PCLSND系统的脱氮效果胡玉

105Vol．10No．520165ChineseJournalofEnvironmentalEngineeringMay2016PCL-SND12121212*1．2013062．201306polycaprolactonePCLsimultaneousnitrificationanddenitrificationSNDPCL-SNDhydraulicretentiontimeHＲTPCL-SND。PCL10%HＲT24hNH+4-N10mg/LNO－3-N50mg/L45dNH+4-NTN76．55±0．98%56．85±2．21%。HＲTPCL-SNDTNHＲTNO－3-NHＲTHＲT＞8hNH+4-N85%～89%HＲT24hTNNH+4-N68．56±1．64%87．75±2．78%NO－3-N15．72±1．46mg/L。pHHＲTHＲT。X703A1673-9108201605-2420-07DOI10．12030/j．cjee．201412155EffectofnitrogenremovalbyPCL-SNDsystemHuYu12LuoGuozhi12LiLi12TanHongxin121．CollegeofFisheryandLifeScienceShanghaiOceanUniversityShanghai201306China2．ShanghaiAquacultureEngineeringCenterShanghai201306ChinaAbstractPolycaprolactonePCLwasusedasbothacarbonsourceandbiofilmcarriertoremovenitroge-nouscompoundsfromaquaculturewastewaterbysimultaneousnitrificationanddenitrificationSNDinanairliftreactor．Thestart-upprocessandthenitrogenNremovalefficiencyaswellastheeffectsofhydraulicretentiontimeHＲTonnitrogenNremovalofaPCL-SNDsystemwerestudied．Theexperimentalresultsshowedthatwith10%fillofPCLcarrieraHＲTof24htheinfluentammoniaNH+4-Nconcentrationof10mg/LandanitrateNO－3-Nconcentrationof50mg/LthePCL-SNDsystemachievedastablestateat45d．AtthisthattimetheremovalefficienciesofNH+4-NandtotalnitrogenTNwere76．55±0．98%and56．85±2．21%respectively．TheTNremovalefficiencydecreasedwiththedecreaseofHＲTwithinacertainrangeandtheeffluentnitrateconcentrationincreasedwiththedecreaseofHＲT．HoweverwhenHＲT＞8hthere-movalrateofNH+4-Nwasbasicallystable85%to89%．ThebestnitrogenNremovalwasachievedataHＲTof24h．TheaverageremovalefficienciesofTNandNH+4-Nwere68．56±1．64%and87．75±2．78%respectivelyandtheNO－3-Nconcentrationofeffluentwas15．72±1．46mg/L．ThepHandalkalinityde-creasedthedecreaseofHＲT．HoweverthebiomassincreasedwithwhileHＲTdecreased．KeywordssimultaneousnitrificationanddenitrificationSNDnitrogenremovalhydraulicretentiontimeHＲT1432050190013DZ22805002014－12－172015－02－081989—。[e-mail]*[e-mail]。。simultaneousnitrificationanddenitrificationSND1SND20702。SND5PCL-SND、、、3。SND4-56-7。C/NSND。、8、biodegradablepolymersBDPs。BDPs9-10。BDPsSNDChu11PCLC/NSNDHＲT18．5hTN74．6%。polycaprolactonePCLSNDhydraulicretentiontimeHＲTPCL-SND。PCLSNDHＲTPCL-SND。11．147．2mg/L、78mg/L、31mg/L、95mg/L、37mg/L、360mg/L2mL/LEDTA640mg/L、550mg/L、230mg/L、340mg/L、75mg/L、25mg/L、47mg/L。cNH+4-N=10mg/LcNO－3-N=50mg/LcTN=60mg/LcTOC=4．58～38．9mg/LpH=7．45～8．10。PCL3mmε-1．12kg/L80000g/moL60℃≥99．5%≤1%800%3g/10min。1．260cm10cm20cm。11L。1。1PCL-SNDFig．1SchematicdiagramofPCL-SNDreactor1．3PCL35℃12hPCL1．1kg。pH7．5～8．