pH对混合污泥水解酸化的影响苏高强5e8972a47f1922791788e80a

612Vol．6No．12201212ChineseJournalofEnvironmentalEngineeringDec．2012pH*100124pHpH。20±1℃pH=4～11pH。pHSCODSCODpH=1011SCOD。pHpH=10。。VSSTSS。pH320～22℃pH=10。pHX703．1A1673-9108201212-4257-06EffectofpHonhydrolysisandacidificationofmixedsludgeSuGaoqiangWangChuanxinZhengBingyuPengYongzhenKeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentalRecoveryEngineeringEngineeringResearchCenterofBeijingBeijingUniversityofTechnologyBeijing100124ChinaAbstractTheeffectofpHonhydrolysisandacidificationofwasteactivatedsludgeWASandprimarysludgePShadbeenstudiedbutformixedsludgeMStheeffectofpHwasrarelyreported．ThereforetheeffectofpHrangingfrom4to11onhydrolysisandacidificationofmixedsludgeat20±1℃wasinvestiga-ted．TheresultsshowedthatpHcontrolledconditionswerebetterforSCODsolubilizationthanuncontrolledcon-ditions．StrongalkalineconditionsespeciallypH=1011werebetterthanothersforSCODsolubilization．Al-kalineconditionswerebetterforacidproductionthanacidandneutralconditions．Moreammoniaandphosphoruswerereleasedunderacidandextremealkalineconditions．ComparedthefermentationcharacteristicsofMSwithWASandPSundervariouspHconditionsitwasfoundthatthehydrolysisandacidificationabilitieswereallbet-terunderalkalineconditionsthanunderotherconditions．Besidesfrom20to22℃thebestconditionforacidproductionwereallatpH=10．KeywordsmixedsludgeanaerobicfermentationpHcontrolledhydrolysisandacidificationVFA511780078632011AA060903-022011－10－172011－11－081985～。[e-mail]*[e-mail]。Chen1pH4～11SCFAs。Wu2pH3～11SCFAs。pH。20±1℃pH4～116。11．120±1℃91L900mL2mol/LNaOH2mol/LHCl8pH4、5、6、7、8、9、10、11pH3minpHpHpH2pH0．2。100±10r/min。20d4d。1．2A2/OVSS。31。。13Table1CharacteristicsofthreetypesofsludgepHTSSmg/LVSSmg/LTCODmg/LNH+4-Nmg/LPO3－4-Pmg/LSCODmg/Lmg/Lmg/L7．5086297487—84213962216．97123038313161551374418175316．921960610636—24416485203471．34000r/min20min0．45μmSCOD、NH+4-N、PO3－4-P、SP、SCSCFAs。pHWTW340iTSSVSSTCODSCOD5B-1CODNH+4-NPO3－4-PSC-SPlowry-folinSC-FAs6890N。2。22．12．1．1SCODSCOD1pHSCOD。1pH=1011SCOD20d46234824mg/LpHSCOD。pH=4SCOD4700．5993．4mg/L。pH=5、6、7、8、91pHSCODFig．1EffectofpHonSCODsolubilizationofmixedsludgeSCOD81377、1101、1047、11321950mg/L。SCODSCODpH=1011SCODSCOD。SCODSCOD。1pH=1011SCOD。SCODpH=11＞pH=10＞pH=9＞pH=5＞pH=4、6、7、8852412pH＞。Wu2pHPS5dSCODpH=10＞pH=9＞pH=8＞pH=6＞pH=7＞pH=5＞pH=4＞H=3＞。3pHWASSCODpH=11＞pH=10＞pH=9＞pH=8＞pH=4＞pH=5＞pH=7≈＞pH=6。3pHSCOD。SCODpHSCOD3pHSCOD。SCOD1EPS4。2SCOD5。3NaOHpHNa+EPSCa2+Fe3+EPS6。SCOD。2．1．27。2pH。2。pH=1011。Chen1Wu2。EPSEPS。2．2、、、6SCFAs11．07、1．51、1．82、1．82、2．04、2．04CODTV-FA。3。