、侯红娟1, 王洪洋1, 周 琪2(1.宝山钢铁股份有限公司环境与资源研究所,上海201900;2.同济大学污染控制与资源化研究国家重点实验室,上海200092) : 对于低碳、高氮磷的城市污水,可采用生物脱氮并辅助化学除磷的工艺进行处理,以使氮、磷同时达到排放标准。选择聚合硅酸铁作为混凝剂并将其直接投加到生物反应器中,结果表明,当投加量为12mg/L(以Fe计)时出水中的TP0.5mg/L,达到了《城镇污水处理厂污染物排放标准》(GB18918—2002)的一级A标准。所投加的聚合硅酸铁与进水中TP的物质的量之比同出水TP之间具有很好的相关性,因而在进、出水TP浓度一定的情况下,可据此确定混凝剂的投量。投加了混凝剂后,污泥絮体变得更密实,沉降性能良好。 :(863)(2002AA601023) : 城市污水; C/N; C/P; 生物脱氮; 化学除磷:X703.1 :A :1000-4602(2007)11-0024-04StudyonSupplementalChemicalPhosphorusRemovalfromMunicipalWastewaterwithLowCarbonandHighNitrogenandPhosphorusHOUHong-juan1, WANGHong-yang1, ZHOUQi2(1.InstituteofEnvironmentandResource,BaoshanIronandSteelCo.Ltd.,Shanghai201900,China;2.StateKeyLabofPollutionControlandResourceReuse,TongjiUniversity,Shanghai200092,China) Abstract: Theprocessofbiologicalnitrogenremovalandsupplementalchemicalphosphorusre-movalcanbeusedtotreatmunicipalwastewaterwithlowcarbonandhighnitrogenandphosphorustosat-isfythedischargestandardsforbothnitrogenandphosphorus.Polyferricsilicatewasusedascoagulantanddosedintothebioreactor.Theresultsshowthatwhenthedosageis12mg/L(asFe),theeffluentTPconcentrationislessthan0.5mg/L,whichachievestheclassⅠ-AcriteriaspecifiedinDischargeStandardofPollutantsforMunicipalWastewaterTreatmentPlant(GB18918-2002).ThereisalinearrelationbetweentheeffluentTPandthemolarratioofthedosageofpolyferricsilicatetotheinfluentTP.Therefore,thedosageofcoagulantcanbedeterminedwhentheinfluentandeffluentTPisknown.Thedosedpolyferricsilicateresultsinmorecompactsludgeflocandfavorablesludgesettleability. Keywords: municipalwastewater; C/N; C/P; biologicalnitrogenremoval; chemicalphosphorusremoval COD(200mg/L),、(COD/TN6,COD/TP50),、。,·24·第23卷 第11期2007年6月 中国给水排水CHINAWATERWASTEWATER Vol.23No.11Jun.2007,,、。,(30min),TP。1 试验材料与方法1.1 ,1。1 Tab.1 Rawwastewaterqualitymg·L-1CODNH+4-NNO-3-NTNTP146~29019.87~35.260~0.8923.56~51.432.45~6.6421624.350.2332.154.151.2 2,5L,1#,2#()。,。:40%,8h,4h(0.5h)、1.5h、1h、0.5h、1h,TN60%,TN《》(GB18918—2002)A。,5~7d,。1.3 COD:;NH+4-N:;NO-3-N:;TN:—;TP:—;TP:、—;DO:;pH:;:。2 结果与讨论2.1 TP(Fe,)TP2。2 TPTab.2 TPremovaleffectunderdifferentdosage2#TP/(mg·L-1)TP/(mg·L-1)/%1#/(mg·L-1)TP/(mg·L-1)/%5.10~6.645.753.19~4.163.8425.37~40.6633.2922.23~3.282.8543.74~57.3850.465.35~5.675.534.08~4.494.3516.07~27.4021.3332.41~2.782.6748.04~57.1251.812.68~5.623.801.84~4.553.141.34~52.9017.4241.11~2.961.8236.07~73.9852.132.45~5.443.851.68~3.552.708.16~44.5729.8760.79~1.581.2355.51~75.1968.203.08~5.734.142.27~3.633.004.55~39.5227.6280.66~1.191.0065.91~82.0975.792.68~5.713.831.99~3.212.5710.82~43.7832.90120.34~0.500.4384.62~92.6488.77 2,TP,TP,20%~30%,1mg/L。,TP。4mg/L,TP;TP,,,,,。12mg/L,TP2.68~5.71mg/L,TP0.5mg/L,《》(GB18918—2002)A。[1],FerH2PO4(OH)3r-1。Fe3+,,FeOOHFerH2PO4(OH)3r-1。,:pH8.0,FerH2PO4(OH)3r-1,(),,;,FeOOH,·25·侯红娟,等:低碳、高氮磷城市污水的化学辅助除磷研究第23卷 第11期;,。,TP(Fe/TP)TP(1),TPTP。1 Fe/TPTPFig.1 RelationbetweenmolarratioofFetoTPandeffluentTP TP,SS。,12mg/L3.60%,SSTP。、SS3。3 SSTab.3 SSineffluentunderdifferentcoagulantdosagemg·L-102346812SS13.29.315.757.015.875.884.21 3,2~12mg/L,SS,SS。[2],SS,,,SS。2.2 ,[3、4]:(a)、Fe3+Fe(OH)3(b)、(c)、(d)。,。12mg/L2、3。2 Fig.2 Componentofphosphorusinsludgewithoutcoagulantdosing3 12mg/LFig.3 Componentofphosphorusinsludgewithcoagulantdosageof12mg/L 2,,,90%;、。,、、、FeFe2+Fe3+,[5]。,1.2~1.5mg/L,0.1mg/L,,0.93,1。,、,、,5.60%。·26·第23卷 第11期 中国给水排水 。2.3 。4(Fe12mg/L)FeCl3。4 、(×1000)Fig.4 SEMphotoofsludgeflocwithoutandwithcoagulantdosing(×1000) 4,,,(EPS),EPS;,Fe(Ⅲ)EPS,Fe(Ⅲ)EPS,Fe(Ⅲ),Fe(Ⅲ),,[2]。FeCl3,[6、7]。,4。4 Tab.4 SVIunderdifferentcoagulantdosage/(mg·L-1)23468122#SVI/(mL·g-1)118140123991051271#SVI/(mL·g-1)128145958475763 结论① ,12mg/L(Fe),TP0.5mg/L,《》(GB18918—2002)A。② TPTP,pH7.5、TP2.5~6.6mg/L,:y=3.7305e-1.2461x,R2=0.9985。③ SS。④ ;,,12mg/L73%。⑤ ,,;FeCl3。:[1] ,.[M].:,1998.[2] ,,,.Fe(Ⅲ)[J].,2003,23(5):582-587.[3]IsoldeRöske,ChristianeSchönborn.Interactionbetweenchemicalandadvancedbiologicalphosphoruselimination[J].WaterRes,1994,28(5):1103-1109.[4] DietrichUhlmann,IsoldeRöske,MichaelHupfer,etal.Asimplemethodtodistinguishbetweenpolyphosphateandotherphosphatefractionsofactivatedsludge[J].WaterRes,1990,24(11):1355-1360.[5] ,,,.[M].:,1991.[6] ,,,.[J].,2004,4(4):22-24.[7] ,,,./[J].,2005,25(4):43-46.:(1975- ), , , , 。:(021)26643990 :2006-12-20·27·侯红娟,等:低碳、高氮磷城市污水的化学辅助除磷研究第23卷 第11期