多晶硅电池硝氮废水的处理工艺陈海蓉

32320105　　　　　　　　()JOURNALOFNANJINGUNIVERSITYOFTECHNOLOGY(NaturalScienceEdition)Vol.32No.3May2010doi:10.3969/j.issn.1671-7627.2010.03.017陈海蓉1,2,陆　曦1,孙晓丹1,徐炎华1(1.南京工业大学环境学院,江苏南京210009;2.江苏广播电视大学城科系,江苏南京210017):2009-05-13:“”(2008ZX07101-003);:(1980—),,,,,;(),,E-mail:[e-mail].　:针对环太湖地区多晶硅电池生产企业废水总氮排放超标的情况,采用厌氧反硝化工艺对多晶硅太阳电池硝氮废水的进行处理.通过接种A/O系统的缺氧段污泥,在模拟废水pH为7.0～7.5、温度为(23±2)℃、C∶N=4～6的条件下,运行80d启动厌氧反硝化反应器.结果表明,处理出水符合“太湖地区城镇污水处理厂及重点工业行业主要水污染物排放限值”(DB32/1072—2007)的排放标准.在稳定运行阶段,通过对主要限制因素的条件优化,实现了快速反硝化深度脱氮.:厌氧反硝化;多晶硅电池硝氮废水;启动;脱氮:X172　　　:A　　　:1671-7627(2010)03-0083-05TreatmentofnitratenitrogenwastewaterfrommulticystalinesiliconsolarcellsCHENHai-rong1,2,LUXi1,SUNXiao-dan1,XUYan-hua1(1.CollegeofEnvironmentalEngineering,NanjingUniversityofTechnology,Nanjing210009,China;2.DepartmentofCityandScience,JiangsuCityVocationCollege,Nanjing210017,China)Abstract:AmiedatthemulticystalinesiliconsolarcellsindustryfordischargingthewastewaterwithtotalnitrogenexceedingthestipulatedstandardsintheareaofTaihuLack,severalexperimentsofanaerobicdenitrificationdesignedtoremovenitrogenfromthewashingwastewateroftheacidicethingformulticys-talinesiliconsolarcellswerecarriedout.ByinoculatingwithA/Osystematicoxygen-poorsludge,there-actorwasoperatedundertheconditionsofpHvaluesfrom7.0to7.5,thetemperaturewas(23±2)℃andC/Nwas4to6,thereactorwassuccessfullyrunin80days.TheeffluentqualitywasstabletomeetthecriterionofDB32/1072—2007.Inthesteadyoperationperiod,thequicknitrogenremovalcouldberealizedbytheoptimizationofcontrollingfactors.Keywords:nitratenitrogenwastewaterofmulticystalinesiliconsolarcells;anaerobicdenitrification;set-up;nitrogenremoval;　　,,,[1].,,(DB32/1072—2007),,..[2][3-4].78%N2,.,[5-6].1　1.1　,,HF/HNO3.2,NO-3F-,,HNO3NO,F-;,92mg/L.,F-400mg/L.F-,Ca(PAC),F-3.51mg/L,,.,NO-3.1.2　1.2.1　A/O.1.2.2　[7]、、,SBR,,,,COD..1.3　10L,1.,DO0,..,2,5min,,1h,.,NO-3-N(,,)、NO-2-N(,)COD,NO-x-N(NO-3-NNO-2-N).1.4　1—;2—;3—;4—;5—;6—;7—;8—;9—;10—;11—;12—pH;13—1　Fig.1　Experimentalinstallationchartofthereactor.,HNO3、40～100mg/L、pH=7.0～7.5、(23±2)℃、C∶N(,)=4～6,().,、pH、C∶N,.,pH,pH.1.5　:;:;(1-)-;CODCr:();pH:pHS230pH;MLSS:.2　,pH7.0～7.5、(23±2)℃、C∶N=4～6、80d,.80dρ(NO-3-N)、ρ(NO-2-N)、ρ(NO-x-N)COD2.2:1)5,3.5h,6h0,95.13%,COD61.69%;NO-2-N4h,NO-3-NNO-2-N,.,,84　　　　　　　　()32　2　80dρ(NO-3-N)ρ(NO-x-N)Fig.2　Effectofρ(NO-x-N)ontheincreaseofρ(NO-3-N)in80days.2)7,NO-3-N70mg/L.3.6g/L,NO-2-N3h,.3h,15mg/L,5h98.16%,COD71.68%,,.3)9,NO-3-N100mg/L.4.5g/L,,NO-2-N2h,,4h,0.2.5h,15mg/L,5h,99.7%,COD88.14%.4),pH8.0,NO-2-N,pH,NO-2-N.:pH,.3　3.1　3MLSS(,)5.5g/L、pH=7.0～7.5、C∶N=4、(),,CODNO-x-N,3.3　Fig.3　Effectofremovalrateoffactorsondifferenttemperature,[8].3,(15℃),,CODNO-x-N.20～35℃,15℃[9].,85　3:,,28℃NO-x-NCOD,96%93%.,,,CODNO-x-N.28℃.