摘要
偶氮染料废水具有高CODCr、高色度、有机物成分复杂等特点。根据清污分流的原则 ,确定处理工艺方案为 :首先对高浓度偶氮染料工艺废水采用中和—电解—臭氧氧化进行预处理后 ,再与低浓度废水按比例混合混凝处理。经大量工艺实验确定全流程工艺条件为 :废水pH中性、电解电压 10V、电流密度 0 0 18A cm2 、电解时间 2h ,O3 氧化时间为 2h ,混凝剂环保 1#和 3#浓度各为 2 5 0mg L。CODCr、色度的去除率分别可以达到 99 6 % ,99 9%。可以达标排放。
The wastewater of azo dye is characterized with high COD\-\{Cr\},high colority and complication of organic components. According to the characteristic of the wastewater, the high concentration wastewater of azo dye was firstly pre-treated by neutralization-electrolysis-ozonization process,then was compounded with low concentration wastewater in proportion,and treated by coagulating process.The whole process optimum conditions were determined as follows:pH of neutrality,10 V of electrolysis voltage,0.018 A/cm\+2 of electrical current density,2 h of ozonization, 250 mg/L of environment-protecting coagulant 1\+#,3\+#.The removal rates of COD\-\{Cr\} and colority are 99.6% and 99.9% respectively. The effluent quality can reach requirements of wastewater discharge standards.
出处
《环境科学研究》
EI
CAS
CSCD
北大核心
2001年第3期29-32,共4页
Research of Environmental Sciences
基金
湖南省科委科技项目
关键词
偶氮染料
废水处理
电解
O3氧化
混凝
azo dye
wastewater treatment
electrolysis
ozonization
coagulant
