Pretreatment of municipal landfill leachate by a combined process |
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| Authors: | K.W. Pi Z. Li D.J. Wan L.X. Gao |
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| Affiliation: | 1. School of Chemical and Environmental Engineering, Hubei University of Technology, Wuhan, Hubei 430068, China;2. Cleaner Production Center of Hubei Province of China, Wuhan, Hubei 430068, China;1. School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China;2. Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, Hangzhou 310012, China;3. Zhejiang Zone-King Environmental Science and Technology Co., Ltd., 7F Zhejiang Sanli Times Square, No. 536 Shaoxin Road, Hangzhou 310013, China;1. Department of Civil and Environmental Engineering, Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, Beijing Jiaotong University, Beijing 100044, China;2. Xiaping Municipal Solid Waste Landfill Plant, Shenzhen 518000, Guangdong Province, China;3. China Construction Technology Consulting Co. LTD Beijing 100044, China;1. Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia;2. Department of Chemical and Environmental Engineering, Faculty of Engineering, University of Nottingham Malaysia Campus, Jalan Broga, 43500, Semenyih, Selangor Darul Ehsan, Malaysia;3. Nanotechnology & Catalysis Research Centre, Deputy Vice Chancellor (Research & Innovation) Office, University of Malaya, 50603, Kuala Lumpur, Malaysia;4. Research Center for Energy Technology and Strategy, National Cheng Kung University, Tainan, 701, Taiwan;5. Department of Chemical Engineering, National Cheng Kung University, Tainan, 701, Taiwan;6. Research Centre for Circular Economy, National Cheng Kung University, Tainan, 701, Taiwan;7. College of Engineering, Tunghai University, Taichung, 407, Taiwan;8. Department of Civil Engineering, Faculty of Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia;9. School of Chemical Sciences, University of Science, Malaysia, 11800, Pulau Pinang, Malaysia;10. School of Energy and Chemical Engineering, Xiamen University Malaysia, 43900, Sepang, Malaysia;1. LIWET, Department of Industrial Biological Sciences, Ghent University, Campus Kortrijk, Graaf Karel de Goedelaan 5, B-8500 Kortrijk, Belgium;2. BIOMATH, Department of Mathematical Modeling, Statistics and Bioinformatics, Ghent University, Gent, Belgium;3. EnVOC, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium;4. Kenya Industrial Research and Development Institute (KIRDI), P.O. Box 30650-00100, Nairobi, Kenya |
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| Abstract: | Biodegradability enhancement of landfill leachate using air stripping followed by coagulation/ultrafiltration (UF) processes was introduced. The air stripping process obtained a removal efficiency of 88.6% for ammonia nitrogen (NH4–N) at air-to-liquid ratio of 3500 (pH 11) for stripping 18 h. The single coagulation process increased BOD/COD ratio by 0.089 with the FeCl3 dosage of 570 mg l?1 at pH 7.0, and the single UF process increased the BOD/COD ratio to 0.311 from 0.049. However, the combined process of coagulation/UF increased the BOD/COD ratio from 0.049 to 0.43, and the final biological oxygen demand (BOD), chemical oxygen demand (COD), NH4–N and colour of leachate were 1223.6 mg l?1, 2845.5 mg l?1, 145.1 mg l?1 and 2056.8, respectively, when 3 kDa molecular weight cut-off (MWCO) membrane was used at the operating pressure 0.7 MPa. In ultrafiltration process, the average solution flux (JV), concentration multiple (MC) and retention rate (R) for COD was 107.3 l m?2 h?1, 6.3% and 84.2%, respectively. |
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