镁盐和亚铁盐处理活性染料废水的实验研究  

Dye Wastewater Treatment by Flocculation With Mg-salt and Fe-salt

作　　者：严海琳[1] 汤雯雯[2] 王志良[3] 张显球[2] 杜明霞[2] 贾国正[2] 

机构地区：[1]南京师范大学学报编辑部,江苏南京210009 [2]南京师范大学地理科学学院,江苏南京210042 [3]江苏省环境科学研究院,江苏南京210036

出　　处：《南京师大学报（自然科学版）》2010年第4期72-74,109,共4页Journal of Nanjing Normal University(Natural Science Edition)

基　　金：江苏省环境工程重点实验室开放基金(KF200906)

摘　　要：分别采用镁盐（MgSO4）、亚铁盐（FeSO4）以及镁盐-亚铁盐两级絮凝处理活性染料废水．实验结果表明：单独采用镁盐处理时，适宜的投加量为500mg／L左右，pH为11～12，废水COD去除率达到78％；单独采用亚铁盐处理时，适宜的投加量为400mg／L左右，pH为9，废水EOD去除率达到65％；采用镁盐一亚铁盐两级絮凝，镁盐和亚铁盐适宜的投加量分别为300mg／L和250mg／L时，废水COD去除率达到88％左右，出水的pH在9以下，可满足生物处理或排放对pH的要求．这种两级絮凝不仅强化了废水的处理效果，而且利用了亚铁盐水解呈酸性的特点将废水pH降到9以下，可省去加酸或加碱环节，简化了工艺流程，具有较好实用价值．The characteristics of dye wastewater include being high in COD concentration, high in colourity, difficult in degradation, difficult in biological-treatment. The treatment on dye wastewater is paid much attention in enviromental protection field. In this paper, three floceulation process, namely MgSO4 floeeulation, FeSO4 floeeulation, and Mg- SO4--FeSO4 two-stage flocculation were studied. The results showed ： when MgSO4 and pH were controlled at 500 mg/L and 11 - 12 respectively, COD removal rate was 78% ; when FeSO4 and pH were controlled at 400 mg/L and 9 respectively, COD removal rate was 65% ; and for MgSO4 and FeSO4 two-stage floeeulation, MgSO4 and FeSO4 was controlled at 300 mg/L and 250 mg/L respectively, COD total removal rate was 88%. Therefore, this two-stage floeeulation not only can increase COD removal rate, but also can simplify the whole process, which has good economic value.

关 键 词：染料废水 絮凝 MgSO4 FESO4 

分 类 号：TQ028.8[化学工程]