(28±1)℃.3.2　pH4MLSS5.5g/L、(28±1)℃、C∶N=4、(),pH,4.4　pHFig.4　EffectofremovalrateoffactorsondifferentpHpH.pH,.Sedlak[10],pH,pH,.pH6.5～8.5.4,.COD,NO-2-N.pH=7.5,COD,99%.,pH7.5.3.3　C∶N5MLSS5.5g/L、(28±1)℃、pH7.5、(),(),C∶N,5.5　C∶NFig.5　EffectofremovalrateoffactorsondifferentC∶N5,(),NO-3NO-2,,,86　　　　　　　　()32　COD.C∶N,,,NO-x-N,COD.,C∶N,,,NO-x-N、COD.C∶N4,94.96%,COD.,C∶N4.3.4　ρ(NO-x-N)、ρ(NO-3-N)、ρ(NO-2-N)COD　　6,,NO-3NO-2,(N2N2O).COD,45min,NO-3-N,NO-2,,NO-2-N.NO-3-N,NO-2-N.NO-2-N,NO-2-N,NO-x-N.、pH、C∶N,45min,;60min,COD99%.6　ρ(NO-x-N)、ρ(NO-3-N)、ρ(NO-2-N)CODFig.6　Changeofρ(NO-x-N),ρ(NO-3-N),ρ(NO-2-N)andCODwithtime4　　1)A/O,,,,,,,.,99%,DB32/1072—2007.2),1～2hNO-x-N1mg/L,COD50mg/L.3),,.:[1]　SuminoT,IsakaK,IkutaH,etal.Nitrogenremovalfromwastewaterusingsimultaneousnitratereductionandanaerobicammoniumoxida-tioninsinglereactor[J].BiosciBioeng,2006,102(4):346-351.[2]　DorshelmerWT,DrewryCB,FritschDP,etal.Removingnitratefromgroundwater[J].WaterEngineeringManagement,1997(12):20-24.[3]　FlereJM,ZhangTianC.NitrateremovalwithsulfurLimestoneau-totrophicdenitrificationprocesses[J].JournalofEnvironmentalEngineering,1999,125(8):721-729.[4]　KurtM,DunnIJ,BourneJR.Biologicaldenitrificationofdrink-ingwaterusingautotrophicorganismswithH2inafluidizedbedbiofilmreactor[J].BiotechnologyandBioengineering,1987,29(4):493-501.[5]　BikemO.Batchbiologicaldenitrificationusingarundodonax,glycyrrhizaglabra,andgracilariaverrucosaascarbonsource[J].ProcessBiochem,2006,41(6):1289-1295.[6]　SierraAlvarezR,BeristainCardosoR,SalazarM,etal.Chemo-lithotrophicdenitrificationwithelementalsulfurforgroundwatertreatment[J].WaterRes,2007,41(6):1253-1262.[7]　,.SBR[J].,2005,31(12):67-71.FuYongsheng,ZhuJie.Optimumoperatingconditionsfornitrogenremovalinthemeat-processingwastewaterbySBRprocess[J].TechnologyofWaterTreatment,2005,31(12):67-71.[8]　,.[J].,1997(3):16-20.DuYunhui,LiuYongdi.Studyontreatingwastewaterbydenitrifi-cation[J].EnvironmentHerald,1997(3):16-20.[9]　,,.[M].:,2002.[10]　SedlakRI.Phosphorusandnitrogenremovalfrommunicipalwastewater[M].NewYork:LewisPubishers,1991.87　3: