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Ilmasari D, Kamyab H, Yuzir A, Riyadi FA, Khademi T, Al-Qaim FF, Kirpichnikova I, Krishnan S. A Review of the Biological Treatment of Leachate: Available Technologies and Future Requirements for the Circular Economy Implementation. Biochem Eng J 2022. [DOI: 10.1016/j.bej.2022.108605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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2
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Wang Q, Ko JH, Wu H, Liu F, Xu Q. Impact of bottom ash co-disposed with municipal solid waste on geotextile clogging in landfills. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 774:145744. [PMID: 33609839 DOI: 10.1016/j.scitotenv.2021.145744] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 02/03/2021] [Accepted: 02/05/2021] [Indexed: 06/12/2023]
Abstract
Co-disposal of bottom ash (BA) with municipal solid waste (MSW) in landfills is commonly used for BA management. However, BA co-disposal may cause clogging of geotextiles in MSW landfills. This study investigated the effect of different BA co-disposal ratios on geotextile clogging, including MSW, low ash co-disposed (BA_L), high ash co-disposed (BA_H) landfills, and BA mono-fill. Results showed that the BA_L group increased the geotextile clogging by 0.1-0.6 times, compared to that in the MSW landfill. In contrast, the geotextile clogging of the BA_H and BA groups was reduced than that in the MSW landfill. The clogging was in a dynamic process during the experimental period in all the conditions, including chemical clogging and bio-clogging. Moreover, bio-clogging was the main contributor to the geotextile clogging, accounting for 64-83% of the total clogging mass. The BA co-disposal affected the leachate characteristics, such as pH, calcium concentration, and alkalinity, resulting in chemical clogging. When pH was above 7.0, calcium concentration and alkalinity were limiting factors for the calcium carbonate formation. In terms of the bio-clogging, the microbial analysis indicated that different BA co-disposal ratios influenced the diversity and structure of microbial community. These findings could help clarify the effect of BA co-disposal on geotextile clogging, thus useful to landfill operation in practice.
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Affiliation(s)
- Qian Wang
- School of Environment and Energy, Peking University Shenzhen Graduate School, University Town, Xili, Nanshan District, Shenzhen 518055, PR China
| | - Jae Hac Ko
- Department of Environmental Engineering, College of Ocean Sciences, Jeju National University, Jeju Special Self-Governing Province 63243, Republic of Korea
| | - Huanan Wu
- School of Environment and Energy, Peking University Shenzhen Graduate School, University Town, Xili, Nanshan District, Shenzhen 518055, PR China
| | - Feng Liu
- School of Environment and Energy, Peking University Shenzhen Graduate School, University Town, Xili, Nanshan District, Shenzhen 518055, PR China
| | - Qiyong Xu
- School of Environment and Energy, Peking University Shenzhen Graduate School, University Town, Xili, Nanshan District, Shenzhen 518055, PR China.
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Li Y, Ma J, Ren Y, Li Y, Yue D. Calcium leaching characteristics in landfill leachate collection systems from bottom ash of municipal solid waste incineration. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 280:111729. [PMID: 33261989 DOI: 10.1016/j.jenvman.2020.111729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 09/18/2020] [Accepted: 11/22/2020] [Indexed: 06/12/2023]
Abstract
Calcium leaching is a critical factor in the clogging of leachate collection systems (LCS), a phenomenon that affects landfill stability and operation. The bottom ash (BA) of municipal solid waste (MSW) incineration plants contains large quantities of calcium-based compounds. Landfilling is the main disposal method for BA in China that intensifies the consequences of LCS clogging. The factors influencing BA calcium leaching were investigated using simulated leachate. The results showed that fine BA particles, low pH values, high temperature, and ratios of leachate to BA solids were conducive to calcium leaching. Calcium leaching was found to be higher in actual leachate than in simulated leachate. At pH = 5, the cumulative calcium dissolution ratios (CDRs) were 83.36% and 31.49% after 20 days of leaching in the actual and simulated leachate, respectively; at pH = 6, the values were 50.67% and 12.06%, respectively. The introduction of landfill gas could decrease the calcium dissolution and leaching rates. When the ratio of leachate to BA solid was 20:1 mL/g, the accumulative CDR values were 45.98% (pH = 6) and 5.80% (pH = 8) without landfill gases, and 4.59% (pH = 6) and 0.48% (pH = 8) with landfill gases. These results provide the scientific basis for clogging risk prediction with respect to calcium leaching in the LCS of landfills. BA landfilling in old landfill areas with relatively high leachate pH and low chemical oxygen demand, as well as when leachate mixed with an appropriate amount of landfill gases, could be feasible measures to reduce calcium leaching and further prevent clogging in LCS.
