吸附_全程自养脱氮_A_CANON_工艺处理实际市政污水_史勤

中国环境科学2019,39(2)：598~603ChinaEnvironmentalScience吸附-全程自养脱氮(A-CANON)工艺处理实际市政污水史勤,常青龙,谢弘超,张铃敏,赵宇豪,王亚宜*(同济大学环境科学与工程学院,污染控制与资源化研究国家重点实验室,上海污染控制与生态安全研究院,上海200092)摘要：以上海某污水处理厂市政污水为研究对象,考察市政污水在常温(25℃)条件下先经吸附段(A段)去除回收部分碳源后利用全程自养脱氮(CANON)工艺处理的脱氮效果.A-CANON工艺稳定运行175个周期,A段水力停留时间(HRT)=20min,DO=2mg/L,COD去除率始终高于60%,出水C/N降至1.5左右;CANON段出水中COD及TN浓度分别低于50mg/L和15mg/L,NH4+-N浓度一般低于5mg/L,基本满足城市污水厂一级A排放标准.16SrDNA高通量测序结果显示,采用A-CANON工艺后,CANON系统中的优势厌氧氨氧化菌属为Candidatus_Jettenia和Candidatus_Brocadia.其中,Candidatus_Jettenia的丰度由第85周期的1.79%增加到第175周期的13.51%,较同期丰度降低1.4%的Candidatus_Brocadia表现出更强的环境适应能力.研究结果表明采用A-CANON工艺可有效处理市政污水并回收其中碳源.为该工艺在市政污水处理中的应用提供了理论依据和技术支持,有望实现市政污水碳、氮处理的可持续性.关键词：吸附-全程自养脱氮(A-CANON)；市政污水；常温；高通量测序中图分类号：X703.1文献标识码：A文章编号：1000-6923(2019)02-0598-06Theperformanceoftheadsorption(A)-CANONprocesstreatmentmunicipalwastewater.SHIQin,CHANGQing-long,XIEHong-chao,ZHANGLing-min,ZHAOYu-hao,WANGYa-yi*(ShanghaiInstituteofPollutionControlandEcologicalSecurity,StateKeyLaboratoryofPollutionControlandResourcesReuse,CollegeofEnvironmentalScienceandEngineering,TongjiUniversity,Shanghai200092,China).ChinaEnvironmentalScience,2019,39(2)：598~603Abstract：Adsorption(A)-CANONprocesswasproposedtoverifythefeasibilityofusingthisprocesstotreatmunicipalwastewaterfromwastewatertreatmentplants.Theadsorptionunitwasestablishedforthecarbonadsorptionandrecycling,thenthelowC/Nwastewater(effluentoftheAunit)enteredtheCANONunitfortheautotrophicnitrogenremoval.Thisprocessranstablyfor175cyclesandexhibitedrobustcarbonandnitrogenremovals.AtHRT=20minandDO=2mg/L,theremovalefficiencyofCODintheAunitreachedmorethan60%witheffluentC/Ndecliningtoabout1.5.IntheCANONunit,theeffluentCOD,TNandNH4+-Nwerelowerthan50mg/L,15mg/Land5mg/L,respectively,whichbasicallyhavemetthewastewaterdischargestandardforAstandard,firstclass.The16SrDNAhighthroughputsequencingshowedthatthedominantanammoxbacteriawasCandidatus_JetteniaandCandidatus_Brocadia.Candidatus_JetteniacanadaptableforthelowammoniaandnormaltemperatureenvironmentbetterthanCandidatus_Brocadiawhi