城市污水PIAS除磷效果初探

Research of Phosphorus Removal in PIAS

着重介绍 PIAS系统处理城市污水中运行周期 ( T)和曝停比 ( ANR)对除磷效果的影响。本试验采用正交设计安排 ,在污泥浓度 ( MLSS) 5.0～ 6.0 g/l,污泥龄 (θc) 1 2～ 2 0 d,水力停留时间 ( HRT) 5.0～ 6.0 h的条件下 ,当曝气时间为1 .5h,停曝、搅拌时间为 1 .5h,TP的去除率与 T和 ANR的交互效应成正相关 ,而与 T、ANR成负相关。在本试验条件下 ,COD、TN和 TP的去除率已可分别达到 90 .0 2 %、75.91 %、82 .76%。

This paper emphasized on the effects of running-cycle(T) and ANR on the phosphorus removal efficiency in Intermittent Aeration System.Using the orthogonal design,the test condition was achieved:MLSS was 5.0～6.0 g/l,θc was 12～20d,HRT was 5.0～6.0h,running-cycle was 3.0 h in which aeration phase was 1.5h,non-aeration and stirred phase was 1.5h,the removal percentage of TP showed a positive correlation to the interaction effect of T and ANR,and in this test condition,the removal percentage of COD,TN,TP could also approach 90.02%,75.91%,82.76% according to formula(1),(2)and(3).