Anaerobic digestion of excess sludge produced from high rate activated sludge systems

摘要：

　　In this study,the excess sludge from a pilot scale high rate activated sludge (HRAS) system was digested under mesophilic conditions.For this purpose,a laboratory scale digester was operated for 97 days.The digester had a working volume of 6 L and it was operated under 20 days of sludge retention time (SRT).Organic loading rate (OLR) was applied as 3.6 kg COD/m3.day on average throughout the study.The results revealed that volatile solids (VS) and chemical oxygen demand (COD) removal efficiencies were 65% and 70%,respectively.The methane yield of the excess sludge was determined as 0.94 g CODmethane/g TSfed,which was higher when compared to conventional activated sludge (CAS) systems.Therefore,anaerobic digestion of excess sludge from HRAS system could be applied as an alternative in order to obtain energy neutral or energy positive wastewater treatment plant operation.

关键词： Anaerobic digestion energy efficiency high rate activated sludge system methane yield municipal wastewater sludge treatment

作者: Huseyin Guven Mustafa Evren Ersahin Hale Ozgun Recep Kaan Dereli Isa Isik Izzet Ozturk

作者单位: Istanbul Technical University, Civil Engineering Faculty, Environmental Engineering Department, Ayazaga Campus, Maslak 34469, Istanbul, Denmark

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: 703-706

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）