不同外加碳源的反硝化效能与技术经济性分析杨敏

　Vol.36　No.11　2010125　　··杨　敏　孙永利　郑兴灿　李鹏峰(,　300074)　　　低温季节,很多污水处理厂普遍面临外投碳源提高脱氮效率的问题。碳源不同,其反硝化效能和投加成本也不同。基于低温季节常用强化脱氮工艺———A/O工艺,通过静态试验,对三种常用快速外加碳源(乙醇、乙酸和乙酸钠)的反硝化效能进行了研究,并对其投加成本进行了分析。结果表明:三种外加碳源乙醇、乙酸和乙酸钠的反硝化COD/TN分别为4.85、3.52和3.66;其单位NO-3—N去除量的投加成本分别为15.08元/kgNO-3—N、15.20元/kgNO-3—N和28.98元/kgNO-3—N;从技术经济性考虑,乙酸是最佳的投加碳源。　A/O工艺　外加碳源　反硝化效能　COD/TN　技术经济性Denitrificationefficiencyandtechno-economicanalysisofdifferentexoticadditionalcarbonsourceYangMin,SunYongli,ZhengXingcan,LiPengfeng(NationalEngineeringTechnologyResearchCenterofUrbanWaterandWastewater,Tianjin300074,China)Abstract:Inlowtemperatureseason,manywastewatertreatmentplantswillmeettheproblemthatexoticadditionalcarbonsourceshouldbeaddedtoenhanceefficiencyofnitrogenremoval,whiledifferentcarbonsourceshavedifferentdenitrificationefficencyandcost.Inthispaper,basedontheenforcednitrogenremovalprocess-A/Oprocesswhichiscommonlyusedinlowtemperatureseason,denitrificationefficencyofthreetypesofcommonfastexoticadditionalcarbonsources(ethanol,aceticacidandsodiumacetate)werestudiedbystaticexperimentandtheircostwasanalyzed.Theresultsshowedthat:theCOD/TNfordenitrificationofethanol,aceticacidandsodiumacetateasthreetypesofexoticadditionalcarbonsourcewere4.85,3.52and3.66,respectively;theadditioncostofethanol,aceticacidandsodiumacetateasthreetypesofexoticadditionalcarbonsourcewithperNO-3—Nremovalwas15.08YUAN/kgNO-3—N,15.20YUAN/kgNO-3—Nand28.98YUAN/kgNO-3—N,respectively;consideringthetechnicaleconomy,thebestexoticadditionalcarbonsourcewasaceticacid.Keywords:A/Oprocess;Exoticadditionalcarbonsource;Denitrificationefficiency;COD/TN;Technicaleconomy0　,“”(2006BAC19B05);(863)(2009AA063802)。,。,,。,[1]。DOI:10.13789/j.cnki.wwe1964.2010.11.012126　　　Vol.36　No.11　2010、,,。,,[2]。:、、。,。[2～9],、,、。———A/O,,(、),,。1　A/O300%,3∶1。,,A/O,(C2H5OH、CH3COOHCH3COONa),30mg/LCODCr,,。1。1　COD/g/gCOD/g/gC2H5OH2.091.44CH3COOH1.070.76CH3COONa0.780.60　　40.3L,0.9L,320.8mg/LC2H5OH、39.5mg/LCH3COOH50mg/LCH3COONa,,NO-3—N,180min,12℃。2。2　CODCr/mg/LTN/mg/LTP/mg/LCOD/TNMLSS/g/LMLVSS/g/L21039.33.095.37.384.442　2.1　1～4。　Vol.36　No.11　2010127　　1～4,,,,[10～12]。3。3　/mgNO-3/(gVSS·h)/min/mgNO-3/(gVSS·h)/min/mgNO-3/(gVSS·h)1.50150.77750.59C2H5OH　2.26601.32300.79CH3COOH6.80151.29750.87CH3COONa7.70151.21750.79　　3,,,,C2H5OH、CH3COOHCH3COONa,1.5、4.55.1,C2H5OH、CH3COOHCH3COONa,,CH3COOHCH3COONaC2H5OH,CH3COOH,,,CH3COONa,CH3COOH,C2H5OHCH3COOH,[13,14]。COD,,,,。,CH3COOHCH3COONa,C2H5OH4,CH3COOHCH3COONa,C2H5OH。,,90min。1～4,,,180min,NO-3—N7.39mg/L,C2H5OH、CH3COOHCH3COONaNO-3—N13.58mg/L、15.91mg/L15.59mg/L,CH3COOH,CH3COONa,C2H5OH。,,。4。4　NO-3—N/mg/LCODCr/mg/LNO-3—NCODCr/g/gC2H5OH6.19304.85CH3COOH8.52303.52CH3COONa8.20303.66　　4,NO-3—NCODCr2.86g/g,,[5]。CH3COOHNO-3—NCODCr,COD/TN,,CODCr,CH3COOH。,COD/TN,NO-3—N。IAWQ1[15]:COD/NO-3—N=2.86(1-YH),YH。YH,COD/TN,YH,COD/TN。YH5。5　C2H5OHCH3COOHCH3COONaYH0.410.190.22　　5,CH3COOHYH,COD/TN,。2.2　,,,6。128　　　Vol.36　No.11　20106　C2H5OHCH3COOHCH3COONa·3H2O/%959958～60(CH3COONa)　NO-3—NCODCr/g/g4.853.523.66　CODCr/g/g　1.440.760.60　NO-3—N/g/g　3.374.6310.17//t425032502850　NO-3—N//kgNO-3—N　15.0815.2028.98TN/mg/L555　//m37547601449　　6,,,,YH,3。,,,,,,。3　(1)C2H5OH、CH3COOHCH3COONaNO-3—NCODCr,COD/TN,4.85、3.523.66,CH3COOHCOD/TN,,C2H5OHCOD/TN,。(2)C2H5OH、CH3COOHCH3COONaNO-3—N15.08/kgNO-3—N、15.20/kgNO-3—N28.98/kgNO-3—N,TN5mg/L,C2H5OH、CH3COOHCH3COONa754/m3、760/m31449/m3,,。(3),,,、、。参考文献1　NybergU,AnderssonB,AspegrenH.Long-tremexperienceswithexternalcarbonsourcesfornitrogenremoveal.WatSciTech,1996,33(12):109～1162　,,..,2009,35(6):820～8243　,,,..,2009,30(1):108～1134　..,1993,15(2):40～455　,,,..,2004,30(1):15～186　,,..,1996,22(7):26～297　ChristenssonM,lieE,WelanderT.Acomparisonbetweenethanolandmethanolascarbonsourcesfordenitrification.WatSciTech,1994,30(6):83～908　IsaacsSH,HenzeM,SoebergH,etal.Externalcarbonsourceadditionasameanstocontrolanactivatedsludgenutrientremovalprocess.WatRes,1994,28(3):511～5209　,,..,2008,18(35):100～10110　,,,.A/O.,2008,26(3):56～5811　BarnardJL.CutPandNwithoutchemicals.WaterandWastesEng,1974,11(7):33～4812　EkamaGA,DoldPL,MaraisGVR.ProceduresfordetermininginfluentCODfractionsandthemaximumspecificgrowthrateofheterotrophsinactivatedsludgesystem.WatSciTech,1986,18(6):91～11413　,,,..,2007,26(6):37～4114　.:[].:,200715　HehzeM,GradyCPLJR,GujerW,etal.ActivatedsludgemodelNO.1.(IAWPRCscientificandtechnicalreportNO.1).London:IAWPRC,1987　　&:30007499E-mail:[e-mail]:2010-07-01