Long solid retention time (SRT) has minor role in promoting methane production in a 65°C single-stage anaerobic sludge digester
In this study, a thermophilic (65°C) single-stage wasted activated sludge (WAS) digester was established and the effects of solid retention time (SRT) on the reactor performance were investigated. The result showed that the optimum SRT was 6days with methane yield of 186.16mL/g VS. It was found that...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2020
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/140033 |
| _version_ | 1826117686616129536 |
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| author | Chen, Yun Xiao, Keke Jiang, Xie Shen, Nan Zeng, Raymond J. Zhou, Yan |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Chen, Yun Xiao, Keke Jiang, Xie Shen, Nan Zeng, Raymond J. Zhou, Yan |
| author_sort | Chen, Yun |
| collection | NTU |
| description | In this study, a thermophilic (65°C) single-stage wasted activated sludge (WAS) digester was established and the effects of solid retention time (SRT) on the reactor performance were investigated. The result showed that the optimum SRT was 6days with methane yield of 186.16mL/g VS. It was found that SRT had little effect on the hydrolysis and volatile solids (VS) destruction, and the high temperature employed seemed sufficient to achieve maximum hydrolysis and VS destruction performance. Longer SRT, however, promoted the release of recalcitrant compounds and impaired acidification, leading to the low methane yield. The microbial community analysis revealed that the dominant pathway for methane production was through syntrophic activity of acetate oxidizing bacteria and hydrogenotrophic methanogens while acetoclastic methanogens were absent in the system. |
| first_indexed | 2024-10-01T04:31:22Z |
| format | Journal Article |
| id | ntu-10356/140033 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:31:22Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1400332020-05-26T05:17:48Z Long solid retention time (SRT) has minor role in promoting methane production in a 65°C single-stage anaerobic sludge digester Chen, Yun Xiao, Keke Jiang, Xie Shen, Nan Zeng, Raymond J. Zhou, Yan School of Civil and Environmental Engineering Advanced Environmental Biotechnology Centre Nanyang Environment and Water Research Institute Engineering::Civil engineering Methane Production Solid Retention Time In this study, a thermophilic (65°C) single-stage wasted activated sludge (WAS) digester was established and the effects of solid retention time (SRT) on the reactor performance were investigated. The result showed that the optimum SRT was 6days with methane yield of 186.16mL/g VS. It was found that SRT had little effect on the hydrolysis and volatile solids (VS) destruction, and the high temperature employed seemed sufficient to achieve maximum hydrolysis and VS destruction performance. Longer SRT, however, promoted the release of recalcitrant compounds and impaired acidification, leading to the low methane yield. The microbial community analysis revealed that the dominant pathway for methane production was through syntrophic activity of acetate oxidizing bacteria and hydrogenotrophic methanogens while acetoclastic methanogens were absent in the system. 2020-05-26T05:17:48Z 2020-05-26T05:17:48Z 2017 Journal Article Chen, Y., Xiao, K., Jiang, X., Shen, N., Zeng, R. J., & Zhou, Y. (2018). Long solid retention time (SRT) has minor role in promoting methane production in a 65 °C single-stage anaerobic sludge digester. Bioresource Technology, 247, 724-729. doi:10.1016/j.biortech.2017.09.153 0960-8524 https://hdl.handle.net/10356/140033 10.1016/j.biortech.2017.09.153 30060406 2-s2.0-85030700602 247 724 729 en Bioresource Technology © 2017 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Civil engineering Methane Production Solid Retention Time Chen, Yun Xiao, Keke Jiang, Xie Shen, Nan Zeng, Raymond J. Zhou, Yan Long solid retention time (SRT) has minor role in promoting methane production in a 65°C single-stage anaerobic sludge digester |
| title | Long solid retention time (SRT) has minor role in promoting methane production in a 65°C single-stage anaerobic sludge digester |
| title_full | Long solid retention time (SRT) has minor role in promoting methane production in a 65°C single-stage anaerobic sludge digester |
| title_fullStr | Long solid retention time (SRT) has minor role in promoting methane production in a 65°C single-stage anaerobic sludge digester |
| title_full_unstemmed | Long solid retention time (SRT) has minor role in promoting methane production in a 65°C single-stage anaerobic sludge digester |
| title_short | Long solid retention time (SRT) has minor role in promoting methane production in a 65°C single-stage anaerobic sludge digester |
| title_sort | long solid retention time srt has minor role in promoting methane production in a 65°c single stage anaerobic sludge digester |
| topic | Engineering::Civil engineering Methane Production Solid Retention Time |
| url | https://hdl.handle.net/10356/140033 |
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