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Affiliation(s)
- Yuqian Li
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, No. 19, Xinjiekouwai Street, HaiDian District, Beijing, 100875, PR China.
| | - Junwei Ma
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, No. 19, Xinjiekouwai Street, HaiDian District, Beijing, 100875, PR China.
| | - Yuqing Ren
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, No. 19, Xinjiekouwai Street, HaiDian District, Beijing, 100875, PR China.
| | - Yijia Li
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, No. 19, Xinjiekouwai Street, HaiDian District, Beijing, 100875, PR China.
| | - Dongbei Yue
- School of Environment, Tsinghua University, Beijing, 100084, PR China.
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Begum S, Juntupally S, Anupoju GR, Eshtiaghi N. Comparison of mesophilic and thermophilic methane production potential of acids rich and high-strength landfill leachate at different initial organic loadings and food to inoculum ratios. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 715:136658. [PMID: 32041037 DOI: 10.1016/j.scitotenv.2020.136658] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2019] [Revised: 12/30/2019] [Accepted: 01/10/2020] [Indexed: 06/10/2023]
Abstract
Landfill leachate (LL), which can contaminate both ground and surface water is a major global environmental issue. The aim of the present study was to investigate the biomethane potential (BMP) of a high-strength LL with low pH (5.0), high solids concentration (16%), and high organic matter (170 g/L of chemical oxygen demand (COD); 55 g/L of volatile fatty acids (VFA)) with ammonia nitrogen (NH3-N) (17 g/L). We investigated the BMP of LL at four different initial organic loadings (IOL) of 170 g/L, 85 g/L, 42.5 g/L and 21 g/L of COD and Food to inoculum (F/I) ratios of 0.5; 1; 2 and 3 at mesophilic (35 ± 2 °C) and thermophilic temperatures (55 ± 2 °C). We found that the highest cumulative CH4 could be obtained at an IOL of 42.5 g/L of COD regardless of the F/I ratio and temperature. The highest methane content results in biogas at an IOL of 42.5 g/L were 72% and 74% at mesophilic and thermophilic temperatures respectively. About 80-100% of cumulative methane was produced within 15 days in thermophilic reactors, and 40-72% in mesophilic reactors. The kinetic study revealed a fourfold reduction of lag phase in thermophilic compared to mesophilic reactors. The methane yield and organic matter removal rate increased as the concentration of IOL in LL decreased from 170 g/L to 21 g/L regardless of temperature. There exists an inverse correlation between IOL and organic matter removal efficiency. About 80% COD reduction was obtained at mesophilic temperature, and 90% at thermophilic temperature, at an IOL of 42.5 g/L and 21 g/L of COD. The modified Gompertz model showed a good fit to the experimental data, with R2 > 0.98 in all cases. Overall, the findings of this study conclude that treatment of acids rich and high-strength LL both at mesophilic and thermophilic temperature is feasible at an optimum IOL of 42.5 g/L of COD. However, treatment of LL at thermophilic temperature outperformed compared to mesophilic over the digestion time.
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Affiliation(s)
- Sameena Begum
- Bioengineering and Environmental Sciences Division, EEFF Department, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad 500007, India; Chemical and Environmental Engineering Department, School of Engineering, RMIT University, 124 La Trobe St, Melbourne, VIC 3000, Australia
| | - Sudharshan Juntupally
- Bioengineering and Environmental Sciences Division, EEFF Department, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad 500007, India
| | - Gangagni Rao Anupoju
- Bioengineering and Environmental Sciences Division, EEFF Department, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad 500007, India
| | - Nicky Eshtiaghi
- Chemical and Environmental Engineering Department, School of Engineering, RMIT University, 124 La Trobe St, Melbourne, VIC 3000, Australia.
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Zhao R, Wang X, Chen X, Liu Y. Impacts of different aged landfill leachate on PVC corrosion. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:18256-18266. [PMID: 31041705 DOI: 10.1007/s11356-019-04995-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 03/26/2019] [Indexed: 06/09/2023]
Abstract
Landfill leachate is generally transferred to in situ facilities for advanced treatment by using a pipe system. Because of its harmful and complex compounds, leachate may react with pipe materials, leading to corrosion and scaling. This experimental study uses typical PVC pipe material and investigates its anti-corrosion performance by placing the material samples into different aged leachates. By evaluating the changes in different experimental parameters, including calcium, magnesium, and chloride ion concentration, oxidation-reduction potential, dissolved oxygen, and pH, combined with a characterization of the material properties, we infer the main causes of pipe scaling-corrosion. Results show that the scaling is more intense in the younger leachate, and the concentration of calcium ions is the dominant influencing factor. The scaling might be resulted from joint actions of chemical precipitation and microbial metabolic activities. It is expected the study to provide useful insights into taking effective actions on anti-clogging, and enhance pipes design by selection of appropriate materials for future modification.
