改良型氧化沟脱氮除磷的正交试验研究李艳平

:2011-5-29:(07276713D):(1979-),,,,,。:1673-9469(2011)03-0042-05李艳平1,刘强2,李思敏3(1.,071000;2.,072550;3.,056038):通过正交试验研究了溶解氧(DO)、污泥浓度(MLSS)、污泥回流比(R)对改良型氧化沟脱氮除磷效果的影响。极差分析结果表明,影响CODCr、TN、TP去除率各因素的重要性顺序分别为:DOMLSSR、DORMLSS、MLSSRDO。方差分析结果表明,DO和MLSS对脱碳具有较显著的影响,DO对脱氮具有较显著的影响,MLSS、R对除磷具有较显著的影响。改良型氧化沟脱氮除磷的最佳运行工况为氧化沟缺氧区DO=0.3～0.5mgL、好氧区DO=2.0～2.5mgL,MLSS=5000mgL,污泥回流比R=65%。:溶解氧;污泥浓度;污泥回流比;改良型氧化沟;脱氮除磷:TG333.17　　　　　　　　:AOrthogonaltestonnitrogenandphosphorusremovalofimprovedoxidationditchLIYan-ping1,LIUQiang2,LISi-min3(1.DepartmentofArchitecturalEngineering,CollegeofScienceandTechnology,NorthChinaElectricPowerUniversity,HebeiBaoding071000,China;2.BureauofHousingandUrban-RuraldevelopmentofXushuiCounty,HebeiBaoding072550,China;3.CollegeofUrbanConstruction,HebeiUniversityofEngineering,HebeiHandan056038,China)Abstract:Theeffectsofdissolvedoxygen(DO),mixedliquidsuspendedsolids(MLSS)andsludgereturnratio(R)onnitrogenandphosphorusremovalofimprovedoxidationditchwerestudiedthroughorthogonalexperimental.TheresultsofrangeanalysisshowthattheimportancesequencesofthefactorsinfluencingtheremovalofCODCr,TN,TPareDOMLSSR,DORMLSS,MLSSRDO,respectively.Theresultsofvarianceanalysisshowthat,DOandMLSShavesignificantinfluenceondecarburization,andDOalsohassignificantinfluenceonnitrogenremoval,MLSSandRhavesignificantinfluenceonphosphorusremoval.Intheend,itisobtainedthat,thebestoperatingconditionsofimprovedoxidationditchfornitro-genandphosphorusremovalisthattheconcentrationofanoxiczoneandaerobiczoneofimprovedoxidationditchwas0.3to0.5mgLand2.0～2.5mgL,MLSSis5000mgL,sludgereturnratioRis65%.Keywords:dissolvedoxygen;mixedliquidsuspendedsolid;sludgereturnratio;modifiedoxidationditch;nitrogenandphosphorusremoval　　、。;CN、CP、pH;、(HRT)、(θc)、(MLSS)、、(R)[1-6]。,,。(DO)、(MLSS)、(R),,。28　3　　　　　　　　　　　　　(　　　　)　　　　　Vol.28　No.320119　　　　　Journal　of　Hebei　University　of　Engineering(NaturalScienceEdition)　　　　　Sept.201111.1,,,1。3.2×104m3,9.0m,81.00m,4.0m。1.2,1,,T=16℃-26℃,pH=7.0-8.3。,2。1Tab.1Experimentalwaterquality　　　　mgLCODCrBOD5SSNH4+-NTNTP74539278237.8590.8611.8575628612.3437.601.8942424040524.3666.675.492Tab.2MonitoringitemsandmethodsofthetestpHPHBJ260PHPHBJ260PHTPHBJ260PHPHBJ260PHDOYSIMODEL52YSIMODEL52SSDR-2500();10mL;CODCrET3150B,2010BOD5HACHBOD5NH4+-N2010,25mLNO3--NHACHNO3-NTKN(+),2010,25mLTP—,2010,25mL3:431.3,,。DO:DO,,(45%-60%),。TN30%-40%,,,[7-9]。,DO,,TN,,、,;DO,NOx-N。,,DO,、0.2-0.3、1.5-2.0,0.3-0.5、2.0-2.5,0.5-0.7、2.5-3.0mgL。MLSS:、、,、,,,。,(、,),、,MLSS。,4500、5000、5500mgL。(R):(MLSS),。,,,(R)。、,[10]。