高浓度冷轧硅钢片乳化液废水絮凝实验研究许劲

201812·56·(140004524000453200120440004554000456210046)[](COD37g/LpH=6.5~8.5)(PAC)(PAC+(PAM))PAC3500mg/LPAM15mg/LpH7.5COD654mg/LCOD98.3%PAC2250mg/LpH7.0PAC(PAC+PAM)CODPAM(PAC+PAM)[](PAC)(PAM)[]TQ[]A[]1007-1865(2018)12-0056-03ResearchontheFlocculationExperimentofHighConcentrationColdRolledSiliconSteelEmulsionWastewaterXuJing1,2,HeYuqian1,2,ZhangChen1,2,WeiYing3,ChenJing4,5,LiSen6,ChenSiyu1,2(1.SchoolofUrbanConstructionandEnvironmentalEngineering,ChongqingUniversity,Chongqing4000452.KeyLaboratoryoftheThreeGorgesReservoirRegion'sEcologicalEnvironment,MinistryofEducation,ChongqingUniversity,Chongqing4000453.ShanghaiAOJOAEcologyandEnvironmentTechnologyCo.,Ltd.,Shanghai2001204.TheFacultyofArchitectureandUrbanPlanning,ChongqingUniversity,Chongqing4000455.MountainousAreaurbanConstructionandNewTechnology,KeyLaboratoryofMinistryofEducation,ChongqingUniversity,Chongqing4000456.NanjingLyudaoEnvironmentalEngineeringCo.,Ltd.,Nanjing210046,China)Abstract:Asiliconsteelplantdischargeshigh-turbidityhigh-concentrationemulsionwastewater(COD37g/L,pH=6.5~8.5).Thecommissioningsiteintendstoadopttwokindsofflocculationmethodstotreattheemulsionwastewater,separatelyadditionpolyaluminumchloride(PAC)andmixingadditionPAC+polyacrylamide(PAM).Throughsinglefactorexperimentsandorthogonalexperiments,theoptimalflocculationconditionswereasfollows:PACdosage3500mg/L,PAMdosage15mg/L,pHvalue7.5,theCODofemulsionwastewaterdecreasedto654mg/L,theremovalrateofCODwas98.3%;theemulsiondemulsificationwastewaterconditionsPACdosage2250mg/L,pH7.0;ComparedwithPAC+PAMalone,theresultsshowedthatalthoughtheeffectofPACcoagulationisobvious,itissuggestedthatPAC+PAM).Keywords:emulsionwastewaterpolyaluminumchloride(PAC)polyacrylamide(PAM)flocculationexperimentdemulsificationconditionsCOD37g/LpH6.5~8.5[1][2]Fenton[3][4][3][5]PACpH60%PAC[6]PAC[7]PACpH(PAC+PAM)pHPACPAM11.1PAC(28%5%)PAM(12002‰)(AR98%)NaOH(ACS97%)COD-571-1()85-2APHS-3CpH()1.2COD37000mg/LpH=7.0~8.01.3PACpH(PAC+PAM)PACPAMpHPAC(PAC+PAM)PACPAMpH100mL150mL(250r/min)2min(60r/min)3minpH30minCODCOD22.1PAC2.1.1pHPAC3500mg/L202min3min30minpH5.06.07.08.09.010.011.012.01[]2018-04-19[](1968-)20181245374·57·1CODpHFig.1ChangeofCODremovalratewithsolutionpHpHζ[8]1pH7.0CODpHpH=7.0CODpH=10.0pH=12.0pH7.0CODpHpH=12.0COD98.4%pH7.0AL3+AL(OH)2+pH7.0~8.0pH8.0AL(OH)3Al(OH)4-PACCODPAC2500mg/LpH8.0pH8.02.1.2PACpH8.0202min3min30min5%PAC4mL5mL6mL7mL8mL10mLPAC2000mg/L2500mg/L3000