Oxygen transfer dynamics and activated sludge floc structure under different sludge retention times at low dissolved oxygen concentrations

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• 作者：Haitao Fan^a ; Xiuhong Liu^a ; Hao Wang^a ; Yunping Han^b ; Lu Qi^a ; ^{qilu@ruc.edu.cn} ; Hongchen Wang^a ; ^{whc@ruc.edu.cn}
• 关键词：EPS ; SRT ; Floc structure ; Settling performance ; Low DO
• 刊名：Chemosphere
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：169
• 期：Complete
• 页码：586-595
• 全文大小：2545 K
• 卷排序：169

文摘

Oxygen diffusion feature was explored in microenvironment of floc by microelectrodes. Activated sludge properties in combination with nutrient removal efficiency were investigated under different SRTs at low DO conditions. Reactors with long SRTs were less sensitive to low DO concentrations. EPS increased the oxygen mass transport resistance in the floc. Settling performance of activated sludge improved with longer SRTs.