高浓度染料废水的预处理

PRETREATMENT OF DYES WASTEWATER WITH HIGHER CONCENTRATION

碱性品红，酸性媒介藏青ＲＲＮ，酸性媒介红Ｓ—８０，三种染料废水均具有高ＣＯＤＣｒ、高色度、有机物含量复杂且不易被微生物降解等特点。本实验所用三种染料废水混合后ＣＯＤＣｒ高达３７０００ｍｇ／Ｌ左右，色度高达１０００００倍左右。本实验先将三种废水进行预沉淀等处理，然后按照１０∶１∶１的比例混合，经两级混凝沉淀后，其ＣＯＤＣｒ降至５０００ｍｇ／Ｌ左右，色度降至４０００倍左右。并对其进一步处理做了有意义的尝试。

The dyes wastewater of magenta fuchsine、acid chrome ming blue RRN and acid chrome fast red S-80 are all characterized by high COD Cr ,high colority,complication of organic components, and they are not easy to be biodegrated. COD Cr of the mixed wastewater in this experiment is as high as about 37 000 mg/L, and colority is as high as 100 000 times. In this experiment, these three kinds of dyes wastewater of fuchsine,RRN and S-80 are predeposited individually before being mixed in the ratio of 10∶1∶1. In terms of two steps of coagulation-sedimentation, COD Cr of the mixed wastewater is reduced to about 5 000 mg/g while the colority is reduced to about 4 000 times.Some meaningful experiments were also made for further treatment of these kinds of dyes wastewater.