Sattar. "Impact of concentration, temperature, and pH on inactivation of Salmonella spp. by volatile fatty acids in anaerobic digestion." Canadian Journal of Microbiology 52, no. 4 (2006): 279–86. http://dx.doi.org/10.1139/w05-125.

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It is known that the presence of volatile fatty acids may play a role in the inactivation of pathogens for systems that employ an acid phase reactor. This study was conducted to investigate the influence of volatile fatty acids on the inactivation of Salmonella spp. over a range of digestion temperatures. In this study, digesters that were treating municipal wastewater treatment plant sludges were operated at temperatures that ranged from 35 to 49 °C and had a solids residence time of 15 days. Samples collected from the effluent of the digesters were dosed with solutions containing acetic, pro

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Siegrist, H., W. Hunziker, and H. Hofer. "Anaerobic digestion of slaughterhouse waste with UF-membrane separation and recycling of permeate after free ammonia stripping." Water Science and Technology 52, no. 1-2 (2005): 531–36. http://dx.doi.org/10.2166/wst.2005.0563.

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Anaerobic digestion can adapt to free ammonia to a certain extent. During the anaerobic digestion of slaughterhouse waste, however, an ammonia concentration of up to 15 g N l−1 can be reached in the sludge liquid and this will even inhibit adapted sludge. To lower this concentration, a fraction of the digester liquid must therefore be continuously separated from the digested sludge and the free ammonia stripped before the liquid is recycled to the digester. A mesophilic laboratory digester was successfully operated with an ammonium concentration of 4–5 g l−1 and a pH of 8.0–8.4. After free amm

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Marmanis, D., C. Emmanouil, A. Thysiadou, J. G. Fantidis, N. Kokkinos, and V. Diamantis. "Combined electrochemical treatment coupled to anaerobic digestion effluents." Journal of Physics: Conference Series 2339, no. 1 (2022): 012025. http://dx.doi.org/10.1088/1742-6596/2339/1/012025.

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Abstract Electrochemical treatment is an effective method to improve physicochemical characteristics of effluents and to minimize the environmental footprint of anaerobic digestion facilities. In the present research an anaerobic digester effluent was subjected to post-treatment, using electro-oxidation or electrocoagulation processes for significant reduction of Chemical oxygen demand and ammonia. A combined electro-oxidation and electrocoagulation treatment was also performed. Results show satisfactory decrease of both Chemical oxygen demand and ammonium nitrogen, which however were relative

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Kamarád, Luděk, Stefan Pohn, Günther Bochmann, and Michael Harasek. "Determination of mixing quality in biogas plant digesters using tracer tests and computational fluid dynamics." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 61, no. 5 (2013): 1269–78. http://dx.doi.org/10.11118/actaun201361051269.

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The total electricity demand of investigated biogas plants (BGP) makes up 7–8 % of the total electricity produced. Nearly 40 % of this energy is consumed just for mixing in digesters and the energy demand for mixing in some biogas plants can be even higher. Therefore, optimal mixing in anaerobic digesters is a basic condition for efficient plant operation and biogas production. The use of problematic substrates (e.g. grass silage or other fibrous substrates), installation of unsuitable mixing systems or inconvenient mixing intervals may lead to mixing problems. Knowledge about mixing in biogas

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Ruike, Wataru, Atsushi Higashimori, Junichi Yaguchi, and Yu-you Li. "Use of real-time PCR with propidium monoazide for enumeration of viable Escherichia coli in anaerobic digestion." Water Science and Technology 74, no. 5 (2016): 1243–54. http://dx.doi.org/10.2166/wst.2016.327.

