水流剪切力对活性污泥特性影响的试验研究  

Experimental study on influence of hydrodynamic shear stress on characteristics of activated sludge

作　　者：冯骞[1] 薛朝霞[1] 汪岁羽[1] 陈丽娜[1] 

机构地区：[1]河海大学环境科学与工程学院,江苏南京210098

出　　处：《河海大学学报（自然科学版）》2006年第4期374-377,共4页Journal of Hohai University(Natural Sciences)

摘　　要：利用SBR反应器模型研究了水流剪切力对活性污泥沉降特性和活性的影响;通过不同水流剪切力下活性污泥絮凝体形态及微生物类型的比较,分析了水流剪切力对活性污泥特性的影响机理.结果表明:SBR系统中的活性污泥对水流剪切力的变化较敏感;剪切力会影响活性污泥的微生物生态系统,改变絮凝体的结构;利用水流剪切力来改变SBR反应器中活性污泥的沉降特性和活性是可行的.Laboratory experiments were performed for study of the influence of hydrodynamic shear stress on the settlement characteristics and activity of activated sludge in SBR system. The influence mechanism of the hydrodynamic shear stress was analyzed by comparison of the morphological characteristics of activated sludge floe and the types of microorganism. The results show that activated sludge in SBR system is sensitive to the variation of hydrodynamic shear stress, and that the shear stress has some influences on the microorganic ecosystem of activated sludge. Therefore, it is feasible to adjust the settlement characteristics and activity of activated sludge in SBR system with hydrodynamic shear stress.

关 键 词：水流剪切力 活性污泥 SBR 污泥絮凝体 

分 类 号：X703[环境科学与工程—环境工程]