大型污水处理厂工艺优化及改造案例分析朱石清

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)　　　:　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。　　:　污水处理厂;　高效沉淀池;　达标改造;　工艺优化:X703.1　　:C　　:1000-4602(2007)14-0029-04CaseStudyonProcessOptmiizationandReconstructionofaLarge-scaleWWTPZHUShi-qing1,　GeorgeLee2,　SHANGAi-an3,　ZHANGXin4,　MAISui-hai5　YANGCai-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.ShanghaiUrbanConstructionDesignResearchInstitute,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-2923　1420077　　　　　　　　　　　　CHINAWATERWASTEWATER　　　　　　　　　　　　　Vo.l23No.14Ju.l2007tion;　processoptimization　　,,,,,。。,,,、,。。1　污水厂的背景120×104m3/d,2003,。COD300mg/L、BOD5150mg/L、SS200mg/L、NH3-N30mg/L、PO3-4-P5mg/L;COD180mg/L、BOD570mg/L、SS40mg/L、NH3-N30mg/L、PO3-4-P5mg/L。《》(GB18918—2002),,COD≤100mg/L、BOD5≤30mg/L、SS≤30mg/L、NH3-N≤25mg/L、TP≤3mg/L。2　优化模拟改造系统的分析步骤、、、,“”,。:①　/。、、、、、、。②　、。、,24h,24h,/,()。,120×104m3/d,170×104m3/d。③　。,,,、。④　,。,,/A/O;,A2/O。⑤　,。IWA(ASM2D)。3　模拟方案3.1　120×104m3/d(K=1.3),,1。80×104m3/d,A/O。A/O24h,A/O,。1　Fig.1　Schemeforup-to-standardreconstructionBOD5。BOD570mg/L,BOD575mg/L。,A/O50%,DO,DO2.0mg/L,MLSS3000mg/L。,,,12℃、156×3023　14　　　　　　　　　　　　　　　　　　　　　　　　　　×104m3,7×104m3,20.5×104m3。3、2,1。1　Tab.1　Simulationresultsofschemeforup-to-standardreconstructionofWWTP/℃/(104m3d-1)/(mgL-1)A/OTSSBOD5CODTPNH3-NNO-3-N112156762020.033.566.73.319.46.8212156763018.228.558.82.620.76.0312156764016.023.450.82.420.56.2412156765016.019.344.42.920.26.5512120403020.235.469.60.922.75.2612120404018.129.159.70.819.97.4712120405014.922.549.10.719.08.1812120406012.616.239.20.618.78.4920156762020.033.266.42.812.612.01020156763018.228.258.62.710.813.61120156764016.523.350.92.89.115.11220156765014.518.543.23.38.116.01320120403020.235.169.21.013.013.01420120404018.128.859.40.810.815.01520120405015.022.248.90.78.616.91620120406012.615.938.90.66.618.81728156762019.933.066.22.412.59.21828156763018.127.958.32.510.710.31928156764016.322.950.52.68.911.42028156765014.618.042.72.87.212.52128120403020.134.969.11.412.99.22228120404017.528.358.71.310.510.62328120405014.821.848.51.98.010.92428120406012.315.238.31.85.612.4　　,A/O30×104m3/d,,BOD5。,。,TP(3mg/L),TP。,,。3.2　,,80×104m3/d,A2/O。50%,MLSS3000mg/L,、、。A2/O,、、DO0、0.12.0mg/L。(12℃)(104×104m3/d)31×104m3,6.2×104m3,5.425×104m3,19.375×104m3。TN,。,A/O。2、34DO,2。31:23　142　Tab.2　SimulationresultsmiddleandlongperiodextensionprojectofWWTP/(mgL-1)/(104m3d-1)/℃DO/(mgL-1)SRT/dMLSS/(mgL-1)MLVSS/(mgL-1)TSSBOD5CODTPNH3-NNO-3-N801226.4299711329.93.355.90.423.03.91041225.03006117112.64.157.40.423.53.480200.66.83028107610.02.655.11.29.810.3104200.65.23020110112.63.556.80.519.84.180201.07.33015114310.02.655.45.50.917.4104201.05.52999118512.63.657.25.44.615.080280.256.9299195910.02.154.70.914.33.5104280.255.43009100512.63.056.30.618.81.980280.57.62998103110.02.155.05.90.115.9104280.55.93006108812.62.956.65.80.515.880281.07.63001103010.02.155.15.90.117.6104281.05.93009108812.63.056.85.80.117.6　　,TPNH3-N。,COD、BOD5、TSS,。12℃DO,;20℃28℃,DO,,。:[1]　LeeGeorge,GoodleyJim,,.[J].,2006,22(2):26-30.[2]　LiuW,LeeG,,.[J].,2006,22(8):29-32.[3]　,,,.SouthBermuda[J].,2006,22(4):31-33.:[phone]E-mail:[e-mail]:2007-03-14河北省秦皇岛市第一污水处理厂改造工程　　工程内容:新增变配电室、初次沉淀池、平流沉砂池、初沉污泥池、曝气池、二次沉淀池、紫外线消毒渠;处理规模:4×104m3/d;处理工艺:污水处理采用A/A/O工艺,污泥处理采用机械浓缩脱水工艺;投资金额:1979.68万元;业主单位:秦皇岛市海港区建设局;设计单位:中国市政工程华北设计研究院设计二所。辽宁省阜新市清源污水处理厂污水再生回用工程　　工程内容:敷设输水管网约15km,管径为DN300～DN1200,水处理设施(混凝、沉淀、过滤、消毒)及相关设备;处理规模:7×104m3/d;投资金额:9720万元;设计单位:中国市政工程华北设计研究院设计九所。江苏省淮安市经济开发区工业污水处理厂工程　　处理规模:8×104m3/d;投资金额:4800万元;设计单位:中国市政工程华北设计研究院设计二所。()3223　14