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A combination of propidium monoazide (PMA) with real-time quantitative polymerase chain reaction (PMA-qPCR) was optimized to enumerate only viable Escherichia coli in anaerobic digestion processes. Repeating the PMA treatment twice and a final concentration of 100 μM resulted in an effective exclusion of DNA from heat-treated E. coli cells. In three anaerobic digestion processes, real-time PCR, PMA-qPCR, and the most probable number method (MPN) were used to estimate the numbers of total, viable, and culturable E. coli cells, respectively. Culturable concentrations of fecal coliforms were also

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Page, D. I., K. L. Hickey, R. Narula, A. L. Main, and S. J. Grimberg. "Modeling anaerobic digestion of dairy manure using the IWA Anaerobic Digestion Model no. 1 (ADM1)." Water Science and Technology 58, no. 3 (2008): 689–95. http://dx.doi.org/10.2166/wst.2008.678.

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The Anaerobic Digestion Model No. 1 (ADM1) can be used to describe treatment of dairy manure once manure characteristics have been incorporated in the model. In this paper a parameter set is presented that can be used with ADM1 for simulation of dairy manure digester performance. Model results have been verified with bench-scale experiments and reported data from full-scale systems. Model predictions fit experimental data best for biogas composition and digester effluent COD. Simulated biogas productions were inconsistent with measurements from three different digesters. The model overpredicte

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Nguyen Vo Chau, Ngan, Thao Huynh Van, Thuan Nguyen Cong, Lavane Kim, and Dan Van Pham. "Water lettuce (Pistia stratiotes L.) increases biogas effluent pollutant removal efficacy and proves a positive substrate for renewable energy production." PeerJ 11 (August 22, 2023): e15879. http://dx.doi.org/10.7717/peerj.15879.

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Background Aquatic plants play a crucial role in nature-based wastewater treatment and provide a promising substrate for renewable energy production using anaerobic digestion (AD) technology. This study aimed to examine the contaminant removal from AD effluent by water lettuce (WL) and produce biogas from WL biomass co-digested with pig dung (PD) in a farm-scale biogas digester. Methods The first experiment used styrofoam boxes containing husbandry AD effluent. WLs were initially arranged in 50%, 25%, 12.5%, and 0% surface coverage. Each treatment was conducted in five replicates under natural

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Sukias, J. P. S., and R. J. Craggs. "Digestion of wastewater pond microalgae and potential inhibition by alum and ammoniacal-N." Water Science and Technology 63, no. 5 (2011): 835–40. http://dx.doi.org/10.2166/wst.2011.101.

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Algae are produced in considerable quantities in oxidation ponds, and may negatively affect receiving waters when discharged at high concentration. Thus in some instances they require removal prior to effluent discharge, which may be enhanced using flocculants such as alum. Harvested algal biomass could be anaerobically digested to methane for use as a renewable energy source, however, alum, has been reported to inhibit anaerobic digestion. Psychrophilic (20°C) anaerobic digestion experiments showed a 13% reduction in methane production with 200 g m−3 alum in the flocculated algae, and a 40% r

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De Leén, C., and D. Jenkins. "Removal of fecal coliforms by thermophilic anaerobic digestion processes." Water Science and Technology 46, no. 10 (2002): 147–52. http://dx.doi.org/10.2166/wst.2002.0314.

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Recent U.S. EPA regulations (40 CFR Section 503) specify maximum concentrations of pathogens and metals for Class A wastewater treatment plant sludges. The most common sludge process is mesophilic (35¡C) digestion which stabilizes the solids, produces a combustible gas but does not create an effluent that meets the 503 Class A pathogen requirements. This investigation was conducted to determine whether anaerobic digestion processes incorporating a thermophilic stage could achieve 503 Class A pathogen levels. The research reported here was a bench-scale screening study meant to identify the mos

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Vallini, G., F. Cecchi, P. Pavan, A. Pera, J. Mata-Alvarez, and A. Bassettit. "Recovery and Disposal of the Organic Fraction of Municipal Solid Waste (MSW) by Means of Combined Anaerobic and Aerobic Bio-Treatments." Water Science and Technology 27, no. 2 (1993): 121–32. http://dx.doi.org/10.2166/wst.1993.0089.

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The paper deals with the semi-dry anaerobic digestion of municipal solid waste followed by composting as finishing treatment of the digested sludge. The integration of the anaerobic and aerobic treatments was studied as approach to close the water balance of the semi-dry anaerobic digestion process and to remove the phytotoxicity of the digested effluent. This study evaluated the response of the anaerobic effluent to the co-composting post-processing step, whether the anaerobic sludge came from mesophilic semi-dry digestion or thermophilic semi-dry nethanization. Evaluation of the strategy ado

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Journal, Baghdad Science. "Laser Improves Biogas Production by Anaerobic Digestion of Cow Dung." Baghdad Science Journal 15, no. 3 (2018): 324–27. http://dx.doi.org/10.21123/bsj.15.3.324-327.

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This study investigates the digestion of cow dung (CD) for biogas production at laboratory scales. The study was carried out through anaerobic fermentation using cow dung as substrate. The digester was operated at ambient temperatures of 39.5 °C for a period of 10 days. The effect of iron powder in controlling the production of hydrogen sulfide (H2S) has been tested. The optimum concentration of iron powder was 4g/L with the highest biogas production. A Q – swatch Nd:YAG laser has been used to mix and homogenize the components of one of the six digesters and accelerate digestion. At the end of

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Méndez-Novelo, Roger Iván, Enrique Abraham Chan-Gutiérrez, Elba René Castillo-Borges, Elizabeth del Rosario Vázquez-Borges, and Arturo Edgardo Espadas-Solís. "Digestión anaerobia de efluentes de fosas sépticas." Ingeniería, investigación y tecnología 13, no. 3 (2012): 339–49. http://dx.doi.org/10.22201/fi.25940732e.2012.13n3.032.

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Vázquez-Padín, J. R., M. Figueroa, I. Fernández, A. Mosquera-Corral, J. L. Campos, and R. Méndez. "Post-treatment of effluents from anaerobic digesters by the Anammox process." Water Science and Technology 60, no. 5 (2009): 1135–43. http://dx.doi.org/10.2166/wst.2009.421.

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The application of the Anammox process was studied under two different approaches for the post-treatment of anaerobic digester supernatants: two independent units, the combined SHARON-Anammox system, performed in a chemostate and a SBR, respectively, and, a single unit system composed by an air pulsing SBR to carry out the CANON process. The technology based on the combination of the SHARON-Anammox process was used to treat the effluent of an anaerobic digester from a fish canning industry. The presence of organic matter in the influent caused fluctuations in the efficiency of the SHARON unit

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Madondo, Nhlanganiso Ivan, Emmanuel Kweinor Tetteh, Sudesh Rathilal, and Babatunde Femi Bakare. "Synergistic Effect of Magnetite and Bioelectrochemical Systems on Anaerobic Digestion." Bioengineering 8, no. 12 (2021): 198. http://dx.doi.org/10.3390/bioengineering8120198.

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Conventionally, the anaerobic digestion of industrial effluent to biogas constitutes less than 65% methane, which warrants its potential methanation to mitigate carbon dioxide and other anthropogenic gas emissions. The performance of the anaerobic digestion process can be enhanced by improving biochemical activities. The aim of this study was to examine the synergistic effect of the magnetite and bioelectrochemical systems (BES) on anaerobic digestion by comparing four digesters, namely a microbial fuel cell (MFC), microbial electrolysis cell (MEC), MEC with 1 g of magnetite nanoparticles (MEC

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van Haandel, Adrianus C. "Influence of the digested cod concentration on the alkalinity requirement in anaerobic digesters." Water Science and Technology 30, no. 8 (1994): 23–34. http://dx.doi.org/10.2166/wst.1994.0374.

