活性污泥流变特性主要影响因素及其研究进展

活性污泥作为非牛顿流体,其流变特性对污水处理工艺有着至关重要的影响。而活性污泥流变特性受多种因素影响,其中温度和浓度是最主要的因素,此外污泥的理化特性如表面电荷、EPS、粒径等,以及系统的运行条件如p H、通气量、预处理等也会影响污泥流变特性。这些因素在影响流变特性的同时会影响到传质过程、污泥管道输送以及污泥处理处置工艺等方面。因此,掌握各影响因素对流变特性的影响变化规律具有重要的实际意义。

Main factors infIuencing the rheoIogicaI characteristics of the activated sIudge and its research progress

Being one of the non-newtonian fluids,the rheological characteristics of activated sludge has great influ-ence on the sewage treatment process. The rheological characteristics of activated sludge are affected by many kinds of factors,among which temperature and concentration are the main ones. In addition,the physicochemical charac-teristics,such as surface charge,EPS,particle size,etc.,as well as pH,ventilation volume,pre-treatment,etc. can al-so affect the rheological characteristics of activated sludge. Meanwhile ,these factors can also affect its mass transfer process,pipeline transportation,disposal process of sludge treatment,etc. Therefore,the mastery of the change rules of every influential factor that affects the rheological characteristics is of very important and practical significance.