610081、、。、、。COD、BOD575%、70%SS、TP。X703C1000-4602201212-0059-04ProcessDesignofHigh-densitySedimentationTankforCombinedSewageTreatmentYANGHua-xianCHENJianHUANGShen-yongSouthwestMunicipalEngineeringDesignandResearchInstituteofChinaChengdu610081ChinaAbstractThecombinedsewagewascharacterizedbyrapidflowlargequalityfluctuationanddif-ficulttreatmentwithconventionalmethods.High-densitysedimentationtankwasused.Bycomparingwiththecurrentnormsandstandardsthedesignfeaturesandparametersoftheprocesswereanalyzedinclu-dingchemicalsdosingandstirringsand-addingandcyclinghigh-speedsedimentation.Thetrialopera-tionresultsshowedthattheprocesswasefficientandreliable.UndertheconditionofinfluentqualityfarexceedingthedesignvaluetheremovalratesofCODandBOD5were75%and70%respectivelyandtheeffluentSSandTPmetthedesigncriterion.Keywordshigh-densitysedimentationtankcoagulationmicro-sandinclined-tubesedi-mentationcombinedsewage。2010“”200920106486774。A2/O+30×104m3/d。、5COD、SS、TP。Actiflo18×104m3/d。·95·281220126CHINAWATER&WASTEWATERVol.28No.12Jun.201211.1、135μm。1。1Fig.1Flowchartofhigh-densitysedimentationtank、COD、SSTP1~31。1Tab.1EfficiencyofCEPT/mg·L-1/%CODSSTP0.15PAC35.46279.267.3100.1580*91—30PAC3060*70—100.155183—2502008008060—720899196*BOD5。1.22、、、。。。2Fig.2Layoutofprocess1.3①。、。②。。③。、、。④。。。2。2。2、Tab.2Designinfluentandeffluentqualityofcombinedsewagemg·L-1CODBOD5SSTNNH+4-NTP1759514533.7313874530——1.5。。2.11.5mg/L9.37mg/L40~50mg/L·06·2812.watergasheat.com2~2.560mg/L7d。1.95m5.35m7.5kW。1.8min255s-1《》。2.2135μm3mg/L。10~20min。、85%~95%。2N=0.25×2+0.55×2=1.6kW2m3。、15d。。2.3PAM1mg/L0.1%。D=2.85mL=4.9mN=5.5kW。3.2minGT3.1×104。2.4《》6.2.530min6.5.11.5~4.5m3/m2·h3.0~9.0m3/m2·h。5m56m266.8m/h6.7min。“”7~224。32L/s·m2.9L/s·m11。D=9.8mN=2.2kW。2.526321。、、。Q=74m3/hH=200kPaN=11kW。2.623。2.7。。32010620101112。201183。201110。3、Tab.3InfluentandeffluentqualityofActiflohigh-densitysedimentationtankinpilotoperationperiodCODBOD5SSTP/mg·L-1290~326135~148177~2705.9~7.2/mg·L-160~10138~5513~210.7~0.9/%71~8163~7492~9485~9018~25×104m3/dAl2SO4350mg/LPAM1mg/L。2TN、NH+4-NCOD、BOD5、SS、TP75%、70%、93%、87%SS、TP。56。·16·.watergasheat.com28124①60m/h、、、。②。1.J.19992598-9.2.J.2003191310-12.3.J.199915538-40.4.DensadegJ.2008241840-41.5.J.20072381-4.6.ActifloCSOJ.2010262049-52.E-mailhuaxiancq@163.com櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵2011-11-23586.———J.2004156781-786.7.J.20052571788-1795.8.J.2002175604-609.9.J.200824272-74.10.J.2005516-18.11.J.2006265-66.12.J.200629334-39.E-mailzhaijun99@126.com2012-01-20·26·2812.watergasheat.com