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201817·146·(430000)[]1.0×104m3/d(GB18918-2002)BB/IV[]IV[]TQ[]A[]1007-1865(2018)17-0146-02UpgradationProjectofQuasi-IVStandardsforWastewaterTreatmentPlantContainingHighConcentrationsofAmmoniaNitrogenandTotalPhosphorusInfluentLaiHuihui,YueHuabin,HuYanxin(ChinaGezhoubaGroupInvestmentHoldingsCo.,Ltd.,Wuhan430000,China)Abstract:ThedesignscaleofawastewatertreatmentplantinTaiZhouCityis1.0×104m3/d,andtheimprovedoxidationditchprocessisusedforbiologicaltreatment.TheeffluentqualitywasrequiredtometthefirstlevelBcriteriaintheDischargeStandardofPollutantsforMunicipalWastewaterTreatmentPlant(GB18918-2002).However,duetothehighconcentrationofammonianitrogenandtotalphosphorusintheinfluentwater,theeffluentcannotreachthefirstlevelBcriteriaforalongtime.Inthisphaseoftheproject,theplantwillbeupgradedtostrengthenthebiologicalnitrogenremovaleffectBytransformingtheoriginaloxidationditch,buildinganewanaerobictankandbuildingasecond-stageanoxic/aerobictank,ensuringthatammonianitrogenandtotalnitrogenmeettherequirementsofthewaterdischargeindex,andatthesametimeundertakepartofthephosphorusremoval.Thenewdeeptreatmentsystemisoperatedinserieswithtwo-stagehigh-efficiencysedimentationtankstoensurethatthetotalphosphorusintheeffluentisuptostandardbychemicalphosphorusremoval.Thedenitrificationdeep-bedfilterisusedforfiltrationtoensurethatthesuspendedsolidsmeetthestandardandsomeorganicmatterandtotalnitrogencanberemoved.Afterthissubproject,theeffluentqualitywillmeettheQuasi-IVStandards.Keywords:UpgradationProjecthighconcentrationofammonianitrogenhighconcentrationoftotalphosphorushigh-efficiencyprecipitationtankDenitrificationDeepBedFilterProcessQuasi-IVStandards20121.0×104m3/dB()11.0×104m3/d2012++++(GB18918-2002)B2015120168()1(NH3-N)(TN)(TP)TPTPBTNB1(2015.1-2016.8)Tab.1ActualDataAnalysisTable(2015.1-2016.8AverageValue)mg/LBOD5CODSSNH3-NTNTP91.0212.0234.537.743.217.19.9821.777.471.5316.896.37B/%/99.898.098.874.17.822()IV2Tab.2Designinletandoutletwaterqualitymg/LBOD5CODSSNH3-NTNTP30040040050551863051.5(2.5)12(15)0.312133133.1TNTPTNTPAO0.5×104m3/d0.5×104m3/dAO32h[1]3.2+[2]TP[]2018-07-12[](1992-)20181745379·147·TP2~3mm1.8mSS5mg/L[3]BOD5mg/LSS5mg/LTN3mg/LTP1mg/LTP0.3mg/L411Fig.1Flowchartoftreatmentprocess55.11.0×104m3/d0.5×104m3/dAOV=500m3HRT=2.4hAV=1750m3HRT=8.4hOV=2100m3HRT=10.1hAV=1100m3HRT=5.3hOV=800m3HRT=3.8h6.0m0.02kgTN/kgMLSS.dBOD0.1kgBOD/kgMLss.d4000mg/L100%200%2Q=173~345L/sH=0.8~1.2mN=4kW5.2AOV=490m3HRT=2.3hAV=1236m3HRT=5.9hOV=1892m3HRT=9.1hAV=1236m3HRT=5.9hOV=490m3HRT=2.3h6.0m0.02kgTN/kgMLSS.dBOD0.1kgBOD/kgMLss.d4000mg/L100%200%2Q=173~345L/sH=0.8~1.2mN=4kW5.3TP=13mg/LTP=2mg/LPAC349mg/LTP=0.3mg/LPAC120mg/L(1)()2D=1000mmN=11kW(2)()2D=2400mmN=5.5kW(3)2D=9.0mN=0.75kW(4)42Q=15~25m3/hH=20mN=5.5kW(5)S=126m2L=1.5mH=1.3m60°φ=80mmv=6.6m/h(6)28L×B×H=4000×300×300mmδ4mm3045.449.6×2.9×6m3.7m/h5.9m/hTN=15mg/LTN=8mg/L20mgBOD5/L28m22%2.0~3.0mm1830mm(1)21Q=200m3/hH=12.5mN=15kW(2)()21Q=21m3/minH=69kPaN=45kW6201712IV20181—201863IV3(2018.1-2018.6)Tab.3Actualinletandoutletwaterqualityaverage(2018.1-2018.6)mg/LBOD5CODSSNH3-NTNTP152.3380.8431.743.9458.6520.475.215.81.10.255.500.06IV/%98.397.898.999.410099.47IVAOIV[1]A/A/O[J]20115(08)1729-1734[2][J]201733(24)87-91[3]/[J]201742(06)167-169