An Investigation of Temperature Downshift Influences on Anaerobic Digestion in the Treatment of Municipal Wastewater Sludge
Operating temperature significantly affects biogas output, process stability, and microbial communities involved in anaerobic digestion. There are several unanswered questions regarding how microbial communities adapt in correlation with biogas production performance, especially when a digester fail...
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| Format: | Article |
| Language: | English |
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Japan Society on Water Environment
2022-01-01
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| Series: | Journal of Water and Environment Technology |
| Subjects: | |
| Online Access: |
https://www.jstage.jst.go.jp/article/jwet/20/5/20_22-056/_pdf
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| _version_ | 1797894373625561088 |
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| author | Gede Adi Wiguna Sudiartha Tsuyoshi Imai |
| author_facet | Gede Adi Wiguna Sudiartha Tsuyoshi Imai |
| author_sort | Gede Adi Wiguna Sudiartha |
| collection | DOAJ |
| description | Operating temperature significantly affects biogas output, process stability, and microbial communities involved in anaerobic digestion. There are several unanswered questions regarding how microbial communities adapt in correlation with biogas production performance, especially when a digester fails to maintain thermophilic conditions. In this study, long-term lab-scale anaerobic digestion was carried out using two fed-batch reactors at 55°C, with subsequent decreases in temperature to 48°C and 45°C. Within the first month of incubation, methane (CH4) production increased by approximately 11.18% following a reduction in temperature from 55°C to 48°C. However, the methane production decreased by 33% after the temperature was downshifted to 45°C. Despite the difference in methane production, the thermophilic methanogen population in both reactors declined significantly in the first month with a temperature decrease. After two months of incubation, these methanogenic communities recovered faster at 48°C than at 45°C, which was highlighted by the rapid colonization of Methanosaeta, Methanobacterium, and Methanothermobacter. Notably, Methanosaeta was the most abundant methanogen under all temperature conditions, indicating its thermotolerance. |
| first_indexed | 2024-04-10T07:07:57Z |
| format | Article |
| id | doaj.art-0bd23fbd711c42269cb59e23e2b68afe |
| institution | Directory Open Access Journal |
| issn | 1348-2165 |
| language | English |
| last_indexed | 2024-04-10T07:07:57Z |
| publishDate | 2022-01-01 |
| publisher | Japan Society on Water Environment |
| record_format | Article |
| series | Journal of Water and Environment Technology |
| spelling | doaj.art-0bd23fbd711c42269cb59e23e2b68afe2023-02-27T01:41:20ZengJapan Society on Water EnvironmentJournal of Water and Environment Technology1348-21652022-01-0120515416710.2965/jwet.22-05610.2965/jwet.22-056An Investigation of Temperature Downshift Influences on Anaerobic Digestion in the Treatment of Municipal Wastewater SludgeGede Adi Wiguna Sudiartha0Tsuyoshi Imai1 Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Ube, Japan Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Ube, Japan Operating temperature significantly affects biogas output, process stability, and microbial communities involved in anaerobic digestion. There are several unanswered questions regarding how microbial communities adapt in correlation with biogas production performance, especially when a digester fails to maintain thermophilic conditions. In this study, long-term lab-scale anaerobic digestion was carried out using two fed-batch reactors at 55°C, with subsequent decreases in temperature to 48°C and 45°C. Within the first month of incubation, methane (CH4) production increased by approximately 11.18% following a reduction in temperature from 55°C to 48°C. However, the methane production decreased by 33% after the temperature was downshifted to 45°C. Despite the difference in methane production, the thermophilic methanogen population in both reactors declined significantly in the first month with a temperature decrease. After two months of incubation, these methanogenic communities recovered faster at 48°C than at 45°C, which was highlighted by the rapid colonization of Methanosaeta, Methanobacterium, and Methanothermobacter. Notably, Methanosaeta was the most abundant methanogen under all temperature conditions, indicating its thermotolerance. https://www.jstage.jst.go.jp/article/jwet/20/5/20_22-056/_pdf anaerobic digestiondownshift temperaturemunicipal wastewater sludgethermotolerant bacteria |
| spellingShingle | Gede Adi Wiguna Sudiartha Tsuyoshi Imai An Investigation of Temperature Downshift Influences on Anaerobic Digestion in the Treatment of Municipal Wastewater Sludge Journal of Water and Environment Technology anaerobic digestion downshift temperature municipal wastewater sludge thermotolerant bacteria |
| title | An Investigation of Temperature Downshift Influences on Anaerobic Digestion in the Treatment of Municipal Wastewater Sludge |
| title_full | An Investigation of Temperature Downshift Influences on Anaerobic Digestion in the Treatment of Municipal Wastewater Sludge |
| title_fullStr | An Investigation of Temperature Downshift Influences on Anaerobic Digestion in the Treatment of Municipal Wastewater Sludge |
| title_full_unstemmed | An Investigation of Temperature Downshift Influences on Anaerobic Digestion in the Treatment of Municipal Wastewater Sludge |
| title_short | An Investigation of Temperature Downshift Influences on Anaerobic Digestion in the Treatment of Municipal Wastewater Sludge |
| title_sort | investigation of temperature downshift influences on anaerobic digestion in the treatment of municipal wastewater sludge |
| topic | anaerobic digestion downshift temperature municipal wastewater sludge thermotolerant bacteria |
| url |
https://www.jstage.jst.go.jp/article/jwet/20/5/20_22-056/_pdf
|
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