AAO工艺处理焦化废水简介罗兵

20076·112·(LinhuanCoking&ChemicalCompanyLimited,Huaibei235141,China)Abstract:ThepaperintroducedtherudimentalknowledgeofcokingwastewaterandthebasicprincipleofA-A/Otechnologyfortreatingcokingwastewater.IntegratedwiththepracticeofthecompanybyusingA-A/Otechnologyfortreatingcokingwastewater,introducedthetechnologicalprocessandmaincontrolrequirementduringtheoperationprocess.Theresultsoftheoperationshowedthatthequalityofthedischargedwatercouldliveuptoclass-criteriaspecifiedinintegratedwastewaterdischargedstandard(GB8978-1996),inaddition,anexplanationforthetechnology’sinadequatewasmade.Keywords:cokingwastewaterA-A/Otechnologynitrificationdenitrification[1]A-A/O200m3/h127m3/h27m3/h130m3/h70m3/h12007-02-25(1974-)2007634170·113··Tab.1Infallwaterindexoftreatingstation(mg·L-1)CODCN-NH3-NBOD5pH3200680125020017060069253015003001230100100500692530(1)A/O/(2)(3)1.52.0mg/L0.5mg/LNH4++3/2O2→NO2-+2H++H2ONO-2+1/2O2→NO3-NH4++2O2→NO3-+2H++H2OpH8.08.5(4)5C+4NO3-+2H2O→2N2+4OH-+5CO2NO2-NO3-1Fig.1Technologicalprocessdiagramofphenol-cyanogenwastewatertreatingstation(1)(2)130m3/hNO2-NO3-N220076·114·—NH4+NO2-NO3-(3)CODPFS(PAM)200m3/h(4)Q=23m3/h99.7%Q=23m3/h99.7%97%(5)DODO24mg/L30pHpHpH8.08.5pH6.58.00.51mg/LDON2SSCOD3GB8978-19962·Tab.2Mainwaterqualityindex(mg·L-1)CODCN-NH3-NBOD5S2+NO2-NNO3-N1400.410.434.21251230.82.460A-A/O(1)(2)(3)A/O(4)HCNHCN[1][M]2006311-333[2]A2/O[J]200634648-49