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Volatile fatty acid production from spent mushroom compost: Effect of total solid content
- Fang, Wei, Zhang, Panyue, Gou, Xiying, Zhang, Haibo, Wu, Yan, Ye, Jie, Zeng, Guangming
- International biodeterioration & biodegradation 2016 v.113 pp. 217-221
- acetates, ammonium nitrogen, fermentation, methane production, phosphates, polysaccharides, propionic acid, solubilization, spent mushroom compost, volatile fatty acids
- To improve volatile fatty acids (VFAs) production from spent mushroom compost (SMC), the effect of total solid (TS) content was studied. The protein and polysaccharide solubilization, ammonium (NH4⁺-N) and phosphate (PO4³⁻-P) release, and VFAs production were analyzed. Results showed that the optimal fermentation time was 4 day for VFAs production, longer fermentation time led to VFAs consumption and methane production. Within the TS range from 6% to 18%, a TS of 15% was the optimal for VFAs production, the highest VFAs concentration reached 2781 mg/L, and acetate and propionate acids accounted for about 71% of total VFAs. In addition, the maximum concentration of soluble protein and polysaccharide reached approximately 1648 mg/L and 1394 mg/L, respectively. The NH4⁺-N and PO4³⁻-P release was in a range of 2.11–7.59 mg/gVS and 0.26–1.13 mg/gVS, respectively. If the NH4⁺-N and PO4³⁻-P can be removed, the application of VFAs utilization might be significantly enhanced.