内电解SMBR组合工艺处理蒽醌活性染料废水

中国环境科学2011,31(1)：25~31ChinaEnvironmentalScience内电解-SMBR组合工艺处理蒽醌活性染料废水秦磊1,王玮1,张国亮1*,孟琴2(1.浙江工业大学生物与环境工程学院,浙江杭州310014；2.浙江大学材料与化工学院,浙江杭州310027)摘要：采用自制的PVDF中空纤维膜组件构建浸入式膜生物反应器,进行了内电解-SMBR组合工艺处理难降解蒽醌染料(活性艳蓝X-BR)废水的试验.试验分为2组,一组为内电解出水直接进入的SMBR-3,另外一组为内电解出水经调节pH值达9~10后进入的SMBR-4.结果表明,组合工艺中2组SMBR对CODCr、色度和NH4+-N的去除率均很高,且相差不大;但两反应器对TN的去除效果却有明显差异,由于良好生物铁絮体的存在,SMBR-3对TN的去除可高达92.8%,而SMBR-4对TN的去除只有67.5%.与pH值调节后进水相比,内电解直接进水导致活性污泥絮体粒径增大34μm,EPS总量明显增加,且微生物表面结构中有丝状菌出现,菌种也变得相对复杂.对SMBR膜材料进一步检测发现,内电解直接进水所形成的生物铁絮体还可有效减轻膜污染,使膜通量衰减变慢.关键词：内电解；SMBR；活性艳蓝X-BR；活性污泥；膜污染中图分类号：X703.1文献标识码：A文章编号：1000-6923(2011)01-0025-07Combinedinternalelectrolysis/SMBRprocessfortreatmentofreactiveanthraquinonedyewastewater.QINLei1,WANGWei1,ZHANGGuo-liang1*,MENGQin2(1.CollegeofBiologicalandEnvironmentalEngineering,ZhejiangUniversityofTechnology,Hangzhou310014,China；2.CollegeofMaterialandChemicalEngineering,ZhejiangUniversity,Hangzhou310027,China).ChinaEnvironmentalScience,2011,31(1)：25~31Abstract：WastewatercontainingreactivebrilliantblueX-BRanthraquinonedyewastreatedbyinternalelectrolysiscoupledwithsubmergedmembranebioreactor(SMBR),inwhichtheself-madePVDFhollowfibermembranemoduleswereapplied.DuringtheexperimentsperformanceofSMBR-3withinternalelectrolysiswaterdirectlyenteringwascomparedwithSMBR-4inwhichwaterenteredafterregulatingpHto9~10.TheratesofbothtwoSMBRonCODCrandNH4+-Nremovalwerehigh,buttheefficiencyonTNremovalwasverydifferent,inwhichSMBR-3hadahighrateof92.9%comparedtojust67.5%forSMBR-4.ThemeanparticlediameterofactivatedsludgeinSMBR-3was34μmbiggerthanSMBR-4,andthechangeofEPSquantitywasinthesametrend.Someextrafilamentousbacteriainmicroorganismsurfacetexturewereobservedinsolutionwhichpredictedtherelativeintricacyofcultures.Thebio-ferricsludgeforminginSMBR-3wasfoundtobeusefultoalleviatemembranefoulingandmadethefluxdeclinebecomeslower.Keywords：internalelectrolysis；submergedmembranebioreactor(SMBR)；reactivebrilliantblueX-BR；activitysludge；membranefouling印染废水具有有机物成分复杂、浓度高、难降解物质多以及色度高、毒性大、水质变化大等特点,传统方法的处理效果并不理想[1].蒽醌染