Mitigation of volatile fatty acid inhibition on anaerobic digestion from kitchen wastes via ammonia control

摘要：

　　In recent years,a great deal of attention has been paid in increase of efficient anaerobic digestion on the treatment for kitchen wastes,which may decline environmental pollution and achieve energy regeneration combining biogas prouction.However,volatile fatty acid (VFA) inhibition on anaerobic digestion process is hardly avoided under high-solid conditions.Ammonia prevents pH drop,which is also toxic to anaerobic digestion system,at different degrees with a wide concentration range.This study attempts to relieve VFA inhibition through controlling ammonia concentration.The results showed that the anaerobic digestion system with an ammonia content of 1,500 mg L-1 improved VFA inhibition efficiently.Relative to control,more than 7.3% methane,a stable pH between 6.8 and 7.2,and less VFA accumulation were achieved in this system,suggesting greater recovery of methanogenic activity than its toxicity.

关键词： Kitchen wastes Anaerobic digestion VFA inhibition Ammonia

作者: Zhiyang Xu Mingxing Zhao Hengfeng Miao Zhenxing Huang Wenquan Ruan

作者单位: School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China;Jiangsu Key Laboratory of Anaerobic Biotechnology, Jiangnan University, Wuxi 214122, China

会议类型: 国际会议

会议名称: The 15th IWA World Conference on Anaerobic Digestion( 第15届IWA世界厌氧大会)

会议地点: 北京

会议语种:英文

页码: 181-184

在线出版日期: 2017-10-17（万方平台首次上网日期，不代表论文的发表时间）