The use of acidified palm oil mill effluent for thermophilic biomethane production by changing the hydraulic retention time in anaerobic sequencing batch reactor |
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| Affiliation: | 1. Research Centre for Sustainable Process Technology (CESPRO), Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, Bangi, Selangor, Malaysia;2. Chemical Engineering Programme, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, Bangi, Selangor, Malaysia;3. Sime Darby Research Sdn Bhd, Lot 2664, Jalan Pulau Carey, Pulau Carey, 42960, Selangor, Darul Ehsan, Malaysia;1. Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu 610041, China;2. Nanjing Normal University, Nanjing 210023, China;1. Faculty of Engineering Technology, Universiti Malaysia Pahang, Gambang Campus, Kuantan 26300, Malaysia;2. Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia;3. Laboratory for Quantum Semiconductors and Photon-based BioNanotechnology, Department of Electrical and Computer Engineering, Faculty of Engineering, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada;4. Faculty of Chemical and Natural Resource Engineering, Universiti Malaysia Pahang, Gambang Campus, Kuantan, 26300, Malaysia;5. Department of Plant Protection, College of Agriculture, King Saud University, Riyadh, Saudi Arabia;1. Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China;2. College of Engineering (Biomass Engineering Center), China Agricultural University, Beijing 100083, PR China;3. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing 100085, PR China;4. Department of Biochemical Conversion, Deutsches Biomasseforschungszentrum gemeinnützige GmbH (DBFZ), Leipzig 04347, Germany;1. Laboratory for Research on Advanced Processes for Water Treatment, Unidad Académica Juriquilla, Instituto de Ingeniería, Universidad Nacional Autónoma de México, Blvd. Juriquilla 3001, 76230 Querétaro, Mexico;2. Instituto de Ingeniería, Universidad Nacional Autónoma de México, Circuito Escolar, Ciudad Universitaria, 04510 Mexico City, Mexico;3. Department of Biotechnology, Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco 186, Col. Vicentina, 09340 Mexico City, Mexico |
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| Abstract: | The feasibility of thermophilic biomethane production from acidified palm oil mill effluent (POME) was assessed in a 5 L anaerobic sequencing batch reactor (ASBR). The effects of various hydraulic retention time (HRT) (10-1 d) on methane production performance and the stability of ASBR in treating acidified POME were evaluated herein. It was found that the highest methane productivity of 5.65 L CH4/L/d could be attained at HRT of 2 d. However, the removal of chemical oxygen demand (COD) and volatile fatty acid (VFA) at this HRT is rather low (65-62%) hence making it inefficient to operate at HRT 2 d since most of the contaminants remained in the liquid streams. Thus the most recommended HRT was 3 d with maximum methane productivity of 3.96 L CH4/L/d with corresponding methane yield of 260.3 L CH4/kgCODremoved. The COD removal efficiency at 3 d HRT was 71%, and the VFA consumption was more than 80%. The correlation of total VFA: total alkalinity (TVFA: TA) at HRT of 3 d was found to be 0.1. This recommended HRT of 3 is equally shorter than any previously reported application of POME as a substrate for thermophilic biomethane. |
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| Keywords: | HRT Thermophilic ASBR Acidified POME Biomethane |
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