A2N连续流双泥系统反硝化除磷脱氮试验研究王亚宜

36　820048　　　　　　　　　JOURNALOFHARBININSTITUTEOFTECHNOLOGY　Vol.36No.8Aug,2004　　　　　　A2N王亚宜1,彭永臻1,2,李探微3,王淑莹2,李勇智1(1.,150090,E-mail:[e-mail];2.,100022;3.,200092)　:研究了基于缺氧吸磷理论开发出的A2N反硝化除磷脱氮新工艺对生活污水氮、磷的去除,重点考察了不同COD/TN、投碳方式及碳源对DNPAOS反硝化吸磷和脱氮的影响.试验结果表明:当进水COD/TN在3.94～7变化时,反硝化除磷较好,除磷率稳定在87.03%～92.95%,脱氮率从80.99%提高到了92.70%;而当COD/TN达到9.6以后,系统脱氮效果稳定在92%以上,除磷率却降至74%以下,TP去除量中反硝化吸磷比率下降,好氧吸磷比率升高;将外碳源投加在缺氧段,只能优先支持反硝化脱氮反应,而对缺氧吸磷有抑制作用.因此,理想的反硝化除磷环境为外碳源(电子供体)和NO3-(电子受体)不能同时存在于一个体系中.A2N双泥系统的建立有利于除磷、脱氮的稳定和高效.:反硝化聚磷菌;反硝化除磷脱氮;A2N双泥系统;COD/TN:X703:A:0367-6234(2004)08-1046-04DenitrifyingdephosphorusremovalinA2Ntwo-sludgeprocessWANGYa-yi1,PENGYong-zhen1,2,LITan-wei3,WANGShu-ying2,LIYong-zhi1(1.SchoolofMunicipalandEnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150090,China,E-mail:[e-mail];2.SchoolofEnvironmentandEnergyEngineering,BeijingPolytechnicUniversity,Beijing100022,China;3SchoolofEnvironmentalEngineering,TongjiUniversity,Shanghai200092,China)Abstract:InvestigatingthenitrogenandphosphorusremovalsituationofdomesticsewageusingtheA2Nprocesswhichwasbasedonthetheoryofdenitrifyingphosphorusremoval.Theexperimentputgreatemphasisontheeffectofdifferentcarbonloadings,carbonsourcesandfilingcarbonmodesonthedenitrifyingdephosphorusefficiency.Theexperimentresultshowed:whenCOD/TNfluctuatedfrom3.94to7,thedenitrifyingdephosphorusremovalwaseffective.Thetotalphosphorusremovalefficiencychangedbetween87.03and92.95%,simultaneouslynitrogenre-movalefficiencyimprovedfrom80.99%to92.70%.However,whenCOD/TNwashigherthan9.6,thenitrogenremovalefficiencywashigherthan92%,butthetotalphosphorusremovalefficiencydeclined(74%),anoxicdephos-phorusratiowasreducedandtheaerationdephosphorusratioroseofoverallTPremovalquantity.Puttingthecarbonsourceintheanoxicreactorwasinfavorofdenitrifyingbutdidharmtoanoxicdephosphorus.Simultaneouspresenceofcarbonandnitratewouldbedetrimentaltophosphorusremoval.Thetwo-sludgesystemwasbenefitialtoim-proveingthesystem'sefficiencyandstability.Keywords:denitrifyingphosphate-accumulatingorganisms;denitrifyingdephosphorusremoval;A2Ntwo-sludgesystem;COD/TN:2003-05-09.:(2003AA601010);(50138010).:(1977-),,;(1949-),,,.　　