地埋式一体化生物滤池的低温运行特性曹大伟

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曹大伟1, 李 伟2, 李先宁2, 花蓉蓉3(1.无锡市惠山区建设局,江苏无锡214174;2.东南大学能源与环境学院,江苏南京210096;3.同济大学城市污染控制国家工程研究中心,上海200092)   : 以地埋式一体化生物滤池为研究对象,分析了该工艺在低温条件下(10℃)对农村生活污水中有机物及氮、磷的去除特性。研究表明,地埋式一体化生物滤池对COD的去除效果受温度的影响小,冬季低温条件下仍能维持较好的去除效果,对COD的平均去除率达73.3%。而该工艺的脱氮除磷效果受温度的影响显著,低温条件下对NH+4-N和TN的平均去除率仅分别为66.8%和48.1%。对于低温条件下处理农村生活污水的工艺而言,是硝化作用不完全导致了脱氮效率的下降,而溶解氧水平并不是限制硝化过程的主要因素。  : 农村生活污水; 生物滤池; 低温; 脱氮:X703  :A  :1000-4602(2009)11-0033-04OperationCharacteristicsofBuriedIntegratedBiofilterProcessatLowTemperaturesCAODa-wei1, LIWei2, LIXian-ning2, HUARong-rong3(1.WuxiHuishanDistrictConstructionBureau,Wuxi214174,China;2.CollegeofEnergyandEnvironment,SoutheastUniversity,Nanjing210096,China;3.NationalEngineeringResearchCentreforUrbanPollutionControl,TongjiUniversity,Shanghai200092,China)  Abstract: Takingtheburiedintegratedbiofilterprocessasresearchobject,theremovaloforganicmatters,nitrogenandphosphorusfromruraldomesticsewageinthisprocessatlowtemperatures(lessthan10℃)wasstudied.TheresultsshowthattemperaturehaslittleinfluenceontheremovalefficiencyofCOD.AhighCODremovalrateof73.3%isachievedinwinter.However,temperaturehasasignificantinfluenceontheremovalofnitrogenandphosphorus.Atlowtemperatures,theremovalratesofNH+4-NandTNareonly66.8%and48.1%respectively.ThedecreaseinnitrogenremovalefficiencyisaresultofincompletenitrificationandnotDO.  Keywords: ruraldomesticsewage; biofilter; lowtemperature; nitrogenremoval  :(863)(2002AA601012-1A); (2005012)  ,,、、/[1~6]。,。,A/O,、,[7]。,·33·25 1120096            CHINAWATERWASTEWATER             Vol.25No.11Jun.2009、,。1 研究方法1.1 1。1 Fig.1 Schematicdiagramofburiedintergratedbiofilter,,、,,,2.5m3/d。1.5m×1.2m×2.5m,1.9m,。1.5m×1.2m×2.3m,,PVC。120cm,13~15mm,,10cm40~50mm。1.5m×1.2m×1.15m,,5m。,、100L/h。,。,。,(3∶1),。,。1.2 、COD、NH+4-N、TNTP。,CODCTL-12COD,DO,NH+4-N、NO-3-N、TN、TP、、—[8]。1.3 15。2007810—1031,20071125—1225。(10℃),,()。、1。1 、Tab.1 Characteristicsofruraldomesticsewageinwinterandsummer COD/(mg·L-1)NH+4-N/(mg·L-1)NO-3-N/(mg·L-1)TN/(mg·L-1)TP/(mg·L-1)/℃pH46.9~162.115.7~52.30.5~1.516.8~59.00.6~1.620.0~27.16.8~7.3101.129.00.933.81.223.57.1149.1~347.965.5~81.51.3~3.268.0~85.02.5~3.94.8~9.26.9~7.5273.772.12.676.32.96.57.12 结果和讨论2.1 ,COD2。2,COD。COD46.9~162.1mg/L,COD75.3%;COD149.1~347.9mg/L,COD73.3%,。·34·25 11                           CODFig.2 CODremovalatlowtemperature  [9],10℃,,,。6.5℃,,,,,(BOD5300mg/L)[10],,。,,,。,,COD。2.2 NH+4-NTN3、4。3 、NH+4-NFig.3 NH+4-Nremovalinwinterandsummer4 、TNFig.4 TNremovalinwinterandsummer3、4,。,NH+4-NTN87.0%64.8%;,NH+4-NTN66.8%48.1%,,NH+4-NTN20.2%16.7%。、NH+4-N、NO-3-NTN2。2 、Tab.2 Nitrogendistributionininfluentandeffluentmg·L-1NH+4-NTNNO-3-N[NH+4]0[NH+4]eΔ[NH+4][TN]0[TN]e[NO-3]0[NO-3]e23.83.120.728.810.10.96.972.124.148.076.339.42.615.1 : []0;[]e;Δ[]、。  ,NH+4-NNH+4-NTN。,NH+4-NTN,。30.7%,61.2%,30.5%。NO-3-N(Δ[NH+4]+[NO-3]0-[NO-3]e)/[TN]0,,TN,。51.0%,46.5%,4.5%。,/,。,TNNH+4-N16.7%20.2%,,。,、[NH+4]e/[TN]e(Δ[NH+4]+[NO-3]0-[NO-3]e)/[TN]0·35·:25 11,NH+4-N。[11],,,,,。,DO。,DO6.25~7.21mg/L,6.75mg/L;DO9.41~10.74mg/L,10.10mg/L。DO,,DO,DO。,,。2.3 TPTP5。5 TPFig.5 TPremovalinwinterandsummerTP。TP0.6~1.6mg/L,71.4%;TP2.5~3.9mg/L,62.4%。TP:①;②;③。,,。3 结论① COD,(10℃),73.3%,。② 。,NH+4-NTN66.8%48.1%。③ ,,。:[1] ,,.[J].,2006,25(S2):680-682.[2] ,,,.[J].,2005,21(7):111-115.[3] VanCS,SiegristR,LoganA,etal.Hydraulicandpuri-ficationbehaviorsandtheirinteractionduringwastewatertreatmentinsoilinfiltrationsystems[J].WaterRes,2001,35(4):953-964.[4] ,,,.[J].,2006,26(3):404-408.[5] ,,,.[J].,2002,23(6):57-61.[6] ,,,.[J].,2008,24(17):6-9.[7] ,,,.[J].,2008,24(1):30-34.[8] .(4)[M].:,2002.[9] ,,.[J].,2003,21(1):10-13.[10] .(2)[M].:,1993.[11] ,.(2)[M].:,2002.:(1982- ), , , , , 。E-mail:caodavy@gmail.com:2009-01-15·36·25 11                          

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