倒置A2O工艺的短程生物脱氮中试付国楷

A2/O付国楷,　周　琪,　杨殿海,　邱兆富,　徐晓宇(同济大学污染控制与资源化研究国家重点实验室,上海200092)　　　:　在中试规模的倒置A2/O工艺中,考察了通过控制溶解氧浓度实现短程硝化反硝化的效果。试验表明,在溶解氧为0.30.8mg/L的条件下,可以实现短程硝化反硝化,平均亚硝化率可达64.5%,对TN的平均去除率为66.8%,但易导致严重的污泥膨胀;在低氧(DO=0.30.8mg/L)与常氧(DO=1.62.5mg/L)模式交替运行的条件下,可以维持稳定的短程硝化反硝化,平均亚硝化率可达48.4%,对TN的平均去除率为64.3%,对TP的平均去除率可达38.5%,污泥的SVI控制在112mL/g左右。　　:　短程硝化反硝化;　倒置A2/O工艺;　低C/N值;　城市污水:X703.1　　:A　　:1000-4602(2006)17-0038-04PilotScaleTestonShort-cutNitrificationandDenitrificationinInvertedA2/OProcessFUGuo-kai,　ZHOUQi,　YANGDian-hai,　QIUZhao-fu,　XUXiao-yu(StatekeyLabofPollutionControlandResourceReuse,TongjiUniversity,Shanghai200092,China)　　Abstract:　Theshort-cutnitrificationanddenitrificationinthepilotscaleinvertedA2/OprocessbycontrollingtheDOconcentrationwasinvestigated.ResultsshowthatwhentheDOis0.3-0.8mg/L,theshort-cutnitrificationanddenitrificationoccurs.Theaveragenitrosationrateis64.5%andtheaver-ageremovalrateofTNis66.8%,however,thesludgebulksseverely.Underthealternativeoperationfromlowlevelofoxygenconcentration(DO=0.3-0.8mg/L)tonormallevel(DO=1.6-2.5mg/L),thestableshort-cutnitrificationanddenitrificationlastswiththeaveragenitrosationratebeing48.4%.TheremovalratesofTNandTPcanreach64.3%and38.5%respectivelywiththeSVIofa-round112mL/g.　　Keywords:　short-cutnitrificationanddenitrification;　invertedA2/Oprocess;　lowC/Nratio;municipalwastewater　　:“”(2002AA601023)　　[1、2],[38],A2/O。,。1　材料与方法1.1　,1。,A2/O38第22卷　第17期2006年9月　　　　　　　　　　　　中国给水排水CHINAWATERWASTEWATER　　　　　　　　　　　　　Vo.l22No.17Sep.2006(Ⅰ),;,(Ⅴ),,。1。1　Fig.1　Schematicdiagramofpilot-scalereactorsystem1　Tab.1　Designsizeandusefulvolumeofeverycell××/(m×m×m)/m3/m3(Ⅰ)0.7×1.0×3.02.10(Ⅱ)1.94×1.0×3.05.82(Ⅲ)2.0×1.0×3.06.00(Ⅳ)6.3×1.0×3.018.9(Ⅴ)1.6×1.0×3.04.837.62　　Ø2.85m×2.0m,12.75m3。1.2　,,、,2。2　Tab.2　Characteristicsofinfluentwastewater/℃18.329.8pH7.17.4COD/(mgL-1)121.4SS/(mgL-1)50.4PO3-4-P/(mgL-1)2.88TP/(mgL-1)3.48NH+4-N/(mgL-1)28.6NO-2-N/(mgL-1)0.08NO-3-N/(mgL-1)1.08TN/(mgL-1)31.9COD/TN3.8COD/TP391.3　DO/:WTWOxi330iDO,2/d;pH:WTWpH330ipH,2/d;SS:(103-105℃),2/;COD:,NH+4-N:,NO-2-N:N-(1-)-,NO-3-N:,TN:—,PO3-4-P:,TP:—,MLSS:(103105℃),2d。1.4　20056,:HRT=8h,SRT=22d,R=100%,DO=2.5mg/L,MLSS=2250mg/L,50%,50%;0.16kgCOD/(kgMLSSd),0.043kgTN/(kgMLSSd)。。,2005816914(Ⅳ)DO0.30.8mg/L,(Ⅴ),DO2.23.0mg/L,。。9151116,/:DO0.30.8mg/L,;DO1.62.5mg/L,。DO2.2-3.0mg/L,。/。2　结果与分析2.1　,、、2。2　Fig.2　VariationsofNH+4-N,NO-2-NandNO-3-Natlowoxygenconcentrationcondition39第17期付国楷,等:倒置A2/O工艺的短程生物脱氮中试第22卷2,,,,850%,,83.4%,65%,。,,。,,(SVI284mL/g),SS。,,。2.2　/,/。、、3,SVISS4。3　/Fig.3　VariationsofNH+4-N,NO-2-NandNO-3-Natlow/normaloxygenconcentrationcondition4　/SVISSFig.4　VariationsofSVIandeffluentSSatlow/normaloxygenconcentrationcondition3、4,,,。5/。5　/Fig.5　VariationsofNH+4-N,NO-2-N,NO-3-NandTNalongtheprocessatlow/normaloxygenconcentrationcondition5,;,;,,61.2%;,48%。2.3　3、/。3,18.329.8℃,CODNH+4-N。,COD。64.5%,187mL/g,SS16mg/L;/48.4%,112mL/g,,SS12mg/L。,/TN15%,TN10mg/L,。,,TN,,。,,,(27.6%)。/,,40第17期　　　　　　　　　　　　　　　　　　　中国给水排水　　　　　　　　　　　　　　　　　　第22卷(38.5%),,2.14mg/L。3　Tab.3　Effluentqualityatthreeoperatingconditions(n=22)(n=9)/(n=18)COD/(mgL-1)39.644.827.142.248.323.741.245.830.5SS/(mgL-1)82061632412225NH+4-N/(mgL-1)0.831.2700.863.2800.660.920NO-2-N/(mgL-1)0.090.180.056.8410.822.315.528.821.97NO-3-N/(mgL-1)10.616.86.875.628.622.765.8210.82.34TN/(mgL-1)15.819.89.8410.615.26.4011.416.27.24PO3-4-P/(mgL-1)2.033.341.192.123.441.281.823.240.64TP/(mgL-1)2.473.491.042.523.621.432.143.470.98MLSS/(mgL-1)224729701764196624671528212432341486SVI/(mLg-1)10413678.418728413611217875.9NO-2-N∶TN/%0.64.20.164.583.436.148.479.123.8TN/%50.570.420.666.878.640.264.381.833.6TP/%2958.4027.654.7038.570.45.6　:。3　结论①　A2/O,。②　,,。③　,,。④　、(COD/TN=3.8),A2/O,TN64.3%,TP38.5%,,。:[1]　.[J].,1999,25(2):11-13.[2]　JinD,WangBZ,WangL.Designandoperationofa　　awastewatertreatmentplanttreatinglowconcentrationofmunicipalwastewater[J].WaterSciTechnol,1998,38(3):167-172.[3]　.[J].,2000,26(5):1-4.[4]　.[J].,2000,26(6):32-34.[5]　.A2/O[J].,2003,16(2):65-67.[6]　,.A2/O[J].,2000,16(7):11-15.[7]　,,,.2[J].,2003,23(3):332-337.[8]　,,.—[J].,2000,16(2):29-31.:(1979-　),　,　,　,　。E-mail:[e-mail]:2006-03-0641第17期付国楷,等:倒置A2/O工艺的短程生物脱氮中试第22卷