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pH value and stability in anaerobic digesters are governed by the carbonic system. An expression is derived to determine the alkalinity requirement for maintaining a desired pH value in an anaerobic digester. The requirement is calculated from stoichiometric relationships and depends on measurable parameters of the influent (notably concentration of digestible material, influent VFA, alkalinity, acidity and organic nitrogen concentration) and operational conditions (temperature, recycle of effluent and/or biogas). The derived expression is applied to three cases of anaerobic digestion: dilute

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Chiamaka Nvene, Joseph Bagi Suleiman, Adekunle A. Ajayi, and Peter Azubuike Ebokaiwe. "Assessment of biogas production potentials of palm oil mill effluent and cow dung substrates in anaerobic digester." World Journal of Advanced Research and Reviews 22, no. 2 (2024): 1279–87. http://dx.doi.org/10.30574/wjarr.2024.22.2.1498.

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The biogas production potentials of palm oil mill effluent (POME) and cow manure (CM) substrates were evaluated using anaerobic digester. The first two digesters (D1 and D2) were charged with POME and CM for mono-digestion respectively. However, co-substrates digestion was done in digesters D3 (60/40 % POME-CM), D4 (70/30 % POME-CM), and D5 (80/20 % POME-CM) and all the digestion lasted for 21 days. The biogas yield of the digesters and performance of the digestions were measured by the analysis of moisture content, pH, total suspended solids (TSS), total solids (TS), volatile solid (VS), chem

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Chiamaka, Nvene, Bagi Suleiman Joseph, A. Ajayi Adekunle, and Azubuike Ebokaiwe Peter. "Assessment of biogas production potentials of palm oil mill effluent and cow dung substrates in anaerobic digester." World Journal of Advanced Research and Reviews 22, no. 2 (2024): 1279–87. https://doi.org/10.5281/zenodo.14688942.

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The biogas production potentials of palm oil mill effluent (POME) and cow manure (CM) substrates were evaluated using anaerobic digester. The first two digesters (D1 and D2) were charged with POME and CM for mono-digestion respectively. However, co-substrates digestion was done in digesters D3 (60/40 % POME-CM), D4 (70/30 % POME-CM), and D5 (80/20 % POME-CM) and all the digestion lasted for 21 days. The biogas yield of the digesters and performance of the digestions were measured by the analysis of moisture content, pH, total suspended solids (TSS), total solids (TS), volatile solid (VS), chem

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Kraemer, Jeremy T., and David M. Bagley. "Simulation of the Impact of Higher Ammonia Recycle Loads Caused by Upgrading Anaerobic Sludge Digesters." Water Quality Research Journal 40, no. 4 (2005): 491–99. http://dx.doi.org/10.2166/wqrj.2005.053.

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Abstract Upgrading conventional single-stage mesophilic anaerobic digestion to an advanced digestion technology can increase sludge stability, reduce pathogen content, increase biogas production, and also increase ammonia concentrations recycled back to the liquid treatment train. Limited information is available to assess whether the higher ammonia recycle loads from an anaerobic sludge digestion upgrade would lead to higher discharge effluent ammonia concentrations. Biowin, a commercially available wastewater treatment plant simulation package, was used to predict the effects of anaerobic di

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Elaiyaraju, P., and N. Partha. "Studies on biogas production by anaerobic process using agroindustrial wastes." Research in Agricultural Engineering 62, No. 2 (2016): 73–82. http://dx.doi.org/10.17221/65/2013-rae.

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This study investigated the effect of factors namely temperature, pH, substrate concentration on sago and tannery effluents by the anaerobic digestion process for biogas production. Response surface methodology with the Central Composite Design (CCD) experiments verified that the biogas production rates were mainly affected by operating temperature, pH, and substrate concentration. The experiments were carried out by two distinct effluents at different organic loading rate under mesophilic range of temperature 31–33°C. Co-digestion was carried out for a period of 21 days. The gas produced was

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Britz, T. J., G. Spangenberg, and C. A. Venter. "Acidogenic microbial species diversity in anaerobic digesters treating different substrates." Water Science and Technology 30, no. 12 (1994): 55–61. http://dx.doi.org/10.2166/wst.1994.0581.

