Abstract:

The influence of reusing V-filter backwashing water directly on the water quality of waterworks plants have been studied. The results show that the reused V-filter backwashing wastewater is beneficial to the removal of turbidity of the settled water. When the reuse ratio is less than 10%,the turbidity of the settled water shows a downward trend.And at the same time of backwashing water reuse,the COD_Mn of the settled water may decrease,and a slight decrease of the UV₂₅₄ of the settled water also appears. It is noticed that the total bacteria in the settled water increases remarkably,when the reuse ratio of filter backwashing water is more than 10%. At the end,by means of mathematical method,it is verified that the best reuse ratio of the backwashing water in the waterworks plant is 3%-10%.

Key words: filter, backwashing water, coagulation, sedimentation

摘要：

研究了V型滤池反冲洗水直接回用对给水厂水质的影响。结果表明:回用滤池反冲洗废水有利于对沉后水浊度的去除，回用比例小于10%时，沉后水浊度呈下降趋势。回用反冲洗水同时会降低沉后水CODMn，还可以小幅度降低沉后水的UV254。当滤池反冲洗水回用比例大于10%时，沉后水中细菌总数有明显提高。最后通过数学方法确定了水厂反冲洗水的最佳回用比为3%~10%。

关键词: 滤池, 反冲洗废水, 混凝, 沉淀

CLC Number: 

• TU991.2