钱塘江原水水厂生产尾水的水质特点及回用探讨

Discussion on water quality characteristics and reuse of wastewater from water plant of Qiantang River

水厂的生产尾水来源于沉淀池的排泥水及各类滤池的反冲洗水,不同的地区对生产尾水有不同的处理方式。介绍了某水务以钱塘江为水源的生产尾水的水质特点,并对是否回用进行了探讨。结果显示:浓缩池上清液浊度、SS、pH、总氮、总磷、Fe等指标与原水相差不大,用于回用时对原水的影响不大,耗氧量、锌等指标稍大于原水,用于回用需要加以关注,氨氮、粪大肠菌群、Mn等指标远大于原水,表现出明显的富集效应,用于回用需要重点关注。离心机滤液的有机物、氨氮、丙烯酰胺单体等指标检测出较高的含量,不建议回用。

The production wastewater of water treatment plant is from the drainage of sendmentation tank and the backwash water of all kinds of filters.There are different kinds of treatment methods for this water.In this paper,the water quality characteristics of the production wastewater for qiantang River in Hangzhou Water Group was introduced and whether it was fit for recycling was also discussed.The results showed that the turbidity,SS,TN,TP and Fe in supernatant of concentration tank had no difference from the raw water.So they have no impact on reusing.The concentration of CODMn,Zn were higher than the raw water and it should be concerned.The NH3-N,fecal coliform,Mn were much higher than the raw water and showed obvious enrichment effect,and they need to be focused on.The concentration of CODMn,NH3-N,PAM and other indicators of the centrifuge filtrate have detected higher,it is not fit for reusing.