01h/1h200L/hdissolveoxygenDO5．59±1．02mg/L。20NO－3-N。20d50mg/LNO－3-N。1HＲT24hNH+4-N、NO－2-N、NO－3-NTN3PCL-SNDTN5%2HＲT30、24、18、12、86h6NH+4-N、NO－2-N、NO－3-NTNHＲTPCL-SND。1．40．45μmNH+4-NTN-NO－3-N124210NO－2-N12DOCTOC-V．CPHDOpHYSI556YSIIncorporated1725YellowSpringsOH。13。NH+4-NTN14ＲＲ=c0－ctc0×100%c0ctNH+4-NTN。22．1PCL-SND2TNFig．2ChangesinconcentrationsofnitrogencompoundsineffluentandtotalnitrogenremovalefficiencyPCL-SND2PCL-SND。NH+4-N10d2．0mg/L2．0mg/L76．55±0．98%。40NO－3-N5mg/L21．36±1．60mg/LNO－3-N3TOC22．45mg/LNO－3-N。NO－2-N＜0．5mg/L。TN56．85±2．21%70%。Chu11PCLC/NSNDHＲT18．5hTN74．6%NO－2-N。Walters7PHBPCLSNDTN75%。SNDTN。3TOCFig．3TOCconcentrationchangesDOSNDDO0．5mg/LSND1516SBＲDOSNDDO0．5～0．6mg/LSND。DO2．92～7．51mg/L17PBSSNDDO6．2mg/LTN99．10%。18DO1．4～8．5mg/L0．63～0．68mg/g·dPBSDO。PCL-SNDpHpH7．81±0．22。20d20d4。5。2．2HＲTPCL-SND2．2．1HＲT22425PCL-SND4pHFig．4ChangesinpHandtotalalkalinityininfluentandeffluent5Fig．5ChangesinbiomassHＲT19-20。21HＲT。HＲTNH+4-N6HＲT6hNH+4-NNH+4-N6HＲTNH+4-NFig．6AmmoniaconcentrationchangesineffluentunderdifferentHＲTs。HＲTNH+4-N88．98±3．90%30h、87．75±2．78%24h、88．17±3．11%18h、85．47±3．00%12h、88．53±2．24%8h50．68±7．68%6h。Liu22HＲT2h4hNH+4-N47．2%98．1%。HＲT6h8hNH+4-N50．68±7．68%88．53±2．24%HＲT。Thanh23HＲT4h8hNH+4-N。PCLHＲT8～30h。HＲT＜8hHＲT24NH+4-N。HＲTNO－3-NNO－2-N7HＲTNO－3-N16．03±1．23mg/L30h、15．72±1．46mg/L24h、21．22±1．55mg/L18h、21．44±2．17mg/L12h、29．97±1．03mg/L8h37．20±1．58mg/L6hNO－3-NHＲT。10HＲT。HＲT7HＲTNO－3-NNO－2-NFig．7ChangesofNO－3-NandNO－2-NineffluentunderdifferentHＲTs。9PBS324210NO－3-NHＲT。HＲTHＲT19-20。NO－2-NHＲT6h30h1．0mg/L。HＲT6hNO－2-N、。HＲT30hpH7．89NO－2-NpHpH25。NO－2-N26。HＲTTN8TNHＲT。HＲTTN64．57±1．56%30h、68．56±1．64%24h、59．92±2．41%18h、59．89±2．97%12h、47．39±4．71%8h27．70±2．50%6hHＲT24h。HＲT6hTNTNHＲT＞8hTN。HＲT23。HＲTTN。HＲT27TN。HＲT。Thanh23HＲT-HＲTTNHＲT28HＲTMBBＲSNDHＲTTN。HＲT＞8hSND、DO。DO17-18。TOC10mg/LHＲTTOC44．21±5．60mg/L30h、46．63±5．98mg/L24h、18．64±5．78mg/L18h、7．31±1．67mg/L12h、7．49±3．61mg/L8h5．61±2．26mg/L6h。。8HＲTTNFig．8TNremovalefficiencyunderdifferentHＲTs2．2．2HＲTpH、SNDPH7．5。SND299pH7．86±0．067。10TN。9HＲTpHFig．9pHchangesineffluentunderdifferentHＲTs10HＲTFig．10AlkalinitychangesineffluentunderdifferentHＲTs42425PCL-SNDHＲTHＲT27HＲT5．692×108CFU/gPCL6h、4．956×108CFU/gPCL8h、4．849×108CFU/gPCL12h、2．597×108CFU/gPCL18h、2．550×108CFU/gPCL24h1．572×108CFU/gPCL30hHＲT。HＲTHＲT30HＲT。3145dNH+4-N76．55±0．98%TN56．85±2．21%NO－3-N21．36±1．60mg/LNO－2-N＜0．5mg/L。。PCLSNDC/N。2HＲTPCL-SND。HＲT＜24hTNHＲT。NO－3-NHＲTHＲT＞8hNH+4-NpHHＲTHＲT。1MünchE．V．LantP．KellerJ．Simultaneousnitrifica-tionanddenitrificationinbench-scalesequencingbatchre-actors．WaterＲesearch1996302277-284