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Affiliation(s)
- Rui Zhao
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, 611756, China.
| | - Xiaoqian Wang
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, 611756, China
| | - Xiaolang Chen
- School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China
| | - Yiyun Liu
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, 611756, China
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Wu H, Wang Q, Ko JH, Xu Q. Characteristics of geotextile clogging in MSW landfills co-disposed with MSWI bottom ash. WASTE MANAGEMENT (NEW YORK, N.Y.) 2018; 78:164-172. [PMID: 32559901 DOI: 10.1016/j.wasman.2018.05.032] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 05/07/2018] [Accepted: 05/17/2018] [Indexed: 06/11/2023]
Abstract
As a main byproduct of municipal solid waste incineration (MSWI), bottom ash (BA) has become a big challenge in operating MSWI plants. The most common method for BA treatment is co-disposal with MSW in landfills, which may cause clogging in the leachate collection system (LCS). This research investigated the characteristics of geotextile clogging in landfills with BA co-disposal. The co-disposal of BA changed the characteristics of leachate, especially increasing the concentration of Ca2+. During the experiment, 0.14 g CaCO3 was precipitated in the MSW geotextile, while it increased to 0.52 g CaCO3 in the BA co-disposed geotextile. Based on mass balance of calcium and thermogravimetric (TG) analysis, the formation of biofilm was the main contributor to the mass increment, accounting for about 82% and 57% mass increment in the MSW and BA co-disposed geotextile, respectively. Moreover, CO2 in landfill gas played an important role in the clogging process, including CaCO3 precipitation and biofilm formation. The results suggested that the co-disposal of BA with MSW can increase the risk of geotextile clogging in landfills.
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Affiliation(s)
- Huanan Wu
- Shenzhen Engineering Laboratory for Eco-efficient Polysilicate Materials, School of Environment and Energy, Peking University Shenzhen Graduate School, University Town, Xili, Nanshan District, Shenzhen 518055, PR China
| | - Qian Wang
- Shenzhen Engineering Laboratory for Eco-efficient Polysilicate Materials, School of Environment and Energy, Peking University Shenzhen Graduate School, University Town, Xili, Nanshan District, Shenzhen 518055, PR China
| | - Jae Hac Ko
- Shenzhen Engineering Laboratory for Eco-efficient Polysilicate Materials, School of Environment and Energy, Peking University Shenzhen Graduate School, University Town, Xili, Nanshan District, Shenzhen 518055, PR China
| | - Qiyong Xu
- Shenzhen Engineering Laboratory for Eco-efficient Polysilicate Materials, School of Environment and Energy, Peking University Shenzhen Graduate School, University Town, Xili, Nanshan District, Shenzhen 518055, PR China.
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Begum S, Anupoju GR, Sridhar S, Bhargava SK, Jegatheesan V, Eshtiaghi N. Evaluation of single and two stage anaerobic digestion of landfill leachate: Effect of pH and initial organic loading rate on volatile fatty acid (VFA) and biogas production. BIORESOURCE TECHNOLOGY 2018; 251:364-373. [PMID: 29294458 DOI: 10.1016/j.biortech.2017.12.069] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 12/20/2017] [Accepted: 12/21/2017] [Indexed: 05/28/2023]
Abstract
This work aims to evaluate the impact of pH and initial organic load (IOL) in terms of Chemical Oxygen Demand (COD) of landfill leachate for the production of value added products during single and two stage anaerobic digestion (AD). It was observed that at an optimal IOL of 48 g/L, acetic acid was dominant at pH 5.5 whereas it was butyric acid at pH of 5.5-6.0 and 10-11. The yield of Volatile Fatty Acids (VFA) was dependent on IOL and it was in the range of 0.26 to 0.36 g VFA/(g COD removed). Methane was also harvested during single and two stage AD and found that it was varying in the range of 0.21-0.34 L CH4/(g COD removed) and 0.2-0.32 L CH4/(g COD removed) respectively. An overall increase of 21% COD removal was noticed in two stage AD in comparison to single stage.