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Microbial species diversity was determined for the acidogenic populations of four different digesters treating landfill leachate, a petrochemical effluent and sewage. The digesters were a downflow fixed-bed, conventional, cold conventional and an upflow hybrid design. The 288 strains isolated from the digesters were characterized using API test systems and identifications confirmed using current taxonomic methods. The taxonomic diversity was determined using the Shannon (H′) and equitability (J′) indices. The species from the four digesters were very similar with the exception of those from th

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Ihara, Ikko, Kiyohiko Toyoda, Tsuneo Watanabe, and Kazutaka Umetsu. "Nitrogen and energy balances of a combined anaerobic digestion and electrochemical oxidation process for dairy manure management." Australian Journal of Experimental Agriculture 48, no. 2 (2008): 208. http://dx.doi.org/10.1071/ea07254.

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Anaerobic digestion and electrochemical oxidation were investigated for their potential to recycle carbon and degrade nitrogen from dairy manure; the energy balance of this combination of treatments was also evaluated. Anaerobic digestion is a sustainable technology that allows recovery of biomass energy and treatment of animal wastes for carbon recycling. Since the anaerobic digestion process performs denitrification poorly, almost all nitrogenous substances are discharged in digested effluent as ammonia. The ammonium nitrogen in anaerobically digested effluent is degraded by electrochemical

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Tilche, A., G. Bortone, G. Forner, M. Indulti, L. Stante, and O. Tesini. "Combination of anaerobic digestion and denitrification in a hybrid upflow anaerobic filter integrated in a nutrient removal treatment plant." Water Science and Technology 30, no. 12 (1994): 405–14. http://dx.doi.org/10.2166/wst.1994.0640.

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A new nutrient removal plant configuration was designed and tested in pilot-scale for the treatment of piggery wastewater. The core of the process is represented by a Hybrid Upflow Anaerobic Filter where both anaerobic digestion and denitrification takes place. The pre-screened piggery wastewater is fed to the mesophilic anaerobic reactor. In the bottom of the sludge bed, anaerobic digestion and sulfate reduction are the prevalent processes. In the upper filter zone, a stream of nitrified clarified effluent is recycled and nitrates are denitrified utilizing the remaining available carbon and s

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Eusébio, Ana, André Neves, and Isabel Paula Marques. "Complementary Substrates-Brewery Wastewater and Piggery Effluent—Assessment and Microbial Community Profiling in a Hybrid Anaerobic Reactor." Applied Sciences 11, no. 10 (2021): 4364. http://dx.doi.org/10.3390/app11104364.

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A hybrid anaerobic reactor was operated under the complementary effluents concept to reduce the unbalanced/inhibitory capacity of the provided piggery effluent. Brewery wastewater was chosen to complement piggery effluent (60:40% v/v, respectively). The HRT reduction from 6.7 to 3.0 days allowed the testing of an organic load increase from 4.5 to 10.0 g COD/L·d, which resulted in the almost doubling of biogas production. Biogas volumes (1.2 and 2.1 L/L·d, respectively) associated with its quality (>77% CH4) revealed that the hybrid anaerobic reactor responded positively to the operational c

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Szelényi, Gábor Z., Róbert Kurdi, Nándor Nemestóthy, Katalin Bélafi-Bakó, and Péter Bakonyi. "Managing the Effluents of Anaerobic Fermentations by Bioprocess Schemes Involving Membrane Bioreactors and Bio-Electrochemical Systems: A Mini-Review." Energies 15, no. 5 (2022): 1643. http://dx.doi.org/10.3390/en15051643.

