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(4),,,,,,115mg/L,(810-115)100000365=237250kg,,,1RichardIS,etal.PhosphorusandNitrogenRenovalFromMunici2palWastewater.NewYork,LewsPublishes,1991.1412012,..,1994,20(2):18213..:,19964.A+A2/O.,1998,24(3):18225,..,1999,25(8):3335:541004:(0773)1261855350,13707737123:1999O12O29,,,015mg/L,6610%,0:,,,,,,(),A/O,,;,,,,,,,,,,(Aerobicdenitrification)[12]30%[3],,1111,100mm,700mm,5L12h,5,015h,3h,7h,1h,015h28,3L(2L),25mL85d112,71Vol.26No.420003,COD/N517841262103(),12211COD/NCOD/N,,NH3-N100%(99%),COD90%,COD/N,NO-3-N18179mg/L,2316mg/L27193mg/LCOD,NO-3-N,,,11COD/NCOD/NCOD/mg/L/mg/L/mg/L/%/%/%5178346162617592128591920129917018179681614126252196181529216859136012991702316060121210310616121868719452164012991602719346188(1COD/N=2103),,,(46188%),COD/N(2103),,,,,,,,COD/N4,212,COD/N=5178,11,315h(015h3h),7h1015h,,;2h,2h1,1,;2h,,,,1COD/N,24199%,17116%3192%,,,,COD,COD,,,22COD213COD400mg/L,NH3-N40mg/L,MLSS4000mg/L,TDO2100(DO)11h,DO4mg/L,2mg/L015mg/L,DO,33,DO,11h,100%,NH3-N100%,DO,TN3519%4715%6610%81Vol.26No.420003DO,DO,DO,,,DO,,3,,,311,,[4],DO(DO011mg/L)80,PseudomonasSppAlcaligenesfaecalisThiosphaeraPantotropha,[56],[6]Robertson,ThiosphaeraPantotropha/(),(,),Pdy2P2hydroxybuty2rate(PHB),DO,[5],,()[6]312;,:NH3H2N-NH2NH2-OHN2N2O(HNO)()NONO-2NO-3,N2N2ONONON2O,10%[7],MarshallSpectorN2O50%80%[8],,,DO,SRT,N2O[9];,N2O[10]N2O,,,N2O,,313(),(DO),,:,m,,,(91Vol.26No.42000),,,,[11],,:DO,,,;,,DO,,,,,,,,,5%,,DO,,,DO,(F/M)F/MDO,,F/MDO,,,,4,,DO,,;,,,1HongWZhao,DonaldsMavinic,etal.Controllingfactorsforsimul2taneousnitrificationanddenitrificationinatwo-stageintermittentaerationprocesstreatingdomesticsewage.WaterResearch,1999,33(4):9619702HyungSeokYoo,etal.Nitrogenremovalfromsyntheticwastewaterbysimultaneousnitrificationanddenitrification(SND)vianitriteinaintermittently-aeratedreactor.WaterResearch,1999,33(1):1451543RandallCW,BarnardJLandStenselHD.Designandretrofitofwastewatertreatmentplantsforbiologicalnutrientremoval.WaterQualityManagementLibrary,Vol.5,TechnomicPublishingCompa2ny,Inc,Lancaster,PA,19924KnowlesR.Denitrification.MicrobiologyReview,1982,46.43705RobertsonLA,vanNielEWJ,etal.SimultaneousnitrificationanddenitrificationinaerobicchemostatculturesofThiosphaerapan2totropha.AppliedEnvironmentalMicrobiology,1988,54(1):281228186VanNeilEWJ.Nitrificationbyheterotrophicdenitrifiersanditsrelationshiptoautotrophicnitrification.PhDThesis.DelftUniver2sityofTechnology,Delft,19917HanakiK,HongZAndMatsuoT.Productionofnitrousoxidegasduringdenitrificationofwastewater.WaterScienceandTechnolo2gy,1992,26.10278MarshallSpector.Productionanddecompositionofnitrousoxideduringbiologicaldenitrification.WaterEnvironRes,1998,70.109610989ZhengHong,etal.Greenhousegas-N2Oproductionduringdenitri2ficationinwastewatertreatment.WatSaTech,1993,28(7):20320710LloydHandKetchumJr.Designandphysicalfeaturesofsequencingbatchreactors.WaterScienceandTechnology,1997,35(1):111811,..:,1998:210096:(025)3793479(H):2000O1O2602Vol.26No.42000WATER&WASTEWATERENGINEERINGVol126No14April2000CONTENTSWaterSupplyforMulti-StoryBuildingwithoutRoofWaterTankinHangzhouHongJueminetal(1)Abstract:Thechangeofhydraulicstatuswasinvestigatedinthewatersupplysystemofmulti2storyresidentialbuildingswheretheroof2locatedwatertankhasbeenabandoned.Thestartingplantobuildsuchasystemisdescribed.Theneededinvestmentandoperatingfeearealsoestimated.DEOxidationDitchTreatingUrbanWastewaterYuanHonglinetal(6)Abstract:ThetreatmentefficiencyoftheDEoxidationditchwasinvestigatedinBeishiqiaoWastewaterTreatmentCenterinXian.TheresultshowsthatthesystemhasachievedaremovalofCOD,TNandTPashighas87.5%91.6%,63.6%66.9%and85.0%93.4%respectivelyandtheeffluentqualityisbetterthantheclassIIoftheNa2tionalStandard.Oneoftheprincipalfeaturesofthissystemisutilizingthehighadsorptionabilityofsludgeintheselec2tivebasinandthedecompositionabilityofbacteriaintheoxidationditchtoachievehighremovaloforganicandnutrientmatters.ApplicationofKMnO42PACProcessforWaterPurificationZhaRenguangetal(9)Abstract:TheoperatingpropertyofcompositeKMnO42PAC(powderactivatedcarbon)processwasevaluatedandtheireffectstoremovethecolority,tasteandturbidityofslightpollutedrawwaterandtoreducethealumconsumptionhavebeenprovedevidently.Thisprocesswillbeaneconomical,simpleandconvenientalternatetoimprovetheefficien2cyofoldwaterworks.Fe2MnRemovalandHardness2TSSReducinginWaterLiJizhenetal(12)Abstract:Theresultsofjartest,benchscaleexperimentandpilotplantoperationshowthattheAeration2LimeAl2kalizationprocesscanreducetheTHandTSSlevelsimultaneouslywiththeremovalofFeandMn.Thetreatedwaterisquitegoodtomeettherequirementofnationaldrinkingwaterstandard.PracticeonBiologicalPRemovalbyA2/OProcessZhangXuehongetal(14)Abstract:TheeffectsofthreefactorswhichinfluencethephosphorusremovalbyA2/Oprocessnamelydissolvedoxygencontents,NOx-N,andactivatedsludgeageareanalyzedfromtheviewofengineeringpracticeatThe4thWastewaterTreatmentPlantinGuilin,GuangxiProvince.Somemeasureshavebeenadoptedtoforcetheefficiencyofphosphorusremoval.ThesucceededresultshowsthatthePremovalhasbeenimprovedevidently.StudyonAerobicDenitrificationduringtheA