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| Potential of anaerobic co-digestion of vinegar residue with different ratios of pig and chicken manure |
| Received:October 24, 2018 |
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| KeyWord:anaerobic co-digestion;vinegar;pig manure;chicken manure |
| Author Name | Affiliation | E-mail | | ZHOU Guan-nan | Institute of Urban and Rural Mines, Changzhou University, Changzhou 213100, China | | | CHEN Lin | Institute of Urban and Rural Mines, Changzhou University, Changzhou 213100, China | | | ZHENG Tao | Institute of Urban and Rural Mines, Changzhou University, Changzhou 213100, China
Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China | | | ZHOU Zheng-zhong | Institute of Urban and Rural Mines, Changzhou University, Changzhou 213100, China | | | YUAN Hao-ran | Institute of Urban and Rural Mines, Changzhou University, Changzhou 213100, China
Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China | yuanhr@ms.giec.ac.cn |
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| Abstract: |
| Co-digestion has gained wide attention due to its great compatibility and synergy with raw materials. Vinegar residue is not easily degraded as a single feed under normal anaerobic conditions. Therefore, in this study, it was mixed with pig and chicken manure for codigestion at medium temperature (37℃) to enhance its value. Through a series of systematically designed batch experiments, it was found that the optimum vinegar to pig manure ratio of volatile solids was 1:3, with the final cumulative methane production capacity up to 286.51 mL·g-1VS, demonstrating a synergistic gain of 7.71% in total methane production. The optimum ratio of volatile solids and cumulative methane production for vinegar and chicken manure mixture were 1:3 and 312.57 mL·g-1VS respectively, while the average synergistic gain in the methane production was 2.8%. On the other hand, the effect of co-digestion on the methane concentration in the biogas was insignificant when pig manure was used; and for the case where chicken manure was utilized, the methane concentration decreased with increasing vinegar residue content. Nonetheless, the results demonstrate the synergistic co-digestive effect between vinegar residue and animal manure, suggesting the potential application of anaerobic co-digestion technology to treat vinegar residue. |
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