高硝酸盐地下水离子交换再生液的生物脱硝及循环利用李琪

95Vol．9No．520155ChineseJournalofEnvironmentalEngineeringMay.2015121*111．1100162．100049TiO2α-Fe2O30.5mol/L0.25mol/LSOC、。75mmol/Lα-Fe2O3TiO22.330.93gNO－3-N/L·d67%10。X523A1673-9108201505-2303-07Denitrifyingtreatmentandrecycleofregenerationbrineinion-exchangeprocessofnitrate-elevatedgroundwaterLiQi12HuangBin1ChenXin1ShiYi11．StateKeyLaboratoryofForestandSoilEcologyInstituteofAppliedEcologyChineseAcademyofSciencesShenyang110016China2．UniversityofChineseAcademyofSciencesBeijing100049ChinaAbstractTomitigatetheenvironmentalimpactofnitrate-concentratedspentbrineproducedfromionex-changetreatmentofnitrate-polluteddrinkingwatersalt-tolerantgranularactivatedsludgepromotedwithTiO2orhematiteα-Fe2O3wasusedtobiologicallytreatnitrate-concentratedartificialspentbrinecomposedof0．5mol/Lsodiumchlorideand0．25mol/Lsodiumbicarbonate．TheeffluentafterposttreatmenttoremovesolubleorganiccarbonSOCsuspendedsolidandmicroorganismeffectivelywasrecycledtoregenerateresin．Resultshowsthatthetwotypesofgranularsludgecantreatspentbrinecontainingnitrateupto75mmol/Landthehematite-promotedgranularsludgehadadenitrificationcapacityof2．33gNO－3-N/L·dmuchhigherthanthat0．93gNO－3-N/L·doftheTiO2-promotedgranularsludge．Theadditionofcalciumchlorideinthedeni-trificationeffluenttoformcalciumcarbonateflocculationcanremovebiogenicalkalinityand67percentofsolubleorganiccarbonproducedinthedenitrification．Theeffluentaftergranularactivatedcarbonfiltrationandozonedisinfectioniscapableofrecycleatleast10timesforresinregenerationwithoutreducingitscapacityforprocess-ingnitrate-pollutedrawwater．Thisstudyachievesthepurposeofbiologicaltreatmentandrecycleofnitrate-con-centratedspentbrineproducedfromresinregeneration．Keywordsionexchangespentbrinegranularactivatedsludgerecycle2014－04－082014－05－261990—。[e-mail]*[e-mail]1。、29、345、。155m3/h250t21m31.4L6。。、7。、、8、、9SBR。、、10、11α-Fe2O3TiO2。、、。、、、12、13。、。---。11．11．1．10.8cm1m30.7g717bedvolumeBV50mL。1．1．2pH7．3、、、0.8、3.2、2.11.7mmol/L。1．1．3500mmol/L、250mmol/L、15～75mmol/L、25mmol/L、1mmol/L25mmol/L。1．1．41．1．30mmol/L。1．1．59cm1m5.4L。、2∶1∶2。N2、CO230L/min10min24s10∶120∶1pH8.3～8.6。25±2℃COD/TN3．7。。1．1．614cm58cm125mL/min。1．1．7N628Ⅲ×0．8Ⅵ0.2g/h。1．1．8、、、、、、。1．21．2．1SBR1．1．3。、、、。5min40%。、403253∶1。。3mmol/L、0.2mmol/L。35min。2SBRA、B、、、、。A16gTiO2、B150mL2%α-Fe2O3SOCNO－20、300500mmol/L615mmol/L、。。、、8。62.575mmol/L、。1．2．2、、、1415。、16。、1．1．5、。1．2．31．1．20.7mmol/L。1．2．4、、、、。1．1．3B1．1．4、。5mmol/L6BV/h1h12min200μS/cm。1．2．5、、ISO-900pHThermomodel868pHTSS、VSSmultiN/C3100。1．31。、、、、。1Fig．1Experimentaldevice5032922．12．1．1Cang17NaCl15g/L5h30g/LNaCl500mg/L。。50dAMLSS5.75g/LMLVSS2g/LSV3031.2%SVI54.3mL/gBMLSS14.75g/LMLVSS4.5g/LSV3012.5%SVI8.5mL/gMLSS2～4g/LSVI100～150mL/g10。Lehman15VSS1g/L。、B。、23。6mmol/L15mmol/L40%15mmol/L37.5mmol/L、612d。15mmol/L18h、0.4mmol/L26mmol/L、Fig．2Variationofnitrateandnitriteconcentrationsduringacclimationatinitialnitrateconcentrationof6mmol/L37.5mmol/L13h。315mmol/L、Fig．3Variationofnitrateandnitriteconcentrationsduringacclimationatinitialnitrateconcentrationof15mmol/L2．1．2。、25mmol/L30mmol/L40%62.5mmol/L75mmol/L。、45。45BAB3～6hA12～14h62.5mmol/LB8mmol/L10hAB24h75mmol/LB13mmol/L20hAB27h2mmol/L。α-Fe2O3BTiO2A60325、、、、。425mmol/L、Fig．4Variationofnitrateandnitriteconcentrationsduringoperationatinitialnitrateconcentrationof25mmol/L530mmol/L、Fig．5Variationofnitrateandnitriteconcentrationsduringoperationatinitialnitrateconcentrationof30mmol/L45A0.93gNO－3-N/L·d、B2.33gNO－3-N/L·d100%。Bae182．2gNO－3-N/L·d80%。Lehman15100%0．45gNO－3-N/L·d。BA。α-Fe2O3TiO21920。α-Fe2O3α-Fe2O3。2．2。、、、、21。22。。B6。67%90%18%～20%2324。89%。、。。25。2%24。--91%20%～77%24-26。703296SOCFig．6EffectofstepbystepposttreatmentonSOCremovalinbiologicallytreatedbrine2．31．1．31．1．47。7Fig．7Effectsofrecycledbrineonresinregenerationandexhaustion790%96%。10%4%。Lehman152010mg/L。20%、50%、90%17。31、、75mmol/Lα-Fe2O3、TiO22.33gNO－3-N/L·d。2、67%、91%。310。1．-．20104112449-2454DongMeiyingAnYiLiQianqianetal．Studyofinflu-entialelementsonnitratereductionbynanoscaleironparti-clesintegratedwithmicroorganisms．ChineseJournalofEn-vironmentalEngineering20104112449-2454inChinese2．．20102954-10ZhangLihuiCaoGuominShengMeietal．Progressof80325thetechnologicalprocessesfornitrateremovalingroundwa-ter．WaterPurificationTechnology20102954-10inChinese3．．201130590-94CaoGuominShengMeiFeiYuleietal．Treatmentofgroundwatercontaminatedbynitratewithionexchangeprocesses．WaterPurificationTechnology201130590-94inChinese4．．200524334-37MengFanshengWangYyeyaoXueYonghai．Removalofnitrateinthedrinkingwater．WaterPurificationTechnolo-gy200524334-37inChinese5CliffordD．A．LiuX．Ionexchangefornitrateremoval．JournalofAmericanWaterWorksAssociation1993854135-1436LauchR．P．GuterG．A．Ion-exchangefortheremovalofnitratefromwellwater．JournalAmericanWaterWorksAs-sociation198678583-887．．2010263291-294CheChunbo．Treatmentofregenerationwasterwaterofion-exchangeresinwithprecipitationmethod．JournalofHarbinUniversityofCommerceNaturalSciences2010263291-294inChinese8McAdamE．J．JuddS．J．Biologicaltreatmentofion-ex-changebrineregenerantforre-useAreview．SeparationandPurificationTe