常温条件下两级曝气生物滤池启动及短程硝化研究

37EnvironmentalScience&Technology37720147Vol.37No.7Jul.2014王振1，2，肖文胜2*，杨嘉谟1，吕继良2，李振华21.4300742.435003COD176～353mg/LNH4+-N56～175mg/L0.03～0.09m/h、DO、FAFNANO2--N。6～10℃≥22℃NO2--N13～18.2℃6～10℃BAFNDO2.43～4.75mg/LNO2--N65.8%NH4+-N84.1%FA、FNANOBNO2--N0.10mg/L≤FA≤8.77mg/L0.069mg/L≤FNA≤0.249mg/LNO2--N67.7%56.9%NO2--N10hBAFNNH4+-N80%17hNO2--N82.5%74.5%。NO2--NX703.1Adoi10.3969/j.issn.1003-6504.2014.07.0131003-6504(2014)07-0066-06ResearchonStart-upandShort-cutNitrificationofTwoStageBiologicalAeratedFilteratNormalTemperatureWANGZhen12XIAOWensheng2*YANGJiamo1LYUJiliang2LIZhenhua21.SchoolofEnvironmentalandCivilEngineeringWuhanInstituteofTechnologyWuhan430074China2.SchoolofEnvironmentalScienceandEngineeringHubeiPolytechnicUniversityHuangshi435003ChinaAbstractAtwo-stageup-flowbiologicalaeratedfilterwithceramsiteandnaturalzeolitewasusedtotreatsimulationwastewatertheinfluentCODandNH4+-Nconcentrationswere176~353mg/Land56~175mg/Lrespectivelyhydraulicloadingwasfrom0.03to0.09m/htheinf1uenceofwatertemperaturedissolvedoxygenDOfreeammoniaFAfreenitrousacidFNAandbackwashtonitriteaccumulationwerestudied.Resultsshowedthatnitriteaccumulationachievedat6℃~10℃and≥22℃butfailedat13℃~18.2℃.TheoptimalDOconcentrationrangeofBAFNat6℃~10℃wasfrom2.43to4.75mg/LwithaveragenitriteaccumulationefficiencyandNH4+-Nremovalefficiencyas65.8%and84.1%respectively.InadditionFAandFNAhavetheinhibitoryeffectonnitriteoxidizingbacteriatheoptimalFAandFNAconcentrationrangewasfrom0.10to8.77mg/Landfrom0.069to0.249mg/Laveragenitriteaccumulationefficiencywas67.7%and56.9%respectively.Backwashingisfavorablefornitriteaccumulation.NH4+-NtotalremovalefficiencyofBAFNincreasedto80%after10hofbackwashing.Themaximumnitriteaccumulationefficiencywas82.5%after17hwhichwassignificantlyhigherthan74.5%ofpre-backwashing.Keywordstwo-stagebiologicalaeratedfilternormaltemperaturenaturalzeolitenitriteaccumulationbackwashing。30℃[1]。30℃。BAFN《》[e-mail]*[e-mail]。7、、DOpH、“”、——DO。11.1试验材料1.1.11。5mm200mm1000mm31.4L。、、、、3mm200mm600mmBAFC3～5mm8.3LBAFN3～5mm10.5L100mm200mm。1.1.2、NH4Cl、、Na2CO3、NaHCO3。COD176～353mg/LNH4+-N56～175mg/LpH7.5～8.5。Na2CO3NaHCO3pH。[2]1。1Table1ThecompositionandcontentoftraceelementsKH2PO4MgSO4·7H2OZnSO4·5H2OCaCl2·2H2OCuSO4·5H2OFeSO4·7H2OH3BO3/mg·L-1451181211.2分析方法[3]CODNH4+-NNO2--NN-1--NO3--NDOpH。22.1试验的挂膜启动8～15℃[4]。BAFCBAFNCOD、NH4+-N。10～15℃BAFCCOD286.3～435.8mg/LNH4+-N23.1～35.7mg/LBAFNCOD44.8～231.2mg/LNH4+-N21.5～46.75mg/L。1/3BAFCDO7.51～9.01mg/LBAFNDO2.24～4.07mg/L。10d。8～10℃0.03m3/m2·hCOD1.01kg/m3·dNH4+-N0.82kg/m3·dpH7.5~8.5。15d2、3。COD90%COD40mg/LNH4+-N80%NH4+-N30mg/L。25d。2.2温度对短程硝化的影响5℃～45℃20℃～35℃15℃37[5]。。Balmelle[6]10℃~20℃FANO2--NFA。pH7.5~8.5COD1.01～2.02kg/m3·dNH4+-N0.14～1.18kg/m3·d120dNO2--NNO3--N14、5。ηNO2--N=ρNO2--N/[ρNO2--N+ρNO3--N]14、535～406.3～10℃NO2--NNO3--N5～30NO2--N65%78.6%35～406℃NO2--N48%。45～8013～18.2℃NO2--NNO3--NDO、pH、、NO2--N。85～12022℃～28℃NO3--N9736mg/LNO2--N。6～10℃≥22℃。DO、pH13～18.2℃。2.3DO对短程硝化的影响DOSND[7]。DONO2--N。DONO2--NKo＝0.2～0.4mg/LKo＝1.2～1.5mg/L[8]DODONO2--N。OLANDDODONH4+-N。DO。6～10℃pH7.5~8.5COD1.53～2.02kg/m3·dNH4+-N70.82～1.18kg/m3·d。BAFCDO≥8mg/LBAFNZBAFDOBAFN3#DO。ZBAF3#DONO2--NNH4+-N6、7。6DO1.23～3.68mg/LNO2--N65.8%DO≥4.75mg/LNO2--NDO6.86mg/LNO2--N27%。DONO2--NDONH4+-NDO7DO1.23～1.73mg/LNH4+-N60%DO≥1.87mg/LNH4+-N2.43～6.86mg/LNH4+-N80%BAFNDO2.43～4.75mg/LNO2--N65.8%NH4+-N84.1%。2.4FA和FNA对短程硝化的影响freeammoniaFAnitriteoxidizingbacteriaNOBammoniaoxidizingbacteriaAOB0.1～1.0mg/L10～150mg/LFA6mg/LNOBfreenitrousacidFNANO2--NFNANOBAOB0.02mg/L0.4mg/L[9]。FAFNA23[10]。FA=1714×ρNH4+-N-10pHexp6334273+T+10pH2FNA=4614×ρNO2-exp-2300273+T×10pH325～26.8℃COD1.53～2.02kg/m3·dNH4+-N0.82～1.18kg/m3·dBAFCNa2CO3NaHCO3BAFNpHBAFNNH4+-NFA、FNANO2--N8~11。378pHNH4+-NpHNH4+-NpH5.5NH4+-N50.7%。9pH7～9NO2--N70%。pHNO2--N。pHpH7～9。10、11pH9.119.67FA15.843.9mg/LNO2--N57.4%45.3%pH6.245.51FNA0.250.70mg/LNO2--N56.9%28.2%。FA、FNAAOBNOB。pH6.86～8.78FNA0.0013～0.0691mg/LFA0.10mg/L≤FA≤8.77mg/LNO2--N67.7%。0.10mg/L≤FA≤8.77mg/LFANOBAOBNO2--NFA。pH6.866.24FA0.04mg/LFANOBNO2--N56.9%。pHFANOB0.069mg/L≤FNA≤0.249mg/LFNANOBNO2--NFNA。2.5反冲洗对短程硝化的影响。TSS。。。[11]3d。[12]63%89.5%。[13]45.93%64.80%。5.31L/m2·s0.88L/m2·s3～5min5～7min9～13min。2L/hBAFNNH4+-NNO2--N。12、13。12NH4+-N“”0.5hNH4+-N58mg/LNH4+-N40.6mg/LNH4+-N66.8%2hNH4+-N10hNH4+-N56.8mg/LNH4+-N33.5mg/LNH4+-N80%。NH4+-N“”NH4+-NNH4+-N7。131hNO2--N74.5%1hNO2--N44.6%3～11hNO2--N70.3%。17hNO2--N82.5%74.5%。NOBAOBAOBDONOBAOBNOB。NOBNO2--N。31DO、pH6～10℃≥22℃NO2--N13～18.2℃。2DO6～10℃BAFNDO2.43～4.75mg/LNO2--N65.8%NH4+-N84.1%。3pHDO25～26.8℃BAFNpH5.5NH4+-N50.7%NH4+-NpH7～9mg/LNO2--N70%。FA、FNANOBNO2--NpH6.86～8.780.10mg/L≤FA≤8.77mg/LFANOBAOBNO2--NFANO2--N67.7%pH6.24～6.860.069mg/L≤FNA≤0.249mg/LFNANOBNO2--NFNANO2--N56.9%。4NO2--N5.31L/m2·s0.88L/m2·s10hBAFNNH4+-N80%17hNO2--N82.5%74.5%。[][1]HellingaCSchellenAAJCMulderJWetal.TheSHARONprocessaninnovativemethodfornitrogenremovalfromammonium-richwastewater[J].WaterScienceandTechnology1998379135-142.[2].[J].2009295133-142.ZhangYuxiuZhangWeiweiXueTaoetal.Comparisonofcultivatedwaysofdenitrifyingphosphorusremovelsludgeusingnitriteaselectr