铁炭微电解法、Fenton氧化法处理印染废水的效果比较  

Comparison of Iron-carbon microelectrolysis and Fenton oxidation on treatment of dyeing wastewater

作　　者：丁绍兰[1] 汪晶[1] 杜虎[1] 

机构地区：[1]陕西科技大学资源与环境学院,陕西西安710021

出　　处：《西北农林科技大学学报（自然科学版）》2013年第1期97-102,共6页Journal of Northwest A&F University(Natural Science Edition)

基　　金：温州市科技计划项目(H20090027)

摘　　要：【目的】印染废水具有浓度高、色度高、成分复杂、难降解的特点,比较了铁炭微电解法和Fenton氧化法处理印染废水的效果。【方法】以取自陕西咸阳第二印染厂的综合废水为供试材料,通过单因素试验,分别对铁炭微电解法和Fenton氧化法处理印染废水的最佳条件进行了研究,并对二者的处理效果进行了比较。【结果】在处理印染废水时,铁炭微电解法的最佳反应条件为:停留时间30min,进水pH=3～4,铁炭体积比1∶1,此时色度去除率达到80%,COD去除率达到60%;Fenton氧化法的最佳反应条件为:pH=3,停留时间45min,H2O2和FeSO4用量分别为20,25mL/L,H2O2分3次加入,此条件下色度去除率达到79%,COD去除率达到80%。【结论】铁炭微电解法和Fenton氧化法对印染废水均有较好的处理效果,可考虑将两者联合运用,以进一步提高处理效果。[Objective] Dyestuff wastewater is a typical kind of biorefractory wastewater with high con- centration, high chroma, complicated components and low degradability. [Method] Dyeing wastewater from the Second Printing and Dyeing Mill of Xianyang, Shaanxi was chosen as experimental material to study the optimal conditions of for Iron-carbon microelectrolysis and Fenton oxidation using the single-factor experi- ments. The treatment effects of the two methods were compared as well. [Result] In disposing printing and dyeing waste water,optimum reaction conditions of Iron-carbon microelectrolysis were as follows：exposure time was 30 min,pH value was 3--4, volume ratio of iron to carbon was 1, and chroma and COD removal efficiency were 80% and 60% ,respectively. Optimum reaction conditions of Fenton oxidation were as fol- lows：pH value was 3,exposure time was 45 minutes,the dosage of hydrogen peroxide was 20 mL/L and ferrous sulphate was 25 mL/L, the hydrogen peroxide was added in the reaction system three times, and chroma and COD removal efficiency were 79 % and 80 %, respectively. [Conclusion] Treatment of dyeing wastewater by Iron-carbon microelectrolysis and Fenton oxidation showed good effects. It suggests that I- ron-carbon microelectrolysis can be used in combination with Fenton oxidation to improve the treatment ef- ficiency.

关 键 词：印染废水 铁炭微电解法 FENTON氧化法 色度 COD 去除率 

分 类 号：X703[环境科学与工程—环境工程]