厌氧条件下不同种类污泥的释磷效果

Phosphorus Release Effect of Different Kinds of Sludge under Anaerobic Condition

采用A2O工艺的厌氧池污泥和好氧池污泥,以实际生活污水为处理对象,探讨不同种类污泥在厌氧条件下的释磷情况及其对污水中CODCr的去除效果。结果表明,在420min反应期间,厌氧污泥对污水中CODCr的去除效果总体优于好氧污泥,厌氧和好氧污泥对CODCr的去除率最高分别达到72.5%和50.0%;两种污泥的释磷速率随着反应时间的增加呈下降趋势,释磷量随反应时间的增加呈上升趋势;好氧污泥的释磷效果优于厌氧污泥,且前者的释磷速率大于后者的释磷速率,释磷速率最大值分别为0.26mg·(g·min)^-1,0.09mg·(g·min)^-1;达到相同释磷量时,好氧污泥所用时间短于厌氧污泥。

The anaerobic and aerobic tank sludge of A 2O process were used to treat the actual domestic wastewater, and the phosphorus release and the CODCr removal effect of sewage were discussed in different kinds of sludge under anaerobic condition.The results show that the removal efficiency of CODCr in sewage by anaerobic sludge is better than that of aerobic sludge.During the 420 min reaction, the highest removal rates of CODCr by anaerobic and aerobic sludge are 72.5% and 50.0%, respectively.The phosphorus release rate decrease and the phosphorus release amount increase with increasing reaction time.The phosphorus release effect of aerobic sludge is better than that of anaerobic sludge, and the phosphorus release rate of the former is higher than that of the latter.The maximum phosphorus release rates of anaerobic and aerobic sludge are 0.26 mg·(g· min)^-1 and 0.09 mg·( g·min)^-1 , respectively.When the same amount of phosphorus is released, the time spent on aerobic sludge is less than that of anaerobic sludge.