改性硅酸钙对养殖废水厌氧除磷过程中污泥特性的影响

103Vol．10No．320163ChineseJournalofEnvironmentalEngineeringMar．20161213*1．2141222．2141013．215009-modifiedcalciumsilicateMCS。MCSMCS、EPSZetaMCS。MCSK7.8×105MCSD8072.46%72.97%、EPS11%、Zeta－19.8mV－3.6mVMCS。ZetaX522A1673-9108201603-1235-06EffectofmodifiedcalciumsilicateonphosphorateremovalduringanaerobictreatmentprocessoflivestockwastewaterTianYanwei1MiXun2YanQun131．SchoolofEnvironmentandCivilEngineeringJiangnanUniversityWuxi214122China2．XishanEnvironmentalProtectionBureauWuxi214101China3．JiangsuCoorperativeInnovationCenterofWaterTreatmentTechnologyandMaterialsSuzhou215009ChinaAbstractTheremovalofphosphorusPusingmodifiedcalciumsilicateMCSduringtheanaerobictreatmentoflivestockwastewaterwasinvestigatedinthisstudy．Firstlytheadsorptionmechanismforofphos-phatebyMCSwasperformedaccordingtothetheoryofprecipitation-dissolution．Thentheparticularsizeextra-cellularpolymericsubstanceEPScontentsandtheZetapotentialprofileoftheanaerobicgranularsludgewereallcomparedwithorwithouttheadditionofMCStotwoparallelupflowanaerobicsludgeblanketUASBreac-tors．ItwasfoundthattheprecipitatetransformationofMCSforphosphatewasstrongestastheequilibriumcon-stantKreached7．8×105.ImportantlyofnotetheremovalrateoftotalphosphorousTPandchemicaloxygendemandCODreached94．52%and96.83%respectivelyEPScontentincreasedby11%andtheZetapo-tentialofanaerobicsludgedecreasedfrom19.8mVto3.6mVwiththeadditionofMCS．Itappearedthatnoton-lythesizeofsludgeandtheactivityofthesludgewereenhancedbutthegranulationtimeofsludgewasalsoshortened．Keywordslivestockwastewatermodifiedcalciumsilicatecarbonandphosphorusremovalsludgeparti-clesZetapotentialBK2012558JHB2011-292011ZX07301-0022014－12－242015－02－021987—。[e-mail]*[e-mail]、330±260mg/L12-3。4-6。modifiedcalci-umsilicateMCS7。108-9。extracellularpolymericsubstancesEPS、。EPS。EPSEPSEPS10。EPS。Zeta11。。ZetaZeta。EPSZetaMCS。11.1MCS、、12。1.22UASBU-1U-21.5m0.1m12L。30℃6h。UASB。。COD7500～8500mg/LTP80～100mg/LTN300～400mg/LSS950～1300mg/LpH7～8。U-1U-2MCSMCS6g/dTP73g/d1～20d6g/d21～60d60d。1.31COD、TP、TN13。2EPS14。-PS14PN13。EPSVSS。3BT-2003。U-1U-2。4MCSZetaZetaZetaPALS。U-1U-2MCSpH7、7.5、8-。MCS＜30mS/cm3。22.1MCS1。CODTP7533.3682.78mg/LU-1COD、TPCOD、TP453.68mg/L、46.63mg/L93.98%、43.67%U-2COD、TPCOD、TP238.32mg/L、4.54mg/L96.83%、94.52%。U-1TP43.67%U-2MCSTP90%MCS。TN354.06mg/LU-1、U-2TN102.3090.51mg/LTN71.11%74.44%。U-2TNU-13.33%MCSTN。-1632131Fig.1PerformanceofreactorsK2。K15。3CaSiO3s+2PO3－4aq幈幇KCa3PO42s+3SiO2－3aq1K=cSiO2－33cPO3－42=Kθ3spCaSiO3KθspCa3PO42=1.56×10－232×10－29=7.8×1052KθspCaSiO3KθspCa3PO42。