用于微电子废水预处理的过滤式阴极电芬顿工艺中试  

PILOT-SCALE STUDY ON MEMBRANE-CATHODE ELECTRO-FENTON PROCESS FOR PRETREATMENT OF SEMICONDUCTOR WASTEWATER

作　　者：查文桂 王雪野 王志伟[1] ZHA Wengui;WANG Xueye;WANG Zhiwei(School of Environmental Science and Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]同济大学环境科学与工程学院,上海200092

出　　处：《环境工程》2022年第4期153-158,208,共7页Environmental Engineering

基　　金：国家重点研发计划项目(2019YFC0408200)。

摘　　要：以钢丝网膜组件为阴极构建了过滤式阴极电芬顿工艺,针对微电子废水再生回用预处理开展中试研究。考察了过滤式阴极电芬顿工艺有机物处理潜能,研究了曝气/不曝气、外加电压、Fe^(2+)投加量等运行参数对污染物去除效果及运行费用的影响,在最优工况下开展了连续流中试,并与传统芬顿工艺进行对比。结果表明:过滤式阴极电芬顿工艺能够稳定产生·OH,具备难降解有机物处理潜能。在HRT=120 min条件下,过滤式阴极电芬顿工艺最佳运行工况为:曝气量0.6 m^(3)/h,外加电压3 V,Fe^(2+)投加量0.3 mmol/L。在该工况下处理微电子废水COD、TOC、HO去除率分别为(73.6±18.3)%、(51.2±12.7)%和(83.7±13.0)%,单位COD处理费用为1.93元/g COD,有机物去除效果和运行费用较传统芬顿具有显著优势。A membrane-cathode electro-Fe^(2+)nton process based on cathodic steel mesh membrane module was established and pilot-scale for the pretreatment of semiconductor wastewater reuse was conducted.The organic matters’removal efficiency was investigated,and the operation parameters(including aeration,applied voltage and Fe^(2+)dosage)were also optimized.The continuous-flow pilot-scale experiment was carried out under optimal conditions and then compared with Fe^(2+)nton process.The results showed that the membrane-cathode electro-Fe^(2+)nton process could continuously produce·OH exhibiting high potential in eliminating refractory organic compounds.Under HRT=120 min,the optimal operation parameters were found to be 0.6 m^(3)/h of air flux,3 V of applied voltage and 0.3 mmol/L of Fe^(2+)dosage,with removal rates of COD,TOC and HOat(73.6±18.3)%,(51.2±12.7)%and(83.7±13.0)%,respectively.The corresponding treatment cost per unit COD was RMB 1.93/g COD.In conclusion,the membrane-cathode electro-Fe^(2+)nton process showed higher organic removal rate and lower cost,cimparing to the Fe^(2+)nton process.

关 键 词：电芬顿 微电子废水 高级氧化 预处理 废水回用 

分 类 号：X703[环境科学与工程—环境工程]