,:①COD/TN,;②、,,,...2090,[1～3].A2N(/),,“”,,,.1　A2N工艺,,PHB,.,,,.,DNPAOsPHB,NO3-,.:,,.,PHB,.、,DNPAOs.2　试验材料与方法2.1　A2N,———,、、6L、13L、10L2L;7.2L4.9L().———.,、3.SRT12～14d(SRT).DO3～4mg/L,DO2mg/L.2.2　,CODCOD/TN;NaHCO3pH6.8～8,1.,20028.43.2～48L/d,12.9～14.4L/d,11,NDPAOs,.2.1　ρ(CODcr)/(mg·L-1)ρ(BOD5)/(mg·L-1)ρ(NH+4-N)/(mg·L-1)ρ(NO3--N)/(mg·L-1)ρ(TN)/(mg·L-1)ρ(TP)/(mg·L-1)pH/201～537200～43042.5～62.00.56～2.3644～713.78～9.236.84～7.45340～40034923051.21.08566.077.213602　A2N()ρ(COD)/(mg·L-1)/(kg·m-3·d-1)COD/TNTN/TPⅠ(60～88d)()2370.4793.9410.54Ⅱ(89～140d)3710.7046.499.94Ⅲ(141～156d)2510.5064.589.54Ⅳ(157～186d)3850.7777.028.07Ⅴ(197～206d)5041.0189.648.282.3　CODcr;:;:;TN:-;TP:;:;MLSS:;DO、:WTWDO;pHORPWTWlevel2.3　结果与讨论,MLSS4000～4700mg/L,TNTP0.115kg/(m3·d)0.012kg/·1047·8,:A2N(m3·d),COD2.3.1　COD1I～VCOD.,COD,0.479kg/(m3·d)1.018kg/(m3·d),COD.COD7.5～37.6mg/L,26mg/L;COD85.7%～97.7%,94%.1　A2NCOD3.2　2、3I～V、.3.2.1　COD/TN,,,COD/TNA2N.I(COD/TN=3.94):3,Ⅰ,92.87%,TP0.41mg/L,.(A2/O、A/OUCT),COD/TN7～9,[5].A2N,NO3-PHB,,,NO3-;,A2N,34%,NO3-.NO3-,,COD/TN3.94,.COD/TN,ITN80.99%,11.47mg/L,80%NO3--N,NH3--N.IC/N:ICOD,PHB,NO3--N36mg/L,(PHB)(NO3--N),NO3--N.INO3--N,,,SRT,,,NH3--N.　　Ⅱ(COD/TN=6.49):Ⅰ,,Ⅱ,COD371mg/L,COD/TN6.49.,PHB,I(33.83mg/L),,,TP2.53mg/L,NO3--N0.12mg/L,TP0.12mg/L,TN4.18mg/L,NH3--N.COD/TN,、,92.7%97.95%.Ⅴ(COD/TN=9.64):,COD500mg/L,1.018kg/(m3·d),COD/TN9.64,92.99%,(0.13mg/L).COD,TP(13.24mg/L),TP1.69mg/L,TP80.22%,,·1048·　　　　　　　　　　　　　　　　　　　　　36　:①,;②COD,,,,,.,V,,COD/TN,,.,VCOD/TN,,.3.2.2　Ⅱ,,.III100mg/LCOD.NO3--NIII,I(TP7.98mg/L),.,,,,,,.3.2.3　IIIII,IV,.,、,,PHBPHB,.COD384mg/L,II,TP40.81mg/L,TP,NO3-,,,,,TP0.59mg/L,II.,COD,,;A2N,NO3-,,NO3-,,Ⅳ.3.3　NDPAOsNDPAOs,,NDPAOsSVI,72～126mL/g.A2N,,NDPAOs/,,,,ICOD,.4　结　论1)(NDPAOs)NO3-.,,,.2)A2NCOD/TN4～7,C/N.3),,,(),,.4)A2N,,,、,.参考文献:[1]BORTONEG,MARSILILS,TILCHEA,etal.Anoxicphosphateuptakeinthedephanoxprocess[J].WatSciTech,1999,4-5(40):177-185.[2]KUBAT,VANL.M.PhosphorusandnitrogenremovalwithminimalCODrequirementbyintegrationofnitrifi-cationinatwo-sludgesystem[J].WatRes,1996,42(1-2):1702-1710.[3]SORMR,BORTONEG,SALTARELLIR,etal.Phosphateuptakeunderanoxicconditionsandfixed-filmnitrificationinnutrientremovalactivatedsludgesystem[J].WatRes,1996,7(30):1573-1584.[4],.-[M].:,1999.(　刘　彤,姚向红)·1049·8,:A2N