The biochemical methane potentials for typical fruit and vegetable waste （FVW） and food waste （FW） from a northern China city were investigated, which were 0.30, 0.56 m3 CH4/kgVS （volatile solids） with biodegrad...The biochemical methane potentials for typical fruit and vegetable waste （FVW） and food waste （FW） from a northern China city were investigated, which were 0.30, 0.56 m3 CH4/kgVS （volatile solids） with biodegradabilities of 59.3% and 83.6%, respectively. Individual anaerobic digestion testes of FVW and FW were conducted at the organic loading rate （OLR） of 3 kg VS/（m3-day） using a lab-scale continuous stirred-tank reactor at 35°C. FVW could be digested stably with the biogas production rate of 2.17 ma/（m3-day） and methane production yield of 0.42 m3 CH4/kg VS. However, anaerobic digestion process for FW was failed due to acids accumulation. The effects of FVW： FW ratio on co-digestion stability and performance were further investigated at the same OLR. At FVW and FW mixing ratios of 2：1 and 1：1, the performance and operation of the digester were maintained stable, with no accumulation of volatile fatty acids （VFA） and ammonia. Changing the feed to a higher FW content in a ratio of FVW to FW 1：2, resulted in an increase in VFAs concentration to 1100-1200 rag/L, and the methanogenesis was slightly inhibited. At the optimum mixture ratio 1：1 for co-digestion of FVW with FW, the methane production yield was 0.49 m3 CH4/kg VS, and the volatile solids and soluble chemical oxygen demand （sCOD） removal efficiencies were 74.9% and 96.1%, respectively.展开更多
文章研究了不同TS混合比(TMR)的牛粪与玉米秸秆在37℃中温条件下混合厌氧消化产沼气性能,动态考察了发酵过程中p H值、日产气量、累计产气量、累计甲烷产量以及TS/VS产气量等指标。结果表明,当牛粪与玉米秸秆TMR值为7∶3时,累积产气量,T...文章研究了不同TS混合比(TMR)的牛粪与玉米秸秆在37℃中温条件下混合厌氧消化产沼气性能,动态考察了发酵过程中p H值、日产气量、累计产气量、累计甲烷产量以及TS/VS产气量等指标。结果表明,当牛粪与玉米秸秆TMR值为7∶3时,累积产气量,TS/VS产气量和TS/VS产甲烷量均高于其它4种比例,产气量和产气品质均为最佳,TS产气量和VS产气量分别为359.61±6.97 m L·g-1和399.15±0.94 m L·g-1。。展开更多
基金supported by the Ministry of Science and Technology of China (No. 2008BADC4B16, 2008BADC4B18,2008AA062401)
文摘The biochemical methane potentials for typical fruit and vegetable waste （FVW） and food waste （FW） from a northern China city were investigated, which were 0.30, 0.56 m3 CH4/kgVS （volatile solids） with biodegradabilities of 59.3% and 83.6%, respectively. Individual anaerobic digestion testes of FVW and FW were conducted at the organic loading rate （OLR） of 3 kg VS/（m3-day） using a lab-scale continuous stirred-tank reactor at 35°C. FVW could be digested stably with the biogas production rate of 2.17 ma/（m3-day） and methane production yield of 0.42 m3 CH4/kg VS. However, anaerobic digestion process for FW was failed due to acids accumulation. The effects of FVW： FW ratio on co-digestion stability and performance were further investigated at the same OLR. At FVW and FW mixing ratios of 2：1 and 1：1, the performance and operation of the digester were maintained stable, with no accumulation of volatile fatty acids （VFA） and ammonia. Changing the feed to a higher FW content in a ratio of FVW to FW 1：2, resulted in an increase in VFAs concentration to 1100-1200 rag/L, and the methanogenesis was slightly inhibited. At the optimum mixture ratio 1：1 for co-digestion of FVW with FW, the methane production yield was 0.49 m3 CH4/kg VS, and the volatile solids and soluble chemical oxygen demand （sCOD） removal efficiencies were 74.9% and 96.1%, respectively.
文摘文章研究了不同TS混合比(TMR)的牛粪与玉米秸秆在37℃中温条件下混合厌氧消化产沼气性能,动态考察了发酵过程中p H值、日产气量、累计产气量、累计甲烷产量以及TS/VS产气量等指标。结果表明,当牛粪与玉米秸秆TMR值为7∶3时,累积产气量,TS/VS产气量和TS/VS产甲烷量均高于其它4种比例,产气量和产气品质均为最佳,TS产气量和VS产气量分别为359.61±6.97 m L·g-1和399.15±0.94 m L·g-1。。
