废水中磺胺甲噁唑在A_O_MBR工艺中的去除机理_赵亚奇

废水中磺胺甲口恶唑在A/O－MBＲ工艺中的去除机理赵亚奇，温沁雪，杨莲，陈志强，岳秀丽(哈尔滨工业大学城市水资源与水环境国家重点实验室，黑龙江哈尔滨150090)摘要:抗生素药物在医院污水中广泛存在，传统的处理工艺对其未能妥善拦截，这些抗生素被排入城市污水厂后，将引起耐药菌及相应抗性基因的传播，进而影响水环境生态安全。为降低对城镇受纳水体的生态危害，揭示废水中磺胺甲口恶唑(SMX)的去除机理，采用梯度驯化与批次试验的方法，分析磺胺甲口恶唑对A/O－MBＲ工艺的影响及其降解、吸附和水解情况。结果表明，SMX对COD、氨氮的去除影响较小。SMX浓度的提高，会在短期内抑制反硝化活性，从而引起TN去除效果的波动。抗生素浓度从零逐步升高至3mg/L时，厌氧释磷速率下降了46．65%，造成TP去除率下降29．16%。反应器经过一定的驯化后可对SMX产生较好的去除能力，SMX浓度从0．5mg/L提高至1mg/L以后，其去除率均在95%以上。生物降解是SMX的主要去除途径，吸附、水解作用对于SMX的去除贡献不足千分之一。关键词:A/O－MBＲ工艺;磺胺甲口恶唑;活性污泥;生物降解中图分类号:X703文献标识码:A文章编号:1000－4602(2017)17－0026－06基金项目:国家水体污染控制与治理科技重大专项(2014ZX07305001－005);城市水资源与水环境国家重点实验室自主课题(2015TS04)通信作者:温沁雪E－mail:wqxshelly@163．comＲemovalPrincipalofSulfamethoxazoleinWastewaterTreatmentinA/O－MBＲZHAOYa-qi，WENQin-xue，YANGLian，CHENZhi-qiang，YUEXiu-li(StateKeyLaboratoryofUrbanWaterＲesourceandEnvironment，HarbinInstituteofTechnology，Harbin150090，China)Abstract:Antibioticsexistcommonlyinhospitalsewageandconventionalprocessisnotefficientinantibioticsremoval．Antibioticsthatenteredthemunicipalsewageplantwillcausethespreadofantibi-oticsresistantbacteriaandresistancegenes，whichthreatensecologicalsecurityofwaterenvironment．InordertoreduceecologicalrisktoreceivingwatersandinvestigatethemigrationandtransformofSMXinA/O－MBＲ，gradientacclimationandbatchexperimentswereusedinthisresearch．Possibleremovalpathwayslikebiodegradation，adsorptionandhydrolysisofsulfamethoxazoleintheA/O－MBＲwereana-lyzed．TheresultsshowedthatSMXhadlittleeffectonCODandammoniaremoval．TheincreaseofSMXconcentrationwouldinhibittemporarilythedenitrificationactivity，whichresultedinthefluctuationinTNremoval．Whentheconcentrationofantibioticsincreasedfrom0to3mg/L，therateofanaerobicphos-phorusreleasedecreasedby46．65%，resultinginadecreaseofTPremovalefficiencyby29．16%．TheA/O－MBＲsystemshowedagoodabilitytoremoveSMXafteraproperacclimation，theaverageremovalefficiencykeptabove95%despiteoftheincreaseofSMXconcentration．Biodegradationwasthemain·62·第33卷第17期2017年9月中国给水排水CHINAWATEＲ＆WASTEWATEＲVol．33No．17Sep．2017wayforSMXremoval，whileadso