Treatment of cok_省略_lm hybrid system_

AV8il日bleonlin6stWWw.SCIGnCedi阳Ct.OCm一研矛豁砂碧彝SeienCeDirectJoumalofEnviornmenatlSeienees19(2X()7)153一159JOURNALOFENVIRONMENTALSCIENCESISSN1001一0742CN11一2629ZXwwwJO.C·ac·cn1丫eatmentofcokePlantwastewaterbySNDifxedbioiflmhybridsystemQlRong,YANGuKn,YUZhao一xiang’DePa咖entofhCemis似OTn廖nUivesr奴hSanghaiZ记及理,夕2,hCina.E一amil:瓦na一r@hoamti乙eomRceivde23eFburayrZX()6:ervised26AirPl20()6;aceePted8MayZX()6AbstarctInthisartiele,eokePlantwastewaterwastreatedbyasimultaneousniitrfyinganddeniitrfying(SND)ifxedbioiflmhyibrdsystem.TheresultsshowedthatsuiatblePar别旧etersofhtesystemwereimP0rtantofrthePeorfrmaneeofthebio一degradationsystem.Theehemiealoxygendemand(COD)remova】eifeieneyinihtssystemwassatisafetory,higherthan94%,andammonianiotrgenwasihgherhtan95%.TheeifuentCODeoneentrationeouldmeethtedisehagrestandard,exeePtforveyrfewsituations.Theersultsshowedhtatasuifcientearbonsoucrewasimportantformiaknganlnonianitorgeneoncentartionmeethtedisehagrestandadr.ThenhteTNermovaleifeieneyinhtissystemeanbeboruhgthigherhtan94%.Dissofvedoxygen(DO)15veyrimPortanttohtepeformraneeofhteSNDbi-odegradationsysetm,andhtesuiabtleDO15about3.5一om幼二atthefoerPartoferaeto.rInaddition,thepeirbnnaneeofhtesystemwasalmostnotafeeedtbyPHValue.hTeersultsshowthatthesystem15feasibletoetrateokePlantwastewate.reKywodrs:eokeP]antwastewater:SNDflxedbioiflm:anunoinainotrgen;COD:carbonsoucreIntmdUeitonCokePlantwastewaetr15aikndofytPiealindusitralwasetwater,which15diifeulttobiodegrade.InPraetiealindusytr,hteeomPositionandhteamountofeokePlantwasetwaetrgeradyviaresformonefaetoyrtoanohter,dePendingonhtequalityofarweoal,theoPerationPa-rarneetrs,and50on.BeeauseofhtePerseneeoferfractoyrandbiologieallyinhibiotyrogranieeomPounds,suchasPAHsandhigharnrooinaeonetnt(StamoudisandLuhty,1980:Luhtyetal.,1983:Grady,1990:V几netal.,1991),eokePlantwastewaetr15veyrharlllfultohumanhealht.AtPersent,domesiteeokePlantwasetwaetrsaermainlyetraetdbyeonvenitoniaacitvaetdsludgesystem.hTissysetm15unsaitsacfotyrinermovinghigheoneentrationofammonianiotrgenanderafretoyreo