Sludge Reduction by Electrolysis in Activated Sludge Process
Sludge reduction by electrolysis and its subsequent influence on removal rate of COD, NH3-N, PO43 and on the sludge activity in the aeration tank were investigated. In this research, two parallel sequencing batch reactors were used with one set was operated in convention modality and the sludge of the other set was electrolyzed and then fed back to the reactor. The results showed that: sludge electrolyze could reduce the sludge production around 21% and had slight effect on substrate removal efficiency. After the sludge being electrolyzed, removal rate of COD and NH3-N decreased by 1.1% and 6.9%, respectively. PO43 removal rate increased by 6.1%. The number of protozoa, metazoan and protonema decreased and the structure of sludge floe became more compact. Moreover, the activity of microorganism and carbon source metabolism of sludge changed slightly, but the microbial community structure and metabolic function of microorganism had little change.
CHENG Lihua BI Xuejun LIU Changqing
School of Environmental & Municipal Engineering, Qingdao Technological University, Qingdao,266033, China
国际会议
哈尔滨
英文
296-300
2011-03-26（万方平台首次上网日期，不代表论文的发表时间）