TVFATVFAVSS。3pH=443．5mgCOD/gVSS。pH=5、6、7、8、9825．4、20．2、28．3、31．3、65．713．1mgCOD/gVSS。pH=10111695246117．3100．2mgCOD/gVSS。pH=11。312VFA3Yu8。2．34pH。4pHFig．4EffectofpHonammoniaandphosphorusrelease4pH=10pH-。pH=10、115。SCOD。pH=11pH=5Chen1pH=5pH=119。Ca2+。。。De-Bashan10、MAP。Yuan11MAP60mg/L。Mg、NP1∶1∶1Tong12Mg/N=1．8P/N=1．16。2．4pHVSS5。5pHVSSFig．5VSSreductionundervariouspHvalues5VSS062412pHpH=1011VSSVSS36%27%。pH=9VSS26%。pHVSS18%～22%。SCODSCFAsVSSVSSSCODSCFAs。TSSpH=4～1110280、10316、11388、11232、11408、11640、12092、1319611172mg/L。VSSTSS。2．5pHpH2。2pH3Table2ComparisonoffermentationcharacteristicsofthreetypesofsludgeatvariouspHmgCOD/gVSS21℃pH4～11＞pH=1016d256＞120～22℃pH4～11—pH=108d257—535℃pH4～1155℃pH4～11＞pH=95dpH=89d298368—13pH3～11＞pH=105d302＞255℃pH=7911—pH=95d180—1420℃pH=4～11pH=91011pH=1016d117pH=511220～22℃pH=10。。。Liu15。。31pHSCOD。SCODpH=10、11SCOD。2pH=44pH=5～98pH=10、1116。3。4VSSTSS。5pH320～22℃pH=10。1ChenY．G．JiangS．YuanH．Y．etal．HydrolysisandacidificationofwasteactivatedsludgeatdifferentpHs．WaterResearch2007413683-6892WuH．Y．YangD．H．ZhouQ．etal．TheeffectofpHonanaerobicfermentationofprimarysludgeatroom16246temperature．JournalofHazardousMaterials20091721196-2013．pHCOD、．20062771358-1361YuanHongyingZhangHuaxingChenYinguangetal．ImpactofpHonthegenerationofCODphosphorousandammonia-nitrogenduringtheanaerobicfermentationofex-cessactivatedsludge．EnvironmentalScience20062771358-1361inChinese4LiuH．HerbertH．P．Fang．ExtractionofextracellularpolymericsubstancesEPSofsludges．JournalofBio-technology2002953249-2565YuanH．Y．ChenY．G．ZhangH．X．etal．Im-provedbioproductionofshortchainfattyacidsSCFAsfromexcesssludgeunderalkalineconditions．Environmen-talScienceandTechnology20064062025-20296NeyensE．BaeyensJ．CreemersC．．Alkalinethermalsludgehydrolysis．JournalofHazardousMaterials2003971-3295-3147WilsonC．A．NovakJ．T．Hydrolysisofmacromolecularcomponentsofprimaryandsecondarywastewatersludgebythermalhydrolyticpretreatment．WaterResearch200943184489-44988YuG．H．HeP．J．ShaoL．M．etal．Towardunder-standingthemechanismofimprovingtheproductionofvola-tilefattyacidsfromactivatedsludgeatpH10．0．WaterResearch200942184637-46449．．2006272319-323XiaoBenyiLiuJunxin．Studyontreatmentofexcesssludgeunderalkalinecondition．EnvironmentalScience2006272319-323inChinese10De-BashanL．E．BashanY．Recentadvancesinremovingphosphorusfromwastewateranditsfutureuseasfertilizer1997—2003．WaterResearch200438194222-424611YuanQ．BaranowskiM．OoeszkiewiczJ．A．Effectofsludgetypeonthefermentationproducts．Chemosphere2010804445-44912TongJ．ChenY．G．Recoveryofnitrogenandphosphor-usf