T型氧化沟提高脱氮效率的技术改造罗建中

3　11环境工程学报Vol.3,No.11200911ChineseJournalofEnvironmentalEngineeringNov.2009T罗建中1　苏伟健1　卢　军1　郭洁茹2(1.,510006;2.,518000)　　BODT。,0.5h1h,tDN/tN0.560.50,NH3-N,。NH3-N15.5mg/L10.4mg/L,(DB44/26-2001);52.1%68.3%,NH3-N;、,。　T　　　　X505　　　A　　　1673-9108(2009)11-1995-05TechnicalmodificationofdenitrificationenhancementinTtypeoxidationditchesLuoJianzhong1　SuWeijian1　LuJun1　GuoJieru2(1.FacultyofEnvironmentalScienceandEngineering,GuangdongUniversityofTechnology,Guangzhou510006,China;2.NanhaiEnvironmentalProtectionBureauofFoshan,Foshan518000,China)Abstract　Thoughprolongingaerationtimeinsideditches,thetechnicalmodificationofTtypeoxidationditchesofBODbiodegradedmodeintheaspectofdenitrificationenhancementwasconstructed.Resultsprovedthat,whenaerationtimeinsideditcheswasincreasedfrom0.5hto1handradioofdenitrificationtimetonitri-ficationtime,tDN/tN,waschangedfrom0.56to0.50,percentageofnitrificationwasincreasedandabilityofdenitrificationofthesystemwasimproved.Aftermodification,concentrationofNH3-Nofoutlet,10.4mg/L,dramaticallylowerthanbefore,15.5mg/L,metdischargedstandardsofGuangdongProvince(DB44/26-2001),anddenitrificationefficiencywasdramaticallyenhancedfrom52.1%to68.3%.TheproblemofhighconcentrationofNH3-Nofoutletinwastewaterplantswassolved.Withlowinvestmentandhighefficiencies,themodificationhascertainofvalueofpopularizationandapplication.Keywords　Ttypeoxidationditches;denitrification;modification;aerationtime:2008-11-27;:2009-03-10:(1958～),,,。E-mail:[e-mail]　　1988,(passveer),1t/d。1992,T,1.5t/d。,、,BOD,,COD,,。,,,,。A2O、CASS[1],TA2OCASS,,。,,。。,T[2～5];,,T。,,3,。1　T3,3,74m×12m,3m,7800m3,,。,,,,。35cm,,,4,24m,2,1,1。,,,,N、P,BOD,,,,NH3-N。1　TFig.1　OperationofTtypeoxidationditches　　T6,8h,1。0.704m3/(m2·h),BOD0.052kg/(kg·d),4000～6000mg/L,2000～3000mg/L,31d,18.7d。20032。1　Table1　Operationconditionsbeforeandaftertechnicalmodifications123456(h)2.50.51.02.50.51.0(h)2.51.00.52.51.00.5ⅠⅡⅢ2　2003Fig.2　Resultsofmonthlyoutletsin20032　,NH3-N,,。20035(DB44/26-2001)(20mg/L)。,,,。,1;2[6]。COD,,NH3-N40%～50%,,COD,。,。,199611:T、。,,,OXI330,15cm,DO2mg/L,[7]。COD,,,1mg/L,。。,COD,,NH3-N。3　[8～10]T,tDN/tN;tDN/tN,。tDN/tN0.40,,,tDN/tN0.40,。,tDN/tN0.56,tDN/tN。,2,SS,,,。tDN/tN,。,2.5h,1.0h,0.5h(1)。tDN/tN0.50。4　4.1　COD,2004NH3-NCOD2～5,。23,45。2、3、45COD273.1、202.5、269.3259.8mg/L,COD26.5、28.4、24.222.7mg/L。2、3、45CODT,2。,COD,COD,COD,COD90%,,COD。COD3。2　CODtTable2　ResultsofT-testaboutCOD24t34t25t35tCOD360.182372.562＊＊340.735352.482＊＊COD361.643373.280＊＊341.780＊354.743＊＊COD360.579375.288＊＊341.435355.892＊＊　　t(34)0.05=1.691;t(35)0.05=1.69;t(36)0.05=1.688;t(37)0.05=1.687;＊t(34)0.025=2.032;t(35)0.025=2.03;t(36)0.025=2.028;t(37)0.025=2.026;＊＊3　20042～5CODFig.3　CODofdailyoutletsfromFeb.toMayin20044.2　SS2～5SS168、181、182168mg/L,SS19、19、2015mg/L,2、34、5SST,3。2～5SS,SS,SS,SS88%,。,,。SS4。199733　SStTable3　ResultsofT-testaboutSS24t34t25t35tSS360.874370.229340.018350.575SS361.232371.087343.435＊＊353.237＊＊SS360.720370.863341.881＊351.459　　t(34)0.05=1.691;t(35)0.05=1.69;t(36)0.05=1.688;t(37)0.05=1.687;＊t(34)0.025=2.032;t(35)0.025=2.03;t(36)0.025=2.028;t(37)0.025=2.026;＊＊4　20042～5SSFig.4　SSofdailyoutletsfromFeb.toMayin20044.3　NH3-N2～5NH3-N31.0、33.4、32.832.7mg/L,2、34、5NH3-NT,4。,4NH3-N,。NH3-N5。5,4、5NH3-N2、3。NH3-N15.5、15.4、10.410.3mg/L,NH3-N50.3%、53.9%、68.3%68.4%。2、34、5NH3-N、NH3-NT(4),5　20042～5NH3-NFig.5　NH3-NofdailyoutletsfromFeb.toMayin20044、5NH3-N2、3,NH3-N15.5mg/L10.4mg/L,52.1%68.3%。4、5NH3-N(DB44/26-2001)(20mg/L)。2004,。CODNH3-N1～5,NH3-N,COD40mg/L,SS20mg/L,NH3-N11mg/L,,。4　NH3-NtTable4　ResultsofT-testaboutNH3-N24t34t25t35tNH3-N361.778＊370.652341.371350.568NH3-N364.363＊＊378.365＊＊344.299＊＊357.917＊＊NH3-N365.766＊＊375.341＊＊345.874＊＊355.455＊＊　　t(34)0.05=1.691;t(35)0.05=1.69;t(36)0.05=1.688;t(37)0.05=1.687;＊t(34)0.025=2.032;t(35)0.025=2.03;t(36)0.025=2.028;t(37)0.025=2.026;＊＊199811:T5　5、。,4645kWh5005kWh(、,24h)。()0.8126/,1.5t,0.310/m3,0.2517/m3;0.334/m3,0.2714/m3。0.0197,NH3-N15.5mg/L10.4mg/L,16.2%,68.3%,;,,。5　Table5　Listofmainequipment(kW)EH-130011.1EH-80010.7MF-16(2)、MF-6(2)425LB-30041.130041.1ZXNJ-14、ZXNJ-1220.55()GTA-100/35s-H1525()GTA-100/50s-H11030DEK2502111　　:、,。6　　T:(1),,0.5h1.0h,tDN/tN0.50,NH3-N,。(2)NH3-N15.5mg/L10.4mg/L,(DB44/26-2001);52.1%68.3%,NH3-N,NH3-N。(3),,0.0197,,;,、。,,,。[1],,.———、、.:,2004.57～64[2],,..,2008,23(4):96～98[3],..,2006,25(6):64～67[4]..,2005,27(2):13～18[5],..,2003,19(12):94～96[6],..:,2003.6～7[7],,.().:,1999.183～185[8],.2.,1998,19(2):27～30[9],..,1998,18(3):210～212[10],,,..,1997,13(5):4～71999