大型污水处理厂工艺优化及改造案例分析_朱石清

大型污水处理厂工艺优化及改造案例分析朱石清1,GeorgeLee2,尚爱安3,张欣4,麦穗海5,杨彩凤5,徐鸿德3,张善发6(1.上海市水务局,上海200003;2.BioChemTechnologyInc,USA;3.美国生化科技公司上海代表处,上海200336;4.上海市政工程设计研究院,上海200092;5.上海市南运营公司白龙港水质净化厂,上海201203;6.上海市城市建设设计研究院,上海200120)摘要:对上海某大型污水处理厂(原设计处理量为120×104m3/d,采用高效沉淀池处理工艺)进行了工艺优化及模拟改造,介绍了优化模拟改造系统的分析步骤,建立了污水厂达标改造和扩建工艺模型。污水厂达标改造工艺模型模拟结果表明,高效沉淀池的处理出水应根据具体情况,部分进入二级生物处理,以达到排放标准;扩建工艺模拟结果表明,应根据实际进水量和水温情况合理控制DO,出水水质才能达到排放标准。关键词:污水处理厂;高效沉淀池;达标改造;工艺优化中图分类号:X703.1文献标识码:C文章编号:1000-4602(2007)14-0029-04CaseStudyonProcessOptmiizationandReconstructionofaLarge-scaleWWTPZHUShi-qing1,GeorgeLee2,SHANGAi-an3,ZHANGXin4,MAISui-hai5YANGCai-feng5,CharlesXu3,ZHANGShan-fa6(1.ShanghaiWaterAuthority,Shanghai200003,China;2.BioChemTechnologyInc.,USA;3.ShanghaiRep.Office,BioChemTechnologyInc.,Shanghai200336,China;4.ShanghaiMunicipalEngineeringDesignInstitute,Shanghai200092,China;5.ShanghaiBailonggangWWTP,Shanghai201203,China;6.ShanghaiUrbanConstructionDesign＆ResearchInstitute,Shanghai200120,China)Abstract:TheprocessoptimizationandsimulationreconstructionofaShanghailarge-scalewastewatertreatmentplant(WWTP)werecarriedou.tIntheoriginaldesign,thecapacitywas120×104m3/dandcoagulation-flocculationsedimentationtank(CFST)processwasused.Theanalyticalproce-duresoftheprocessoptimizationandsimulationreconstructionsystemwereintroduced,andthemodelsforup-to-standardreconstructionandextensionprocessesoftheWWTPwereestablished.Thesimulationresultoftheup-to-standardreconstructionprocessshowsthataccordingtotheconcretesituation,thepartoftheeffluentfromCFSTshouldreturntothesecondarybiologicaltanktoreachthedischargestandard.ThesimulationresultoftheextensionprocessshowsthatDOshouldbereasonablycontrolledaccordingtotheWWTPinfluentloadandtemperature,sothattheeffluentqualitycanachievethedischargestandard.Keywords:WWTP;coagulation-flocculationsedimentationtank;up-to-standardreconstruc-29第23卷第14期2007年7月中国给水排水CHINAWATER＆WASTEWATERVo.l23No.14Ju.l2007tion;processoptimization传统的污水厂改造一般以历史数据或标准值作为设计基础,考虑到实际情况的不确定性,还会采取较大的安全系数,从而导致工艺设计尺寸过大,基建投资费用过高,但处理