Improvement of organic acid production with sulfate addition during syngas fermentation using mixed cultures
The aim of this study is to investigate the effect of sulfate on conversion of CO2 into organics using syngas fermentation with mixed culture. Fermentation tests were operated under H2 concentrations of 2.14 and 21.4 mmol/d, respectively, using substrates contained different initial concentrations...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2022-01-01
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| Series: | Water Cycle |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666445322000034 |
| _version_ | 1797987106023276544 |
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| author | Yinbo Xiang Haiping Luo Guangli Liu Renduo Zhang |
| author_facet | Yinbo Xiang Haiping Luo Guangli Liu Renduo Zhang |
| author_sort | Yinbo Xiang |
| collection | DOAJ |
| description | The aim of this study is to investigate the effect of sulfate on conversion of CO2 into organics using syngas fermentation with mixed culture. Fermentation tests were operated under H2 concentrations of 2.14 and 21.4 mmol/d, respectively, using substrates contained different initial concentrations of sulfate (i.e. 0, 2, 4, 6, 8, 10, and 12 mM). The addition of sulfate improved the acetate and formate production, and the enhancement was positively correlated with the sulfate concentrations from 2 to 8 mM. With 8 mM sulfate, the maximum acetate concentrations reached 75.4 ± 4.51 and 76.1 ± 7.77 mM under H2 concentrations of 2.14 and 21.4 mmol/d, respectively, which were 1.47 and 2.58 times higher than those of the treatment without sulfate. The biomass achieved with the sulfate addition was 52%–97% higher than that without sulfate. High-throughput pyrosequencing showed that with the presence of sulfate, Acetobacterium and Desulfovibrio were dominant in the microbial community with high relative abundance of 43% and 38%, respectively. This study suggested that the performance of syngas fermentation could be improved with co-metabolism between homoacetogen and sulfate-reducing bacteria. |
| first_indexed | 2024-04-11T07:43:36Z |
| format | Article |
| id | doaj.art-1697a14e6938448587dbe4e23f4c5a43 |
| institution | Directory Open Access Journal |
| issn | 2666-4453 |
| language | English |
| last_indexed | 2024-04-11T07:43:36Z |
| publishDate | 2022-01-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Water Cycle |
| spelling | doaj.art-1697a14e6938448587dbe4e23f4c5a432022-12-22T04:36:23ZengKeAi Communications Co., Ltd.Water Cycle2666-44532022-01-0132634Improvement of organic acid production with sulfate addition during syngas fermentation using mixed culturesYinbo Xiang0Haiping Luo1Guangli Liu2Renduo Zhang3Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510006, China; Guangdong Provincial Key Laboratory of Petrochemical Pollution Process and Control, Guangdong University of Petrochemical Technology, Maoming, 525000, ChinaGuangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510006, China; Corresponding author. School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510006, China.Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510006, China; Corresponding author.Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510006, ChinaThe aim of this study is to investigate the effect of sulfate on conversion of CO2 into organics using syngas fermentation with mixed culture. Fermentation tests were operated under H2 concentrations of 2.14 and 21.4 mmol/d, respectively, using substrates contained different initial concentrations of sulfate (i.e. 0, 2, 4, 6, 8, 10, and 12 mM). The addition of sulfate improved the acetate and formate production, and the enhancement was positively correlated with the sulfate concentrations from 2 to 8 mM. With 8 mM sulfate, the maximum acetate concentrations reached 75.4 ± 4.51 and 76.1 ± 7.77 mM under H2 concentrations of 2.14 and 21.4 mmol/d, respectively, which were 1.47 and 2.58 times higher than those of the treatment without sulfate. The biomass achieved with the sulfate addition was 52%–97% higher than that without sulfate. High-throughput pyrosequencing showed that with the presence of sulfate, Acetobacterium and Desulfovibrio were dominant in the microbial community with high relative abundance of 43% and 38%, respectively. This study suggested that the performance of syngas fermentation could be improved with co-metabolism between homoacetogen and sulfate-reducing bacteria.http://www.sciencedirect.com/science/article/pii/S2666445322000034Syngas fermentationSulfateOrganics productionHomoacetogenic bacteriaSulfate reducing bacteria |
| spellingShingle | Yinbo Xiang Haiping Luo Guangli Liu Renduo Zhang Improvement of organic acid production with sulfate addition during syngas fermentation using mixed cultures Water Cycle Syngas fermentation Sulfate Organics production Homoacetogenic bacteria Sulfate reducing bacteria |
| title | Improvement of organic acid production with sulfate addition during syngas fermentation using mixed cultures |
| title_full | Improvement of organic acid production with sulfate addition during syngas fermentation using mixed cultures |
| title_fullStr | Improvement of organic acid production with sulfate addition during syngas fermentation using mixed cultures |
| title_full_unstemmed | Improvement of organic acid production with sulfate addition during syngas fermentation using mixed cultures |
| title_short | Improvement of organic acid production with sulfate addition during syngas fermentation using mixed cultures |
| title_sort | improvement of organic acid production with sulfate addition during syngas fermentation using mixed cultures |
| topic | Syngas fermentation Sulfate Organics production Homoacetogenic bacteria Sulfate reducing bacteria |
| url | http://www.sciencedirect.com/science/article/pii/S2666445322000034 |
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