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Affiliation(s)
- Sameena Begum
- Bioengineering and Environmental Sciences Group, Environmental Engineering and Fossil Fuels (EEFF) Division, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad 500007, India; School of Engineering, Royal Melbourne Institute of Technology (RMIT), 124 La Trobe St, Melbourne, VIC 3000, Australia
| | - Gangagni Rao Anupoju
- Bioengineering and Environmental Sciences Group, Environmental Engineering and Fossil Fuels (EEFF) Division, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad 500007, India.
| | - S Sridhar
- Membrane Separations Group, Chemical Engineering Department, CSIR- IICT, Tarnaka, Hyderabad 500007, India
| | - Suresh K Bhargava
- School of Science, Royal Melbourne Institute of Technology (RMIT), 124 La Trobe St, Melbourne, VIC 3000, Australia
| | - Veeriah Jegatheesan
- School of Engineering, Royal Melbourne Institute of Technology (RMIT), 124 La Trobe St, Melbourne, VIC 3000, Australia
| | - Nicky Eshtiaghi
- School of Engineering, Royal Melbourne Institute of Technology (RMIT), 124 La Trobe St, Melbourne, VIC 3000, Australia
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Lu X, Chen S, Luo J, Qian G, Liu J, Zhen G, Li YY. Application of a CO2-stripping system for calcium removal to upgrade organic matter removal and sludge granulation in a leachate-fed EGSB bioreactor. RSC Adv 2016. [DOI: 10.1039/c5ra26444h] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The application of a CO2-stripping system for calcium removal to upgrade organic matter removal and sludge granulation in a leachate-fed EGSB bioreactor was evaluated.
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Affiliation(s)
- Xueqin Lu
- School of Environmental and Chemical Engineering
- Shanghai University
- Shanghai 2004444
- PR China
- Department of Civil and Environmental Engineering
| | - Shanping Chen
- Shanghai Environment Engineering Design Institute Co., Ltd
- Shanghai 200232
- P. R. China
| | - Jinghuan Luo
- School of Environmental and Chemical Engineering
- Shanghai University
- Shanghai 2004444
- PR China
| | - Guangren Qian
- School of Environmental and Chemical Engineering
- Shanghai University
- Shanghai 2004444
- PR China
| | - Jianyong Liu
- School of Environmental and Chemical Engineering
- Shanghai University
- Shanghai 2004444
- PR China
| | - Guangyin Zhen
- Center for Material Cycles and Waste Management Research
- National Institute for Environmental Studies
- Tsukuba
- Japan
| | - Yu-You Li
- Department of Civil and Environmental Engineering
- Graduate School of Engineering
- Tohoku University
- Sendai
- Japan
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9
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Choi O, Sang BI. Extracellular electron transfer from cathode to microbes: application for biofuel production. BIOTECHNOLOGY FOR BIOFUELS 2016; 9:11. [PMID: 27034716 PMCID: PMC4717640 DOI: 10.1186/s13068-016-0426-0] [Citation(s) in RCA: 131] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Accepted: 01/05/2016] [Indexed: 05/07/2023]
Abstract
Extracellular electron transfer in microorganisms has been applied for bioelectrochemical synthesis utilizing microbes to catalyze anodic and/or cathodic biochemical reactions. Anodic reactions (electron transfer from microbe to anode) are used for current production and cathodic reactions (electron transfer from cathode to microbe) have recently been applied for current consumption for valuable biochemical production. The extensively studied exoelectrogenic bacteria Shewanella and Geobacter showed that both directions for electron transfer would be possible. It was proposed that gram-positive bacteria, in the absence of cytochrome C, would accept electrons using a cascade of membrane-bound complexes such as membrane-bound Fe-S proteins, oxidoreductase, and periplasmic enzymes. Modification of the cathode with the addition of positive charged species such as chitosan or with an increase of the interfacial area using a porous three-dimensional scaffold electrode led to increased current consumption. The extracellular electron transfer from the cathode to the microbe could catalyze various bioelectrochemical reductions. Electrofermentation used electrons from the cathode as reducing power to produce more reduced compounds such as alcohols than acids, shifting the metabolic pathway. Electrofuel could be generated through artificial photosynthesis using electrical energy instead of solar energy in the process of carbon fixation.
