铁碳微电解+混凝法预处理高盐染料废水的研究

Treatment of High-salt Dye Wastewater by Iron-carbon Micro-electrolysis+Coagulative Precipitation Process

对高盐染料废水先采用铁碳微电解法进行处理,出水再经过加石灰混凝进行处理.确定了最佳处理条件:微电解反应时间为5h,pH为3,铁碳质量比为1∶2,微电解出水加石灰调节pH值至9左右后混凝沉淀3h.试验结果表明:系统对COD、色度的去除率分别为40.09%和60.1%,废水的可生化性提高到0.32,达到了预处理的效果.

The iron-carbon micro-electrolysis-lime coagulation combined process is used to treat the high-salt dye wastewater.The influence of reaction time,pH,and the volume ratio of iron to carbon is studied.The best treastment conditions are determined.The results show that when the electrolysis reaction time is 5 h,the pH is 3,the volume ratio of iron to carbon in the iron-carbon micro-electrolysis unit is 1∶2,the effluent pH of the micro-electrolysis unit is alkalized to about 9 by lime,and coagulative precipitation is 3 h,then the wastewater COD and color removal rate can reach 40.09% and 60.1%,respectively.The biodegradability of wastewater increases to 0.32,reaching the pretreatment effect.