某污水处理厂活性污泥沉降脱水性能的研究

Study on Activated Sludge Sedimentation and Dewatering Performance of A Sewage Treatment Plant

以污泥沉降特性的参数及各参数之间的规律为研究目标,结果表明当活性污泥的SVI和MLSS分别在110～150,1500～2 000 mg/L时,污泥沉降速度在2～6 min内有很明显的峰值,污泥界面高度变化明显。且在维持污泥沉降性能的前提下,随着污泥SVI(污泥指数)的增大,污泥的MLSS(污泥浓度)值呈递减趋势。具有相同污泥指数的污泥,随着MLSS的增大,污泥比阻呈递减的趋势。

This paper makes the parameters of the sludge settling and their relationships as research objectives.The research shows that when the SVI and MLSS of activated sludge are 110～150,1 500～2 000 mg/L,respectively,the sedimentation velocity reaches the peak in 2～6 min,activated sludge with good settling characteristics and sludge level height changes obviously.In this premise,with the increasing of sludge SVI,the MLSS decreases corresponding,and also with the increasing of MLSS,the specific resistance decreases corresponding.