文章以兰州市生活垃圾典型有机组分为原料,进行中温(36℃)批式高固体厌氧消化实验,通过测定消化过程中p H值,VFAs,产气速率等指标,对高固体厌氧消化技术处理生活垃圾可行性和消化特性进行了研究。结果表明,质量比1∶1接种条件下,进料TS...文章以兰州市生活垃圾典型有机组分为原料,进行中温(36℃)批式高固体厌氧消化实验,通过测定消化过程中p H值,VFAs,产气速率等指标,对高固体厌氧消化技术处理生活垃圾可行性和消化特性进行了研究。结果表明,质量比1∶1接种条件下,进料TS浓度15%,20%,25%,30%这4个水平的消化,在60天消化周期内都经历了很长时间的酸化抑制阶段;调节消化系统p H值后,15%和20%的发酵逐步恢复并先后进入了稳定产气阶段,获得了2775 m L·L^(-1)d^(-1)和813 m L·L^(-1)d^(-1)的最大产气效率,累计产气量分别29 L·L^(-1)和14.8 L·L^(-1),原料最大产气潜能为363 m L·g^(-1)VS;25%和30%的发酵在同等操作条件下没有进入产气阶段;兰州市生活垃圾有机组分进料TS浓度在15%~20%之间时,厌氧消化资源化效果最为明显。展开更多
To realize full energy recovery from grass and chicken manure(CM), the integration of high-solid anaerobic digestion(HSAD) and gasification was investigated experimentally. The anaerobic biodegradability of grass can ...To realize full energy recovery from grass and chicken manure(CM), the integration of high-solid anaerobic digestion(HSAD) and gasification was investigated experimentally. The anaerobic biodegradability of grass can be enhanced through codigestion with CM. When the volatile solid(VS) ratio of CM to grass was 20:80, C/N ratio calculated to be 21.70, the cumulative biogas yield was the highest, 237 ml·(g VS)^(-1). The enhancement of biogas production was attributed to the buffering effects of ammonia and rich trace elements in CM. In semi-continuous systems, when the organic loading rate was 4.0 g VS·L^(-1)·d^(-1), the HSAD process was stable, with the average biogas yield 168 ml·(g VS)^(-1). More than 80% fractions of the digestates were volatile matters, which meant that the digestates can be used as feedstock for gasification to produce syngas. The VS ratio of grass to CM had significant overall energy generation through HSAD and gasification. Compared with gasification of digestate,cogasification with woodchips increased syngas yield and low heat value(LHV). Increasing of mass ratio of digestates to woodchips led to the decrease of LHV.展开更多
文摘文章以兰州市生活垃圾典型有机组分为原料,进行中温(36℃)批式高固体厌氧消化实验,通过测定消化过程中p H值,VFAs,产气速率等指标,对高固体厌氧消化技术处理生活垃圾可行性和消化特性进行了研究。结果表明,质量比1∶1接种条件下,进料TS浓度15%,20%,25%,30%这4个水平的消化,在60天消化周期内都经历了很长时间的酸化抑制阶段;调节消化系统p H值后,15%和20%的发酵逐步恢复并先后进入了稳定产气阶段,获得了2775 m L·L^(-1)d^(-1)和813 m L·L^(-1)d^(-1)的最大产气效率,累计产气量分别29 L·L^(-1)和14.8 L·L^(-1),原料最大产气潜能为363 m L·g^(-1)VS;25%和30%的发酵在同等操作条件下没有进入产气阶段;兰州市生活垃圾有机组分进料TS浓度在15%~20%之间时,厌氧消化资源化效果最为明显。
基金Supported by the National Research Foundation,Prime Minister’s Office,Singapore under its Campus for Research Excellence and Technological Enterprise(CREATE)programme
文摘To realize full energy recovery from grass and chicken manure(CM), the integration of high-solid anaerobic digestion(HSAD) and gasification was investigated experimentally. The anaerobic biodegradability of grass can be enhanced through codigestion with CM. When the volatile solid(VS) ratio of CM to grass was 20:80, C/N ratio calculated to be 21.70, the cumulative biogas yield was the highest, 237 ml·(g VS)^(-1). The enhancement of biogas production was attributed to the buffering effects of ammonia and rich trace elements in CM. In semi-continuous systems, when the organic loading rate was 4.0 g VS·L^(-1)·d^(-1), the HSAD process was stable, with the average biogas yield 168 ml·(g VS)^(-1). More than 80% fractions of the digestates were volatile matters, which meant that the digestates can be used as feedstock for gasification to produce syngas. The VS ratio of grass to CM had significant overall energy generation through HSAD and gasification. Compared with gasification of digestate,cogasification with woodchips increased syngas yield and low heat value(LHV). Increasing of mass ratio of digestates to woodchips led to the decrease of LHV.
