Solid-state anaerobic fermentation of spent mushroom compost for volatile fatty acids production by pH regulation |
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| Authors: | Wei Fang Jie Ye Panyue Zhang Xuefeng Zhu Shungui Zhou |
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| Affiliation: | 1. College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China;2. College of Environmental Science and Engineering, Hunan University, Changsha 410082, China;3. School of Environmental and Material Engineering, Shanghai Second Polytechnic University, Shanghai 201209, China |
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| Abstract: | To enhance volatile fatty acid (VFA) production from spent mushroom compost (SMC), the effect of pH from 4.0 to 12.0 was investigated in this study. The results indicated that higher VFA concentration was achieved under alkaline condition compared to acid condition and control. The maximal VFA concentration was 3479.59 mg/L at a pH of 10.0, which was 50.63% higher than the control without pH control. Acetate accounted for more than 50% of total VFAs in all pH values. The NH4+-N and PO43?-P release was in range of 19.56–27.12 mg/g VS and 3.47–15.76 mg/g VS, respectively. Furthermore, the Logistic-based model could well explained the VFA production in this study. Therefore, alkaline fermentation can be considered a promising technology for VFA production from SMC and the optimal pH should be selected as 10.0. |
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| Keywords: | VFA production Anaerobic fermentation Spent mushroom compost Solid-state pH |
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