Characterization of start-up performance and archaeal community shifts during anaerobic self-degradation of waste-activated sludge |
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Authors: | Takuro Kobayashi Daisuke Yasuda Yu-You Li Kengo Kubota Hideki Harada Han-Qing Yu |
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Affiliation: | 1. Department of Civil and Environmental Engineering, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan;2. Graduate School of Environmental Studies, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan;3. Department of Environmental and Municipal Engineering, Tianjin Institute of Urban Construction, Jinjinggonglu 26, Jitanjin 300384, China;4. School of Chemistry, University of Science and Technology of China, Hefei 230026, China |
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Abstract: | Successful start-up strategy for anaerobic digestion of waste-activated sludge using internal inoculum and relationship between the shift of methanogenic community and the digester performance during start-up was investigated. Combination of TS control of inoculum and batch operation during early days enabled the successful start-up operation without serious volatile fatty acid accumulation, followed by the stable continuous operation. However, the propionate degradation was rate-limiting step during the batch operation. The results of real-time quantitative polymerase chain reaction analysis suggested that there was a correlation between the population of the genus Methanosarcina and the methane production rate coupled with acetate consumption during batch operation, and the results of terminal-restriction fragment length polymorphism (T-RFLP) revealed that the increasing intensity of T-RF peaks of hydrogenotrophic methanogens was associated with a decrease in the level of C3-acids. |
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Keywords: | Anaerobic digestion Start-up Inoculum Archaeal community shift |
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