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37420164ENVIＲONMENTALSCIENCEVol．37No．4Apr．20161212121212121．2150092．215009．．F－．F－750mg·L－1F－．F－800mg·L－193d50mg·L－190%5kg·m3·d－1．70%100%．X703A0250-3301201604-1467-05DOI10．13227/j．hjkx．2016．04．0352015-11-162015-12-015147828451408387CXLX14_12891984～E-maillixiang@mail．usts．edu．cnFeasibilityandEconomicAnalysisofDenitrificationofPhotovoltaicWastewaterContainingHighFluorineLIXiang12ZHULiang12HUANGYong12YANGPeng-bing12CUIJian-hong12MAHang121．SchoolofEnvironmentalScienceandEngineeringSuzhouUniversityofScienceandTechnologySuzhou215009China2．InstituteofEnvironmentalBiotechnologySuzhouUniversityofScienceandTechnologySuzhou215009ChinaAbstractInordertoreduceacidandalkalidosinginwastewatertreatmentprocessofpolycrystallinesiliconbyusingdenitrificationafterfluorideremoval．Thisexperimentstudiedthefeasibilityoffirstremovingnitrogenusingthedenitrificationprocessbystart-updenitrifyingreactorbeforefluorideremoval．TheresultsshowedthattheF－concentrationinthewastewatertohadacertaininfluenceonthedenitrification．WhentheconcentrationofF－wascontrolledtoabout750mg·L－1theactivityofdenitrifyingbacteriawasnotsignificantlyinfluencedwhentheconcentrationofF－continuedtoincreasethedenitrificationefficiencyofdenitrifyingsludgegraduallyreduced．InwastewatertreatmentofpolycrystallinesiliconiftheconcentrationofF－waskeptbelow800mg·L－1thedenitrificationperformanceofdenitrifyingsludgewasnotobviouslyaffected．After93doperationthetotalnitrogenineffluentwasstabilizedbelow50mg·L－1thetotalnitrogenremovalefficiencyreached90%andtheremovalratereached5kg·m3·d－1．Thecalculationresultshowedcomparedwiththeconventionaldenitrificationprocessafterfluorideremovaltheproposedprocesscouldsaveabout70%ofacidand100%ofalkalidosinggreatlyreducingthecostofwastewatertreatment．Keywordspolycrystallinesiliconslicewastewaterdenitrificationbeforefluorideremovaleffectoffluorideeconomicanalysis．、．F－NO－320%80%pHF－、NO－3-N12．NO－3-N3～56．F－78．pH9～10910F－20mg·L－1．Glass11pH7.5～9．pH12pHpH．．．pH．37．F－．F－．11.112L．50r·min－1．．25～28℃．1.2UASB2～3mmMLVSS/MLSS0.70200g．1.3F－NaNO31Fig．1Schematicdiagramofthedenitrificationreactor．1．CTOC/N01%．1Table1MainqualityindexesofcleaningwastewaterNO－3-N/mg·L－1NO－2-N/mg·L－1F－/mg·L－1TOC/mg·L－1pH442.80±37.020781.9±54.6401.95±0.421.413．NO－3-N、NO－2-N、F－TOCMultiN/C3100TOCpHPHS-3TCpHSS、VSS．1.5F－9250mL25℃pH7．2.5h75%F－．NO－3-N50±5mg·L－1TOC85±5mg·L－1CTOC/N1.41415．9F－0、375、750、900、1050、1125、1350、15001875mg·L－12.5h．NO－3-NF－．31．NO－3-NNO－3-NNO－3-N2NO－3-NpHF－409±24.08mg·L－13pH、C/N．22.1F－F－．F－．2F－750mg·L－1F－F－．F－900mg·L－10.35kg·m3·d－10.19686414kg·m3·d－145%F－．F－．F－槡1875mg·L－10.065kg·m3·d－181.4%．F－750mg·L－1F－．F－700～800mg·L－1．F－120g·L－1．2NＲＲFig．2VariationsofNＲＲduringdenitrificationbatchtests2.233．10～33dCTOC/N1.2～1.5．24dNO－3-N50mg·L－1400mg·L－1NO－3-N0.54kg·m3·d－14.36kg·m3·d－1．8dNO－3-N10mg·L－140mg·L－14kg·m3·d－1．234～43d33dNO－3-N50%NO－3-NF－400mg·L－1．．NO－3-NNO－3-N92.33%±5.34%50mg·L－1F－400mg·L－13NO－3-NFig．3ＲemovalperformanceofNO－3-Nduringdenitrification．344～93dNO－3-NF－750～800mg·L－1．NO－3-N10mg·L－197%．F－．．61d2.22h1.56hNO－3-N．72dNO－3-N100mg·L－1．73dHＲT1.75h70～93d10mg·L－120mg·L－1DB32/1072-2007．2.3VFATOC3%4a．6dTOC90%．37dTOC50mg·L－1．90%．1gNO－3-N1.07gTOC2.86gCOD1gNO－3-NNO－2-N0.43gTOC14．TOCNO－3-NΔTOC/ΔNO－3-N1.24b．TOC/NO－3-N1.3～1.4TOC50mg·L－19641374TOCΔTOC/ΔNO－3-NFig．4VariationsofTOCandΔTOC/ΔNO－3-Nduringdenitrification．16COD/TN5.3TOC/N1.87ΔTOC/ΔNO－3-N1.1～1.2COD．6Fig．6Nitrogenandfluorineremovalprocess2.4pHNO－3-NpH．17pH7.5～8.5．pHpH34dNO－3-NpH4.17pH7.55．pH2pH．pH91819．3pH5.5pH．5pH5kg·m3·d－1pH8.5～9．5NＲＲNLＲpHFig．5VariationsofNＲＲorNLＲandpHatdifferentstages3、．20～236aCaOH2pH11～12CaCl2Ca2+F－．pH9～10．pH07414pH．F－750mg·L－1201510606141.26b．pH5～5.5pH9～10．70%100%．41F－750mg·L－1F－750mg·L－1F－0.35kg·m3·d－1F－1875mg·L－10.065kg·m3·d－181.4%．2700～800mg·L－1．93d5kg·m3·d－1．1．J．201546565-68．2．J．200735652-53．3．J．20062791781-17854．J．2008275596-599．5．J．2012313731-737．6SahinkayaEDursunNKilicAetal．Simultaneousheterotrophicandsulfur-oxidizingautotrophicdenitrificationprocessfordrinkingwatertreatmentControlofsulfateproductionJ．WaterＲesearch201145206661-6667．7．J．200319238-42．8．J．201032383-87．9．2F－J．2014403103-105110．10．J．200916258-61．11GlassCSilversteinJ．DenitrificationkineticsofhighnitrateconcentrationwaterpHeffectoninhibitionandnitriteaccumulationJ．WaterＲesearch1998323831-839．12．J．20132911205-210．13．M．．2002．14TakekawaMParkGSodaSetal．SimultaneousanammoxanddenitrificationSADprocessinsequencingbatchreactorsJ．BioresourceTechnology2014174159-166．15．J．2009301108-113．16．J．201231399-103．17．pHJ．2014136616-622．18．CaCl2-PACJ．2015941837-1841．19．J．20102620353-356．20．、J．201434581-83．21．J．201434790-92．22．J．2009354116-119．23．J．20122820129-132．1741