Effect of yeast addition on the biogas production performance of a food waste anaerobic digestion system
Food waste contains numerous easily degradable components, and anaerobic digestion is prone to acidification and instability. This work aimed to investigate the effect of adding yeast on biogas production performance, when substrate is added after biogas production is reduced. The results showed tha...
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| Format: | Article |
| Language: | English |
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The Royal Society
2020-08-01
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| Series: | Royal Society Open Science |
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| Online Access: | https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.200443 |
| _version_ | 1819115638121037824 |
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| author | Ming Gao Shuang Zhang Xinxin Ma Weijie Guan Na Song Qunhui Wang Chuanfu Wu |
| author_facet | Ming Gao Shuang Zhang Xinxin Ma Weijie Guan Na Song Qunhui Wang Chuanfu Wu |
| author_sort | Ming Gao |
| collection | DOAJ |
| description | Food waste contains numerous easily degradable components, and anaerobic digestion is prone to acidification and instability. This work aimed to investigate the effect of adding yeast on biogas production performance, when substrate is added after biogas production is reduced. The results showed that the daily biogas production increased 520 and 550 ml by adding 2.0% (volatile solids; VS) of activated yeast on the 12th and 37th day of anaerobic digestion, respectively, and the gas production was relatively stable. In the control group without yeast, the increase of gas production was significantly reduced. After the second addition of substrate and yeast, biogas production only increased 60 ml compared with that before the addition. After fermentation, the biogas production of yeast group also increased by 33.2% compared with the control group. Results of the analysis of indicators, such as volatile organic acids, alkalinity and propionic acid, showed that the stability of the anaerobic digestion system of the yeast group was higher. Thus, the yeast group is highly likely to recover normal gas production when the biogas production is reduced, and substrate is added. The results provide a reference for experiments on the industrialization of continuous anaerobic digestion to take tolerable measures when the organic load of the feed fluctuates dramatically. |
| first_indexed | 2024-12-22T05:04:22Z |
| format | Article |
| id | doaj.art-51d7cd7a60a84770bc8b95c837f9f9f8 |
| institution | Directory Open Access Journal |
| issn | 2054-5703 |
| language | English |
| last_indexed | 2024-12-22T05:04:22Z |
| publishDate | 2020-08-01 |
| publisher | The Royal Society |
| record_format | Article |
| series | Royal Society Open Science |
| spelling | doaj.art-51d7cd7a60a84770bc8b95c837f9f9f82022-12-21T18:38:09ZengThe Royal SocietyRoyal Society Open Science2054-57032020-08-017810.1098/rsos.200443200443Effect of yeast addition on the biogas production performance of a food waste anaerobic digestion systemMing GaoShuang ZhangXinxin MaWeijie GuanNa SongQunhui WangChuanfu WuFood waste contains numerous easily degradable components, and anaerobic digestion is prone to acidification and instability. This work aimed to investigate the effect of adding yeast on biogas production performance, when substrate is added after biogas production is reduced. The results showed that the daily biogas production increased 520 and 550 ml by adding 2.0% (volatile solids; VS) of activated yeast on the 12th and 37th day of anaerobic digestion, respectively, and the gas production was relatively stable. In the control group without yeast, the increase of gas production was significantly reduced. After the second addition of substrate and yeast, biogas production only increased 60 ml compared with that before the addition. After fermentation, the biogas production of yeast group also increased by 33.2% compared with the control group. Results of the analysis of indicators, such as volatile organic acids, alkalinity and propionic acid, showed that the stability of the anaerobic digestion system of the yeast group was higher. Thus, the yeast group is highly likely to recover normal gas production when the biogas production is reduced, and substrate is added. The results provide a reference for experiments on the industrialization of continuous anaerobic digestion to take tolerable measures when the organic load of the feed fluctuates dramatically.https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.200443food wasteanaerobic digestionwaste bioconversionyeastbiogaspropionic acid inhibition |
| spellingShingle | Ming Gao Shuang Zhang Xinxin Ma Weijie Guan Na Song Qunhui Wang Chuanfu Wu Effect of yeast addition on the biogas production performance of a food waste anaerobic digestion system Royal Society Open Science food waste anaerobic digestion waste bioconversion yeast biogas propionic acid inhibition |
| title | Effect of yeast addition on the biogas production performance of a food waste anaerobic digestion system |
| title_full | Effect of yeast addition on the biogas production performance of a food waste anaerobic digestion system |
| title_fullStr | Effect of yeast addition on the biogas production performance of a food waste anaerobic digestion system |
| title_full_unstemmed | Effect of yeast addition on the biogas production performance of a food waste anaerobic digestion system |
| title_short | Effect of yeast addition on the biogas production performance of a food waste anaerobic digestion system |
| title_sort | effect of yeast addition on the biogas production performance of a food waste anaerobic digestion system |
| topic | food waste anaerobic digestion waste bioconversion yeast biogas propionic acid inhibition |
| url | https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.200443 |
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