Fenton耦合A/O-MBR工艺体系处理印染废水  

Treatment of Printing and Dyeing Wastewater(PDW) Using Fenton Combined with Anoxic/Aerobic-Membrane Bioreactor(A/O-MBR)

作　　者：张涵 邓风 张璐 周亮 喻学敏[2] 黄纯凯 ZHANG Han;DENG Feng;ZHANG Lu;ZHOU Liang;YU Xuemin;HUANG Chunkai(Environmental Science and Engineering College Nanjing Tech University,211816;Institute of Water Environment and Institute of Environmental Engineering Technology Jiangsu Provincial Academy of Environmental Science,210036,Nanjing,China)

机构地区：[1]南京工业大学环境科学与工程学院,211816 [2]江苏省环境科学研究院水环境研究所与环境工程技术研究所,江苏南京210036

出　　处：《水处理技术》2024年第8期103-109,114,共8页Technology of Water Treatment

基　　金：江苏省自然科学基金-青年基金项目(BK20201091);江苏省研究生科研与实践创新计划项目(SJCX21-0458);江苏省环境工程重点实验室开放课题(ZX2018008)。

摘　　要：近年来,印染行业水处理标准不断提高,印染废水中难降解有机物浓度高、传统缺氧/好氧工艺(A/O工艺)达标难等问题亟待解决。本研究开发了Fenton、A/O工艺与MBR(膜生物反应器)的耦合工艺处理印染废水,开展Fenton+A/O-MBR工艺和A/O-MBR+Fenton工艺对比研究,对反应器中微生物菌群结构进行了初步分析。结果表明,该组合工艺对印染废水中常规污染物均具有良好的去除能力,在水力停留时间(HRT)为72 h条件下,两套工艺对COD的总去除率分别为93%与81%,NH3-N的去除率分别为97.9%与92.2%,表现出高效的除碳脱氮特性。反应器内的微生物16S rRNA多样性结果表明,活性污泥在A/O-MBR系统内仍然可以保持较好的生物种类多样性,前置Fenton预处理对A/O-MBR系统内的异养微生物与氮循环微生物菌群结构产生一定影响,从而造成污染物去除效果的差异。然而,Proteobacteria、Chloroflexi、Bacteroidetes和Planctomycetes是两套A/O-MBR反应器中缺氧和好氧池污泥的优势菌门。In recent years,there has been a continuous improvement in the standard of printing and dyeing wastewater(PDW) treatment.However,it is hard to meet the discharge standards with the traditional anoxic/aerobic process(A/O process) due to the high concentration of refractory organic contaminants in PDW,which become an urgently solved problem.This study aimed to treat actual printing and dyeing wastewater using Fenton + A/O-MBR and A/OMBR + Fenton processes.Meanwhile,the microbial community structure in the reactors was also analyzed.The results indicated that the two combined processes demonstrated efficient treatment performance of PDW.Specifically,the total COD removal efficiencies at a hydraulic retention time(HRT) of 72 h were achieved at 93% and 81% in Fenton + A/O-MBR and A/O-MBR + Fenton systems,respectively.Moreover,the two processes also exhibited great performance in ammonia removal,with ammonia removal efficiencies of 97.9% and 92.2%,respectively.The 16S rRNA pyrosequencing results showed that the activated sludge flocs from two A/O-MBR systems maintained highly diverse microbial communities.The Fenton oxidation pretreatment had significant effects on the structure of heterotrophic microorganisms and nitrogen removal of relevant microorganisms in the A/O-MBR system,leading to different treatment performances.However,the dominant phyla in anoxic and aerobic flocs of two A/O-MBR systems were Proteobacteria,Chloroflexi,Bacteroidetes,and Planctomycetes.Cost analysis shows that the A/O-MBR+Fenton process is superior to the Fenton+A/O-MBR process.

关 键 词：芬顿 A/O-MBR 印染废水 微生物群落 

分 类 号：X791[环境科学与工程—环境工程]