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Affiliation(s)
- Okkyoung Choi
- Department of Chemical Engineering, Hanyang University, 222 Wangshimni-ro, Seongdong-gu, Seoul, 04763 South Korea
| | - Byoung-In Sang
- Department of Chemical Engineering, Hanyang University, 222 Wangshimni-ro, Seongdong-gu, Seoul, 04763 South Korea
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Xia Y, Zhang H, Phoungthong K, Shi DX, Shen WH, Shao LM, He PJ. Leaching characteristics of calcium-based compounds in MSWI Residues: From the viewpoint of clogging risk. WASTE MANAGEMENT (NEW YORK, N.Y.) 2015; 42:93-100. [PMID: 25934218 DOI: 10.1016/j.wasman.2015.04.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Revised: 04/03/2015] [Accepted: 04/07/2015] [Indexed: 06/04/2023]
Abstract
Leachate collection system (LCS) clogging caused by calcium precipitation would be disadvantageous to landfill stability and operation. Meanwhile, calcium-based compounds are the main constituents in both municipal solid waste incineration bottom ash (MSWIBA) and stabilized air pollution control residues (SAPCR), which would increase the risk of LCS clogging once these calcium-rich residues were disposed in landfills. The leaching behaviors of calcium from the four compounds and municipal solid waste incineration (MSWI) residues were studied, and the influencing factors on leaching were discussed. The results showed that pH was the crucial factor in the calcium leaching process. CaCO3 and CaSiO3 began leaching when the leachate pH decreased to less than 7 and 10, respectively, while Ca3(PO4)2 leached at pH<12. CaSO4 could hardly dissolve in the experimental conditions. Moreover, the sequence of the leaching rate for the different calcium-based compounds is as follows: CaSiO3>Ca3(PO4)2>CaCO3. The calcium leaching from the MSWIBA and SAPCR separately started from pH<7 and pH<12, resulting from CaCO3 and Ca3(PO4)2 leaching respectively, which was proven by the X-ray diffraction results. Based on the leaching characteristics of the different calcium compounds and the mineral phase of calcium in the incineration residues, simulated computation of their clogging potential was conducted, providing the theoretical basis for the risk assessment pertaining to LCS clogging in landfills.
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Affiliation(s)
- Yi Xia
- State Key Laboratory of Pollution Control & Resource Reuse, Tongji University, Shanghai 200092, PR China; Institute of Waste Treatment and Reclamation, Tongji University, Shanghai 200092, PR China
| | - Hua Zhang
- State Key Laboratory of Pollution Control & Resource Reuse, Tongji University, Shanghai 200092, PR China.
| | - Khamphe Phoungthong
- State Key Laboratory of Pollution Control & Resource Reuse, Tongji University, Shanghai 200092, PR China; Institute of Waste Treatment and Reclamation, Tongji University, Shanghai 200092, PR China
| | - Dong-Xiao Shi
- Changzhou Domestic Waste Treatment Center, Changzhou 213000, PR China
| | - Wen-Hui Shen
- Changzhou Domestic Waste Treatment Center, Changzhou 213000, PR China
| | - Li-Ming Shao
- Institute of Waste Treatment and Reclamation, Tongji University, Shanghai 200092, PR China; Center for the Technology Research and Training on Household Waste in Small Towns & Rural Area, Ministry of Housing and Urban-Rural Development of PR China (MOHURD), Shanghai 200092, PR China
| | - Pin-Jing He
- Institute of Waste Treatment and Reclamation, Tongji University, Shanghai 200092, PR China; Center for the Technology Research and Training on Household Waste in Small Towns & Rural Area, Ministry of Housing and Urban-Rural Development of PR China (MOHURD), Shanghai 200092, PR China.
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Lins P, Reitschuler C, Illmer P. Development and evaluation of inocula combating high acetate concentrations during the start-up of an anaerobic digestion. BIORESOURCE TECHNOLOGY 2012; 110:167-73. [PMID: 22349198 DOI: 10.1016/j.biortech.2012.01.145] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2011] [Revised: 01/23/2012] [Accepted: 01/24/2012] [Indexed: 05/12/2023]
Abstract
In the present study inocula to combat high acetate (CH(3)COO(-)) concentrations during start-up of an anaerobic digestion were designed and evaluated. Two strategies were followed (i) a stepwise adaptation of the engaged microorganisms within 1, 2, 4 or 6weeks, each at increasing CH(3)COO(-) concentrations of 50, 100, and finally 150mM, and (ii) shock variants, meaning a direct start with 150mM for the same durations. The stepwise adaptation for 4 and 6 weeks resulted in inocula, leading to a significant improved start-up under high CH(3)COO(-) concentrations compared to controls and shock enriched inocula. These results point to the possibility to facilitate the start-up under high CH(3)COO(-) concentrations during anaerobic digestion by addition of specific adapted inocula.
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Affiliation(s)
- Philipp Lins
- University of Innsbruck, Institute of Microbiology, Technikerstr. 25, A-6020 Innsbruck, Austria.
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