mg/L3500mg/L4000mg/L5000mg/L22CODPACFig.2CODremovalratechangeswithPACdosage2PAC2000mg/LPACCOD31.7%PAC2500mg/LCOD1023mg/L97.3%PACPACPAC5000mg/LPAC3500mg/LCODPACPAC3500mg/LCODPACPAC2000mg/LPAC2500mg/LPACPACCODPACPACCODCOD2.2PACPAM2.2.1pHPAC3000mg/LPAM15mg/L202min3min30minpH6.07.07.58.09.010.033CODpHFig.3ChangeofCODremovalratewithsolutionpH3pH7.0PACPAMCOD43.4%pH=7.0PACPAM30COD824mg/L97.8%pH7.0pHCOD98%pHpH=9.0CODpH=7.5pH=8.0pH7.0PACpH7.0~8.0PACCOD(PAC+PAM)PAM2.2.2PAC4CODPACFig.4ChangeofCODremovalratewithPACdosage201812·58·(PAC+PAM)PAC2250mg/LPAC3000mg/LCOD98%PAC3000mg/LCODPAC2250mg/LCODPAC2250mg/L3500mg/LPACPACPAMCODPACPAM2.2.3PAMpH8.0PAC3000mg/L202min3min30min2‰PAM0.25mL0.75mL1.25mL2mL4mLPAM5mg/L15mg/L25mg/L40mg/L80mg/L55CODPAMFig.5ChangeofCODremovalratewithPAMdosage5PAMCODPAM25mg/LCOD98%PAMPAM25mg/LPAMPAC[9]PACCODPAMPAMCODCOD2.2.4PAC(A)PAM(B)pH(C)333L9(33)91261Tab.1FactorLevelTable(A)PAC/(mg/L)(B)PAM/(mg/L)(C)pH1250057.023000157.533500258.02Tab.2OrthogonalexperimentalresultsCOD/(mg/L)ABC1250057.01072.822500157.5793.032500258.0843.44300057.5776.253000158.0761.063000257.0966.07350058.0710.683500157.0740.993500257.5697.2K12709.12559.62779.7K22503.22294.92266.3K32148.72506.62315.0R560.4264.7513.46Fig.6BeforeandafterorthogonalexperimentsR3PACpHPAMPACpHPAMKKCODA3B2C2PAC3500mg/LPAM15mg/LpH7.5PAC2250mg/LpH7.0CODPACpH3(1)PAC3500mg/LPAM15mg/LpH7.5(2)PAC2250mg/LpH7.0PACpH(3)PAC(PAC+PAM)CODPAM(PAC+PAM)[1][J]201535(08)46-48[2][J]201736(06)79-81(29)20181245374·29· 5EPSFig.5EPScontentinthegranulesatdifferenttemperatureEPSEPSEPS(PS)EPS(PN)EPSPNZeta[20]14~21S-EPSTB-EPSPSPN/PS3(1)SCAR1.8kgCOD·(m3·d)-1HRT=6hVup=4m·h-140~14COD81%SCAR(2)(∅2mm)(∅0.85mm)(0.85~2mm)(3)35(4)EPSS-EPSLB-EPSTB-EPSEPS(PN)S-EPSTB-EPSPN/PS[1]ChongSSenTKKayaalpAetalTheperformanceenhancementsofupflowanaerobicsludgeblanket(UASB)reactorsfordomesticsludgetreatment--astate-of-the-artreview[J]WaterResearch201246(11)3434-3470[2]EGSB20[J]200829(4)44-44[3]SuCLuYQinJetalPerformanceandmicrobialcommunitystructurecharacterizationofaCICanaerobicreactorforthetreatmentofcassavawastewater[J]EcologicalEngineering2017108114-122[4][J]2015(13)23-26[5][J]201635(1)18-25[6]XuFMiaoHFHuangZXetalPerformanceanddynamiccharacteristicsofmicrobialcommunitiesinaninternalcirculationreactorfortreatingbrewerywastewater[J]EnvironmentalTechnology201334(20)2885-2892[7][J]201137(10)4-7[8][J]201711(10)5393-5399[9]SCAR[J]201738(05)2021-2029[10]LagunaAOuattara