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Anaerobic bioprocesses, such as anaerobic digestion and dark fermentation, provide energy carriers in the form of methane and hydrogen gases, respectively. However, their wastewater-type residues, that is, the fermentation effluents, must be treated carefully due to the incomplete and non-selective conversion of organic matter fed to the actual system. For these reasons, the effluents contain various secondary metabolites and unutilized substrate, in most cases. Only a fraction of anaerobic effluents can be directly applied for fertilization under a moderate climate. Conventional wastewater tr

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ISMAIL, ISMAFATIN NABILAH, SHAHRUL ISMAIL, and MOHAMED SHAHRIR MOHAMED ZAHARI. "MICROBIAL COMMUNITY PROFILING OF DIGESTED SLUDGE FROM PILOT PLANT BIO-DIGESTER." Universiti Malaysia Terengganu Journal of Undergraduate Research 3, no. 3 (2021): 53–60. http://dx.doi.org/10.46754/umtjur.v3i3.217.

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The production of biogas involves different microbial groups working in a synchronously and closely interactive manner. In Malaysia, biogas production from food waste is an encouraging alternative for sustainable energy production. Therefore, to better understand and optimize process, identification of the microbial community involved in anaerobic digestion (AD) is essential. The purpose of this study is to identify the microbial characteristics under different AD conditions to establish the links between microbial community structure and operational condition efficiency. The pilot plant bio-d

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Charles, W., N. P. Carnaje, and R. Cord-Ruwisch. "Methane conversion efficiency as a simple control parameter for an anaerobic digester at high loading rates." Water Science and Technology 64, no. 2 (2011): 534–40. http://dx.doi.org/10.2166/wst.2011.082.

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The anaerobic digestion process is globally applied to the treatment of highly concentrated wastes such as industrial and rural effluents, and sewage sludge. However, it is known to be relatively unstable. When loaded with high concentrations of organic material, unwanted volatile fatty acids (VFA) are often produced rather than methane (CH4) gas which can lead to digester acidification and failure. This study investigated digester behaviour under high loading rates, testing the usefulness of stoichiometric methane conversion efficiency as a digester control parameter at high loading rates. Ou

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Augoustinos, M. T., T. J. Britz, and R. P. Tracey. "Anaerobic digestion of a petrochemical effluent using an anaerobic hybrid digester." Biotechnology Letters 11, no. 5 (1989): 369–74. http://dx.doi.org/10.1007/bf01024521.

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Usack, Joseph G., Wiratni Wiratni, and Largus T. Angenent. "Improved Design of Anaerobic Digesters for Household Biogas Production in Indonesia: One Cow, One Digester, and One Hour of Cooking per Day." Scientific World Journal 2014 (2014): 1–8. http://dx.doi.org/10.1155/2014/318054.

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A government-sponsored initiative in Indonesia to design and implement low-cost anaerobic digestion systems resulted in 21 full-scale systems with the aim to satisfy the cooking fuel demands of rural households owning at least one cow. The full-scale design consisted of a 0.3 m diameter PVC pipe, which was operated as a conventional plug-flow system. The system generated enough methane to power a cooking stove for∼1 h. However, eventual clogging from solids accumulation inside the bioreactor proved to be a major drawback. Here, we improved the digester configuration to remedy clogging while ma

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Girault, R., P. Rousseau, J. P. Steyer, N. Bernet, and F. Béline. "Combination of batch experiments with continuous reactor data for ADM1 calibration: application to anaerobic digestion of pig slurry." Water Science and Technology 63, no. 11 (2011): 2575–82. http://dx.doi.org/10.2166/wst.2011.594.

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Modelling anaerobic digestion processes is a key aspect of studying and optimizing digesters and related waste streams. However, for the satisfactory prediction of biogas production and effluent characteristics, some parameters have to be calibrated according to the characteristics of the substrates. This article describes a calibration procedure for the IWA ‘Anaerobic Digestion Model no. 1’ applied to the modelling of a digester for treatment of pig slurry. The most sensitive parameters were selected and calibrated combining results from a continuous digester and from batch trials run with th

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Munaf Salih Majeed, Ban Faisal Rasheed, Zaid Ali Hussein, and Hawraa Abdulhadi Salman. "Improving the power performance of microbial fuel cells using UV light." International Journal of Science and Research Archive 12, no. 2 (2024): 2670–74. http://dx.doi.org/10.30574/ijsra.2024.12.2.1588.

