净水技术2023,42(2):185-190WaterPurificationTechnology刘培志,汪辉.污水进水低碳氮比的总氮应急处理技改实践[J].净水技术,2023,42(2):185-190.LIUPZ,WANGH.TechnicalreconstructionforTNemergencyremovalunderlowC/Ninfluent[J].WaterPurificationTechnology,2023,42(2):185-190.污水进水低碳氮比的总氮应急处理技改实践刘培志,汪辉∗(武汉新天达美环境科技股份有限公司,湖北武汉430000)摘要国内早期建设的大部分城镇污水处理厂,由于资金投入相对缺乏,设计时未考虑总氮(TN)的去除,此外,其工艺设计过于简单,设备设施简陋,且投运时间久远。为满足日益严格的环境保护监管要求,部分污水厂需在有限条件下进行技术改造。针对部分污水厂水量不足、碳氮比严重失调易导致出水TN超标的情况,本项目通过现场技改试验,研究进一步削减TN的措施。试验结果表明,在污水厂进水化学需氧量浓度低的情况下,增加生化系统内硝化液回流、控制反硝化过程中溶解氧浓度和投加碳源可有效增加TN去除量。关键词污水处理厂低碳氮比总氮去除技改中图分类号:TU992文献标识码:B文章编号:1009-0177(2023)02-0185-06DOI:10.15890/j.cnki.jsjs.2023.02.024TechnicalReconstructionforTNEmergencyRemovalunderLowC/NInfluentLIUPeizhi,WANGHui∗(WuhanSTDMEnvironmentTechnologyCo.,Ltd.,Wuhan430000,China)AbstractMostoftheearly-builtdomesticurbanwastewatertreatmentplants(WWTPs)withsimpleprocessdesign,poorfacilitiesandlongoperationtimearenotconsideredtoremoveoftotalnitrogeninthedesignforlackofinvestment.Tomeettheincreasinglystringentenvironmentalprotectionregulatoryrequirements,someWWTPsneedtocompletetechnicaltransformationunderlimitedconditions.Inviewofthewatershortageandseriousimbalanceofcarbon-nitrogenratioeasilyleadtoexcessiveTNinsomeWWTPs,thisprojectstudiedfurthermeasurestoreduceTNthroughthesitetechnicaltransformationtest.Thetestresultsshowthat,underlowCODCreffluent,increasingthenitraterefluxdevice,controllingtheDOconcentrationduringdenitrificationandaddingexternalcarbonareeffectivetoraisetheTNremovalrate.Keywordswastewatertreatmentplant(WWTP)lowC/Ntotalnitrogenremovaltechnicalreconstruction[收稿日期]2022-02-07[作者简介]刘培志(1987—),男,工程师,主要从事污水厂运营管理工作,E-mail:liupeizhigz@163.c...