cCa2+、cSiO23cPO3－4Ca2+、SiO23PO34。1MCSTable1SolubilityproductsandequilibriumconstantsofinsolublecompoundsKCa3PO422×10－297.8×105CaF22×10－11930CaCO33.36×10－97.44CaC2O44×10－96.25CaSO43.16×10－70.079CaCrO47.1×10－43.5×10－5MCSK1。1KPO3－4＞F－＞CO2－3＞C2O24＞SO24＞CrO2－4。MCS。1U-2MCS1MCS1MCS。2.22。UASBU-1U-250.1350.01μm。20U-1U-2、D8080%59.24、93.35μm69.95μm、112.40μm60dU-1U-2、D8067.95、102.45μm86.42、135.40μm。2Fig.2AveragesizeandsizedistributionofgranularsludgeinreactorsU-2D8027.18%32.16%MCS732110D8072.46%72.97%20dU-2U-160dMCSU-2。CaCO3、Ca3PO42、CaSiO316。U-2MCS。2.3EPSEPS3。3U-1、U-2EPS11.43μg/g、11.56μg/g154.32μg/g、150.70μg/g。U-1EPS11～15μg/g50168.97μg/gU-2EPS2021.02μg/g163.54μg/g50EPS173.20μg/g30.76μg/g。3EPSFig.3EPSprofileduringanaerobictreatmentoflivestockwastewaterU-2MCSEPSEPS10。MCS17。2.4ZetaMCSUASBpH6～8Zeta4。CSZeta18-19MCSZetapH8.55mV3。OH－SiO－320Zeta。CS-MCS-4ZetaFig.4Zetapotentialofcalciumsilicatebeforeandaftermodification5Zeta。540U-1Zeta20.1mV11.8mV60dU-2MCS20dZeta19.8mV10.8mVU-1Zeta3.5mV。MCSZeta。ZetaMCSZetaZetaMCS。MCS。832135ZetaFig.5ProfileofZetapotentialduringanaerobictreatmentoflivestockwastewater3MCSUASB1MCSMCSMCS。2MCSUASB。3MCSEPSEPS。4。1SuzukiK．WakiM．YasudaT．etal．Distributionofphosphoruscopperandzincinactivatedsludgetreatmentprocessofswinewastewater．BioresourceTechnology2010101239399-94042LiuYinghaoKwagJ．H．KimJ．H．etal．Ｒecoveryofnitrogenandphosphorusbystruvitecrystallizationfromswinewastewater．Desalination20112771-3364-3693OkanoK．UemotoM．KagamiJ．etal．Noveltech-niqueforphosphorusrecoveryfromaqueoussolutionsusingamorphouscalciumsilicatehydratesA-CSHs．WaterＲesearch20134772251-22594．SBＲ．2010491932-1936QinDetaoChenMeixueDingＲanetal．LivestockwastewatertreatmentbySBＲwithexternalcarbonsourceadditioncontrolledbyreal-timestrategy．ChineseJournalofEnvironmentalEngineering2010491932-1936inChinese5PetzetS．CornelP．Preventionofstruvitescalingindi-gesterscombinedwithphosphorusremovalandrecovery-TheFIX-phosprocess．WaterEnvironmentＲesearch2012843220-2266KoderaH．HatamotoM．AbeK．etal．Phosphatere-coveryasconcentratedsolutionfromtreatedwastewaterbyaPAO-enrichedbiofilmreactor．WaterＲesearch20134762025-20327．．201535567-70TianYanweiShaDehongGaoFengetal．StudyonthephosphateremovalintheprocessofanaerobictreatmentofswinewastewaterusingmodifiedcalciumsilicateMCS．IndustrialWaterTreatment201535567-70inChi-nese8．．200716102-108DongChunjuanLüBing’nan．Characteristicresearchofanaerobicgranules．ChineseJournalofEnvironmentalEngi-neering200716102-108inChinese9GallardoＲ．FariaC．ＲodriguesL．Ｒ．etal．Anaerobicgranularsludgeas