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| Effect of mass ratio between sheep manure and vegetable residues on high-solid anaerobic co-digestion |
| Received:February 13, 2018 Revised:April 27, 2018 |
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| KeyWord:sheep manure;vegetable residues;anaerobic co-digestion;high solids;methane |
| Author Name | Affiliation | E-mail | | QI Li-ge-wa | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | ZHANG Ke-qing | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
Scientific Observing and Experimental Station of Dali, Ministry of Agriculture and Rural Affairs, Dali 671004, China | | | TIAN Xue-li | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | ZHAI Zhong-wei | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
Scientific Observing and Experimental Station of Dali, Ministry of Agriculture and Rural Affairs, Dali 671004, China | | | DU Lian-zhu | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
Scientific Observing and Experimental Station of Dali, Ministry of Agriculture and Rural Affairs, Dali 671004, China | | | DING Fei-fei | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | LIANG Jun-feng | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
Scientific Observing and Experimental Station of Dali, Ministry of Agriculture and Rural Affairs, Dali 671004, China | liangjunfeng2008@126.com |
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| Abstract: |
| In order to investigate the effect of the mass ratio of sheep manure to vegetable residues on anaerobic digestion, high-solid anaerobic batch co-digestion of sheep manure and vegetable residues at 1:0, 3:1, 2:1, 1:1, 1:2, 1:3, and 0:1 ratios was carried out at 37℃ with initial organic loading of 45 g VS·L-1. The results showed that the cumulative methane yields based on volatile solids of sheep manure and vegetable residues at 3:1, 2:1, 1:1, 1:2, and 1:3 ratios were 181.6, 158.7, 194.2, 184.6, and 197.2 mL·g-1 VS, respectively, which increased by 7.3%~33.3% compared to that with only sheep manure as the substrate. Compared with only vegetable residues as the substrate, the lag periods of anaerobic digestion (λ)and the time to achieve 90% of the maximum cumulative methane yield (T90)were shortened by 3.2~5.8 d and 2.8~5.4 d, respectively. Synergistic effect analysis of the anaerobic co-digestion showed that synergistic effects existed between anaerobic co-digestion of sheep manure and vegetable residues at the different mass ratios, except for 2:1. For practical project application, a 1:1 substrate mixture of sheep manure to vegetable residues was recommended, as the designed retention time and cumulative methane yield based on volatile solids were 20 d and 194.2 mL·g-1 VS, respectively. |
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