净水厂滤池反冲洗废水回用的试验研究

通过实验室烧杯试验，将滤池反冲洗废水直接与原水按一定比例混合进行混凝试验。采用聚合氯化铝PAC为混凝剂，在投量为60mg／L的条件下，对色度、浊度、CODMn及UV254的去除效果进行了考察。试验结果表明：反冲洗废水可以提高对原水浊度和色度的去除，不会提高出水的有机物含量。同时结果也显示，投加10％反冲洗废水不仅可以回收水量，而且可以达到改善混凝性能、提高混凝效率、减少混凝成本的目的，可以为水厂的运行提供参考。但是回收滤池反冲洗水明显提高了滤后水中细菌总数，给后续消毒工艺提出了更高的要求。

Experimental Study on Recycling and Reuse of Filter Backwash Wastewater in Water Treatment Plant

The batch tests were carried out to treat filter backwash wastewater,which was directly added to raw water based on different ratios.As a result,filter backwash wastewater can enhance the removal of turbidity and color from raw water, but has no positive effect on organic matter.At the same time,10% of filter backwash wastewater can decrease some dosage and improve coagulation efficiency. It is noticed that filter backwash wastewater increases total bacteria after filter,which results in stricter disinfecti...