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Effect of ammonia concentration on hythane (H2 and CH4) production in two-phase anaerobic digestion |
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| Affiliation: | 1. College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, China;2. Zhejiang WangNeng Ecological Science and Technology Co., Ltd, Hangzhou, 310000, China;3. Department of Agricultural Engineering, Faculty of Agriculture, Suez Canal University, Ismailia, 41522, Egypt;1. State Key Laboratory for Oxo Synthesis and Selective Oxidation, National Engineering Research Center for Fine Petrochemical Intermediates, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China;2. College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070, China;1. Saint-Petersburg State University, 7/9 Universitetskaya nab., Saint-Petersburg, 199034, Russia;2. Association of Material Science and Nanotechnologies, 31 Gogol st., Karaganda, 010000, Kazakhstan;3. Institute for Metals Superplasticity Problems, Russian Academy of Sciences, 39 Khalturin st., Ufa, 450001, Russia;4. Air Force Institute of Pilots, 135 Dzerzhinskogo st., Krasnodar, 350090, Russia;5. Institute of Metallurgy of the Ural Branch of the Russian Academy of Sciences, 101 Amundsen st., Ekaterinburg, 620016, Russia;1. Department of Chemical Engineering, Jawaharlal Nehru Technological University Anantapur (JNTUA), Ananthapuramu 515002, Andhra Pradesh, India;2. CSIR-National Environmental Engineering Research Institute (CSIR-NEERI), Nagpur 440 020, Maharashtra, India;3. Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, Uttar Pradesh, India;4. School of Civil and Environmental Engineering, Yonsei University, Seoul 03722, Republic of Korea;5. Institute of Chemical & Environmental Process, Jeonjin Entech Co., Ltd, Busan 46729, Republic of Korea;1. Department of Environmental Engineering, School of Energy and Environmental Engineering, Beijing Key Laboratory on Disposal and Resource Recovery of Industry Typical Pollutants, University of Science and Technology Beijing, Beijing 100083, PR China;2. Tianjin College, University of Science and Technology Beijing, Tianjin 301830, PR China |
| Abstract: | Co-production of hydrogen and methane by two-phase anaerobic digestion (AD) may offer a sustainable solution for the centralized treatment of food waste (FW), while ammonia accumulation is potentially encountered. A mesophilic two-phase AD was investigated for hydrogen and methane production from FW at varying ammonia concentrations. The process achieved a hydrogen yield of 47.7 mL/g VS and a methane yield of 335 mL/g VS by optimizing the organic loading rate (OLR) and recirculation ratio. Total ammonia nitrogen (TAN) concentration of 4044 mg/L corresponded to a threshold in the hydrogen reactor, above which ammonia would initiate inhibition of hydrogenogenesis and acidogenesis. Methane yield was recovered in the methane reactor after acute inhibiting effects of TAN below 5800 mg/L, while TAN above 6200 mg/L caused chronic inhibition of methanogens. Adjusting hydraulic retention time (HRT) and recirculation ratio in hydrogen and methane reactors reduced TAN to 960 and 2105 mg/L respectively, resulting in successful recovery was achieved in the hydrogen reactor but not in the methane reactor. The two-phase AD for methane and hydrogen production can be a promising solution for ammonia accumulation in AD from FW. |
| Keywords: | Anaerobic digestion Ammonia inhibition Hydrogenogenesis Methanogenesis Hythane Food waste Anaerobic digestion"} {"#name":"keyword" "$":{"id":"kwrd0045"} "$$":[{"#name":"text" "_":"AD Hydraulic retention time"} {"#name":"keyword" "$":{"id":"kwrd0055"} "$$":[{"#name":"text" "_":"HRT Organic loading rate"} {"#name":"keyword" "$":{"id":"kwrd0065"} "$$":[{"#name":"text" "_":"OLR Specific hydrogen production"} {"#name":"keyword" "$":{"id":"kwrd0075"} "$$":[{"#name":"text" "_":"SHP Specific methane production"} {"#name":"keyword" "$":{"id":"kwrd0085"} "$$":[{"#name":"text" "_":"SMP Total ammonia nitrogen"} {"#name":"keyword" "$":{"id":"kwrd0095"} "$$":[{"#name":"text" "_":"TAN Volumetric biogas production"} {"#name":"keyword" "$":{"id":"kwrd0105"} "$$":[{"#name":"text" "_":"VBP Volatile fatty acids"} {"#name":"keyword" "$":{"id":"kwrd0115"} "$$":[{"#name":"text" "_":"VFA Volumetric hydrogen production"} {"#name":"keyword" "$":{"id":"kwrd0125"} "$$":[{"#name":"text" "_":"VHP Volumetric methane production"} {"#name":"keyword" "$":{"id":"kwrd0135"} "$$":[{"#name":"text" "_":"VMP |
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