紊动特性对活性污泥降解污染物性能的影响  

Influence of Turbulence Characteristics on the COD and NH_3-N Degradation Capacity of Activated Sludge System

作　　者：冯骞[1,2] 王超[1,2] 汪翙[2] 

机构地区：[1]河海大学浅水湖泊综合治理与资源开发教育部重点实验室,南京210098 [2]河海大学环境科学与工程学院,南京210098

出　　处：《土木建筑与环境工程》2009年第2期142-147,共6页Journal of Civil,Architectural & Environment Engineering

基　　金：国家“十五“重大科技专项基金资助项目(2003AA601070)

摘　　要：为寻求反映活性污泥处理系统水力条件的微观指标,采用PIV(Particle Image Velocimetry)系统研究了搅拌型SBR反应器中不同转速下反应器内的紊动强度分布。利用不同搅拌浆转速下SBR系统降解污染物性能和絮凝体结构、形态分析结果,研究了搅拌主体区和其他区紊动强度对活性污泥处理系统降解污染物性能的影响,提出了搅拌主体区和其他区紊动强度特征值指标反映活性污泥处理系统的微观水力条件。结果表明:随搅拌浆转速的增加,活性污泥反应器内污染物的降解速率常数则随紊动强度的增加先增加后降低。试验中最佳紊动强度指标为搅拌主体区1.4%,其他区0.34%。活性污泥处理系统中的紊动强度特征值指标反映了水力条件的局部差异;搅拌主体区的紊动强度,对污泥破碎的影响显著;其他区的紊动强度与污泥颗粒的碰撞聚集关系密切。The distribution of turbulence intensity under different rotation speed was analyzed to seek micro indexes reflecting hydraulic conditions of active sludge system by PIV （Particle Image Velocimetry） in a stirring SBR （Sequencing Batch Reactor）. Based on the SBR degradation capacity, flocs structure under different rotating speed of stirring paddle, the influences of turbulence intensity on the degradation capacity were studied, and the indexes of turbulence intensity in the main part of stirring zone and other parts were given. The results show that the specified degradation constant of the pollutants in the active sludge reactor increases firstly and then decreases with the increasing of turbulence intensity. The optimum indexes of turbulence intensity in intensity indexes in the intensity has remarkabl while it has good correl Key Words： turbulence degradation capacity the experiment are 1.4% of main part and 0.34% of other parts. The turbu active sludge system reflect part differences of hydraulic conditions. The turbu ence ence e influence on the breaking up of active sludge in the main part of stirring zone, ation with the collision and gathering of sludge flocs in other parts of the reactor.

关 键 词：紊动强度 活性污泥 COD NH3-N 降解性能 

分 类 号：X703.1[环境科学与工程—环境工程]