Quorum quenching enhanced methane production in anaerobic systems - performance and mechanisms
In our previous study, quorum quenching (QQ) bacteria can effectively enhance methane production in an anaerobic membrane bioreactor (AnMBR) while mitigating membrane biofouling. However, the mechanism of such enhancement is unclear. In this study, we analyzed the potential effects from separated hy...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2023
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| Online Access: | https://hdl.handle.net/10356/168924 |
| _version_ | 1811693441103429632 |
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| author | Liu, Jianbo Wang, Li Lu, Dan Wu, Dan Zhang, Panyue Zhou, Yan |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Liu, Jianbo Wang, Li Lu, Dan Wu, Dan Zhang, Panyue Zhou, Yan |
| author_sort | Liu, Jianbo |
| collection | NTU |
| description | In our previous study, quorum quenching (QQ) bacteria can effectively enhance methane production in an anaerobic membrane bioreactor (AnMBR) while mitigating membrane biofouling. However, the mechanism of such enhancement is unclear. In this study, we analyzed the potential effects from separated hydrolysis, acidogenesis, acetogenesis and methanogenesis steps. The cumulative methane production improved by 26.13%, 22.54%, 48.70% and 44.93% at QQ bacteria dosage of 0.5, 1, 5 and 10 mg strain/g beads, respectively. It was found that the presence of QQ bacteria enhanced acidogenesis step resulting in higher volatile fatty acids (VFA) production, while it had no obvious influence on hydrolysis, acetogenesis and methanogenesis steps. The substrate (glucose) conversion efficiency in acidogenesis step was also accelerated (1.45 folds vs control within first eight hours). The abundance of hydrolytic fermentation gram-positive bacteria and several acidogenic bacteria, such as Hungateiclostridiaceae, was promoted in QQ amended culture, which enhanced VFA production and accumulation. Although the abundance of acetoclastic methanogen Methanosaeta reduced by 54.2% on the 1st day of QQ beads addition, the overall performance of methane production was not affected. This study revealed that QQ had a greater impact on the acidogenesis step in the anaerobic digestion process, though the microbial community in acetogenesis and methanogenesis steps was altered. This work can provide a theoretical basis for using QQ technology to slow down the rate of membrane biofouling in anaerobic membrane bioreactors while increasing methane production and maximizing economic benefits. |
| first_indexed | 2024-10-01T06:51:43Z |
| format | Journal Article |
| id | ntu-10356/168924 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:51:43Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1689242023-06-22T07:13:36Z Quorum quenching enhanced methane production in anaerobic systems - performance and mechanisms Liu, Jianbo Wang, Li Lu, Dan Wu, Dan Zhang, Panyue Zhou, Yan School of Civil and Environmental Engineering Advanced Environmental Biotechnology Centre (AEBC) Nanyang Environment and Water Research Institute Engineering::Civil engineering Quorum Quenching Methane Production In our previous study, quorum quenching (QQ) bacteria can effectively enhance methane production in an anaerobic membrane bioreactor (AnMBR) while mitigating membrane biofouling. However, the mechanism of such enhancement is unclear. In this study, we analyzed the potential effects from separated hydrolysis, acidogenesis, acetogenesis and methanogenesis steps. The cumulative methane production improved by 26.13%, 22.54%, 48.70% and 44.93% at QQ bacteria dosage of 0.5, 1, 5 and 10 mg strain/g beads, respectively. It was found that the presence of QQ bacteria enhanced acidogenesis step resulting in higher volatile fatty acids (VFA) production, while it had no obvious influence on hydrolysis, acetogenesis and methanogenesis steps. The substrate (glucose) conversion efficiency in acidogenesis step was also accelerated (1.45 folds vs control within first eight hours). The abundance of hydrolytic fermentation gram-positive bacteria and several acidogenic bacteria, such as Hungateiclostridiaceae, was promoted in QQ amended culture, which enhanced VFA production and accumulation. Although the abundance of acetoclastic methanogen Methanosaeta reduced by 54.2% on the 1st day of QQ beads addition, the overall performance of methane production was not affected. This study revealed that QQ had a greater impact on the acidogenesis step in the anaerobic digestion process, though the microbial community in acetogenesis and methanogenesis steps was altered. This work can provide a theoretical basis for using QQ technology to slow down the rate of membrane biofouling in anaerobic membrane bioreactors while increasing methane production and maximizing economic benefits. Nanyang Technological University The authors acknowledge the financial support of Advanced Environmental Biotechnology centre, Nanyang Environment and Water Research Institute (NEWRI), Nanyang Technological University, Singapore. 2023-06-22T07:13:36Z 2023-06-22T07:13:36Z 2023 Journal Article Liu, J., Wang, L., Lu, D., Wu, D., Zhang, P. & Zhou, Y. (2023). Quorum quenching enhanced methane production in anaerobic systems - performance and mechanisms. Water Research, 235, 119841-. https://dx.doi.org/10.1016/j.watres.2023.119841 0043-1354 https://hdl.handle.net/10356/168924 10.1016/j.watres.2023.119841 36913812 2-s2.0-85149899212 235 119841 en Water Research © 2023 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Civil engineering Quorum Quenching Methane Production Liu, Jianbo Wang, Li Lu, Dan Wu, Dan Zhang, Panyue Zhou, Yan Quorum quenching enhanced methane production in anaerobic systems - performance and mechanisms |
| title | Quorum quenching enhanced methane production in anaerobic systems - performance and mechanisms |
| title_full | Quorum quenching enhanced methane production in anaerobic systems - performance and mechanisms |
| title_fullStr | Quorum quenching enhanced methane production in anaerobic systems - performance and mechanisms |
| title_full_unstemmed | Quorum quenching enhanced methane production in anaerobic systems - performance and mechanisms |
| title_short | Quorum quenching enhanced methane production in anaerobic systems - performance and mechanisms |
| title_sort | quorum quenching enhanced methane production in anaerobic systems performance and mechanisms |
| topic | Engineering::Civil engineering Quorum Quenching Methane Production |
| url | https://hdl.handle.net/10356/168924 |
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