(R)25%-50%[11],、、,,,DO,,DO。,R,[11]。R,,。,50%、65%、85%。,,DO、MLSS、R3,3,3。22.1Rij,,。4。3Tab.3Factors-levelsoforthogonaltest(A)DOmg.L-1(B)MLSSmg.L-1(C)R%10.2～0.31.5～2.045008520.3～0.52.0～2.555006530.5～0.72.5～3.050005044　　　　　　　　(　　　　)2011　　4,RijCODCr、TN、TP:DOMLSSR、DORMLSS、MLSSRDO。2.25。5,CODCr,DO,DO,,,、,。,MLSS4Tab.4Orthogonaltestresultsofoxidationditchandranganalysis—A(DOmg.L-1)B(MLSSmg.L-1)C(R%)(%)CODCrTNTP10.2～0.31.5～2.0450018585.7648.1773.6320.2～0.31.5～2.0550026578.7451.2384.6230.2～0.31.5～2.0500035084.1346.6885.7140.3～0.52.0～2.5450025089.5453.1384.8550.3～0.52.0～2.5550038585.5756.7981.5660.3～0.52.0～2.5500016593.3060.7392.8770.5～0.72.5～3.0450036590.4151.2982.4380.5～0.72.5～3.0550015085.6244.1587.1690.5～0.72.5～3.0500028591.6655.7286.60CODCrk1j82.8888.5788.2387.66k2j89.4783.3186.6587.48k3j89.2389.7086.7086.43R1j6.596.391.581.23TNk1j48.6950.8651.0253.56k2j56.8850.7253.3654.42k3j50.3954.3851.4947.99Rkij8.193.652.346.43TPk1j81.3280.3084.5580.60k2j86.4384.4585.3686.64k3j85.4088.3983.2385.91Rij5.118.092.136.045Tab.5OrthogonaltestresultsofoxidationditchandvarianceanalysisSjfjSjFCODCrA(DO)83.8945241.947211.2110B(MLSS)69.7265234.86329.3177C(R)2.663121.3316e4.820122.4100F0.05(2,2)=19.00,F0.1(2,2)=9.00TNA(DO)112.1505256.075212.5168B(MLSS)25.7103212.85522.8695C(R)73.1412236.57068.1631e8.9624.48TPA(DO)43.7584221.87926.3455B(MLSS)98.1918249.095914.2390C(R)65.2558232.62799.4628e6.89623.4483:45,MLSS,,,,MLSS,。TN,DO,R,MLSS。,DO,。,R,,。4、5,MLSS,,MLSS,。,;,,,。,,,NO3--N。TP,MLSS、R,DO。4,MLSS,MLSS,SrinzthFinstein,[1]。R,R,NO3--N,BOD,BOD,,;R,,,。DO,,DO,,。,、:DO=0.3-0.5mgL、DO=2.0-2.5mgL,MLSS=5000mgL,R=65%。3　　1)RijCODCr、TN、TPDOMLSSR、DORMLSS、MLSSRDO。DOMLSS,DO,MLSS、R。2),:DO=0.3-0.5mgL、DO=2.0-2.5mgL,MLSS=5000mgL,R=65%。:[1].Carrousel[J].,2003,19(12):101-102.[2],,.[J].,2003,19(2):75-76.[3],,,.Carrousel[J].,2006,7(12):42-45.[4],.HRT、、、[J].,2003,25(5):78-86.[5]ROSENC,INGILDSENP,GUILDALT,etal.Introducingbiologicalphosphorusremovalinanalternatingplantbymeansofcontrol:afullscalestudy[J].WaterScienceTechnology,2003,53(4-5):133-141.[6],,,.THRN、P[J].,2007,33(4):408-412.[7]BYAMMARY,JARADAIDEH.Simultaneousnitrificationanddenitrificationinanoxidationditchplant[J].ChemicalBio-chemicalEngineeringQuarterly,2005,19(2):207-212.[8]FITERM,COLPRIMJ,POCHM,etal.Enhancingbiologi-calnitrogenremovalinasmallwastewatertreatmentplantbyregulatingtheairsupply[J].WaterScienceTechnology,2003,48:445-452.[9]INSELG,ARTANN,ORHOND.Effectofaerationonnu-trientremovalperformanceofoxidationditchsystems[J].En-vironmentalEngineeringScience,2005,22(6