节能型半地下污水厂多段多级AO工艺设计及调试运行_刘常敬

节能型半地下污水厂多段多级AO工艺设计及调试运行刘常敬，石凤，杨晨光，黄松，史帅，黄宇(中国市政工程西北设计研究院有限公司天津分院，天津300220)摘要:大连某污水处理厂设计规模为12×104m3/d，出水水质达到《城镇污水处理厂污染物排放标准》(GB18918—2002)的一级A标准。生物处理采用多段多级AO工艺，多点进水充分利用碳源，强化除磷脱氮效果，厌氧区、缺氧区采用水力混合节省能耗。深度处理采用上向流悬浮滤料滤池工艺，利用自过滤水重力反冲洗，无需反冲洗水泵及反冲洗风机等设备。构筑物采用半地下式结构，顶部加盖覆土绿化。污水厂既有地下式污水厂的优美环境，又具有地上式污水厂操作管理的便捷。介绍了主要构筑物的设计参数及工艺特点，并对调试运行过程中出现的问题提出了相应措施。关键词:多段多级AO工艺;上向流悬浮滤料滤池;调试运行中图分类号:TU992．3文献标识码:C文章编号:1000－4602(2018)22－0051－04基金项目:中建股份科技研发课题(CSCEC－2017－E－10)DesignandCommissionofEnergy-savingandSemi-undergroundWastewaterTreatmentPlantwithMulti-stageAOasTreatmentProcessLIUChang-jing，SHIFeng，YANGChen-guang，HUANGSong，SHIShuai，HUANGYu(TianjinBranch，CSCECAECOMConsultantsCo．Ltd．，Tianjin300220，China)Abstract:ThedesigntreatmentcapacityofawastewatertreatmentplantinDalianCitywas12×104m3/d，andtheeffluentqualitywasrequiredtomeetthefirstclassAstandardoftheDischargeStand-ardofPollutantsforMunicipalWastewaterTreatmentPlant(GB18918－2002)．Multi-stageAOprocesswasadoptedasbiologicaltreatmenttechnology，inwhichtheinfluentorganiccarbonsourcewasfullyuti-lizedviamulti-pointinflowmode．Asaresult，theeffectofphosphorusandnitrogenremovalperformancecouldbestrengthenedandtheadoptionofhydraulicmixingmodeintheanaerobiczoneandanoxiczonedirectlycontributedtosavingenergy．Up-flowfloatingmediafilterwasadoptedinadvancedtreatmentprocess，inwhichtheself-filteringwatergravitybackwashingwasused，waterpump，backwashfanandotherequipmentwerenotadopted．Thestructurearesemi-undergroundandcoveredwitharoofforsoilgreeningatthetop．Thewastewatertreatmentplanthasboththebeautifulenvironmentoftheundergroundpartandtheconvenientoperationandmanagementoftheabove-groundpart．Thedesignparametersofmainstructuresandtheprocesscharacteristicswereintroducedinthispaper，andthecorrespondingmeasurestosolvetheproblemsoccurredduringcommissionandoperationwereproposed．Keywords:multi-stageAOprocess;up-flowfloatinglayerfilter;commission·15·第34卷第22期2018年11月中国给水排水CHINAWATER＆WASTEWATERVol．34No．22Nov．20181工程概况大连某污水处理厂设计规模为12×104m3/d，占地面积为6．72hm2。该工程出水水质执行《城镇污水处理厂