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This study investigates the digestion of cow dung (CD) for biogas production at laboratory scales. The study was carried out through anaerobic fermentation using cow dung as substrate. The digester was operated at ambient temperatures of 39.5 °C for a period of 10 days. The effect of iron powder in controlling the production of hydrogen sulfide (H2S) has been tested. The optimum concentration of iron powder was 4g/L with the highest biogas production. A UV light and Q – swatch Nd: YAG laser has been used to mix and homogenize the components of one of the six digesters and accelerate digestion.

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Vineyard, Donald, K. G. Karthikeyan, Christy Davidson, and Phillip Barak. "Improving BioWin Modeling of Phosphorus Solubilization in Acid-Phase Digesters." Environments 11, no. 2 (2024): 31. http://dx.doi.org/10.3390/environments11020031.

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BioWin 6.0 does not accurately predict phosphorus (P) speciation in acidogenic anaerobic digesters under default kinetics characterization and parameterization. The accurate modeling of acid-phase digestion is needed to predict the performance of novel nutrient recovery technologies that act on these digester effluents. The main thrust of this work was to identify and correct the causes of inaccurate P partitioning and precipitation within BioWin models of acid-phase digestion reactors. A BioWin configuration including an organic acid digester was parameterized and recalibrated based on the kn

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Stadterman, K. L., A. M. Sninsky, J. L. Sykora, and W. Jakubowskii. "Removal and inactivation of cryptosporidium oocysts by activated sludge treatment and anaerobic digestion." Water Science and Technology 31, no. 5-6 (1995): 97–104. http://dx.doi.org/10.2166/wst.1995.0572.

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To determine the fate of Cryptosporidium parvum oocysts during wastewater treatment, a model of an activated sludge treatment plant was designed with a flow of 17 ml/min and a detention time of 6 hours. Samples of raw sewage were seeded with oocysts and primary and secondary effluents were analyzed for C. parvum using an immunofluorescent technique. To compare removal efficiencies of oocysts by various wastewater treatment processes, raw sewage, activated sludge, trickling filter and biodisc effluents were seeded with oocysts and settled for 2 hr and for the respective detention times. Sludge

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S., Karthiyayini, Sivabharathy A., Sreehari C., Sreepoorani M., and Vinjth V. "PRODUCTION OF BIOGAS FROM DAIRY WASTE WATER." International Journal of Engineering Research and Modern Education Special Issue, April 2017 (2017): 131–34. https://doi.org/10.5281/zenodo.570964.

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Pollution caused by dairy effluents is a serious problem throughout the world. The major source of waste water is from dairy industry. The effluent from dairy processing unit affects the environment. As a solution our aim is to produce bio-gas from diary wastewater. There are various treatment technologies, among them anaerobic treatment technology is simple and encouraged due to the following advantages such as low cost of construction, pH stability, low maintenance and repair. The biogas is a renewable fuel which can be made using a relatively well known technology. The hazardous pollutants

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McCord, A. I., S. A. Stefanos, V. Tumwesige, et al. "Anaerobic digestion in Uganda: risks and opportunities for integration of waste management and agricultural systems." Renewable Agriculture and Food Systems 35, no. 6 (2019): 678–87. http://dx.doi.org/10.1017/s1742170519000346.

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AbstractMuch of the global population lacks access to basic public sanitation, energy and fertilizers. Micro-scale anaerobic digestion presents an opportunity for low-cost decentralized waste management that creates valuable co-products of renewable energy and organic fertilizer. However, field-based assessments of system performance and clearly articulated guidelines for digestate management and field application are needed. Feedstocks and effluent from seven digesters in Kampala, Uganda were monitored for standard wastewater and fertilizer metrics including indicator organisms (Escherichia c

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