Transient performance during start-up of a two-phase anaerobic digestion process demonstration unit treating carbohydrate-rich waste with biochar addition |
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| Affiliation: | 1. Centre for Energy (M473), The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia;2. Department of Agroindustrial Technology, The University of Brawijaya, Jalan Veteran, Malang, East Java, 65154, Indonesia;1. Institute of Environment Pollution Control and Treatment, Zhejiang University, Hangzhou 310058, China;2. Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety, Hangzhou 310058, China;3. Zhejiang Provincial Engineering Laboratory of Water Pollution Control, 388 Yuhangtang Road, Hangzhou 310058, China;1. Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia;2. Department of Engineering Science, Faculty of Science and Technology, Universiti Malaysia Terengganu, 21030 Kuala Terengganu, Terengganu Darul Iman, Malaysia;1. College of Environment and Ecology, Chongqing University, 400045, PR China;2. Material Cycles Division, National Institute for Environmental Studies, Tsukuba 305-8506, Japan;3. School of Environmental Science and Engineering, Nanjing Tech University, Nanjing 211816, PR China;4. College of Environment & Safety Engineering, Fuzhou University, Fuzhou 350108, PR China;1. Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China;2. Guangdong Engineering Research Center of Urban Water Cycle and Environment Safety, Tsinghua University, Shenzhen, 518055, China;3. Shenzhen Lisai Environmental Technology Co, Ltd., Shenzhen, 518055, China;4. School of Environment, Tsinghua University, Beijing, 100084, China;5. Shenzhen Zhonghuanbohong Environmental Technology Co, Ltd., Shenzhen, 518055, China;1. State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science & Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, PR China;2. UN Environment-Tongji Institute of Environment for Sustainable Development, Siping Road, Shanghai 200092, PR China;3. School of Mechanical Engineering, Tongji University, 4800 Caoan Road, Shanghai 201804, PR China |
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| Abstract: | The paper reports an experimental investigation into the transient performance during the start-up of a pilot-scale two-phase anaerobic digestion (TPAD) process demonstration unit (PDU) treating food waste with biochar addition. Hydrogen (H2) was produced in the first phase (R1) and methane (CH4) was produced in the second phase (R2). A fed-batch operation strategy was applied to the start-up of both phases, followed by semi-continuous operation. Production rates and yields of H2 and CH4 and volatile fatty acids (VFA) were measured while the pH and temperature were monitored throughout the process. Fed-batch operation allowed microbe enrichment and gradual VFA production in both phases, which was observed to be efficient in starting up the TPAD PDU. Under semi-continuous operation, R1 produced biogas with composition up to 49% of H2 and at a yield of 46 L H2.kg ?1 VS. CH4 composition and yield reached up to 59% and 301 L CH4.kg?1 VS in the R2. |
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| Keywords: | Biochar Hydrogen Methane Process demonstration unit Two-phase anaerobic digestion |
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