化学絮凝作用对高盐废水Fento省略处理过程中产生污泥特性的影响研究孙祥

20131240254·135·Fenton(211400)[]Fenton()(PAM)PAMpHpH10PAMPAMPAM[]Fenton[]X[]A[]1007-1865(2013)12-0135-02FlocculationandDewateringPropertiesofSludgeProducedfromHypersalineWastewaterTreatmentSunXiang,HuangDeqing(JiangsuYangnongKumhoChemicalCo.,Ltd.,Yangzhou211400,China)Abstract:Fe(OH)3sludgeproducedfromFentontreatmentofhypersalinewastewaterishighlytinyandverydifficulttoberemovedbyplate-framefilterpress(PFFP).TheeffectsofPAMadditiononsludgeflocculationanddewateringpropertieswereinvestigatedinthisstudy.ThesludgeparticlesizeincreasedsignificantlyafterPAMflocculation,butthiseffectwasstronglydependentonsolutionpH,andthePAMloseitsfunctionasthepHofsolutionwasincreasedtoabove10.Inaddition,SRFalsoreducedafterPAMflocculation,andthefiltrationratewasstronglyenhanced.Thus,itisfeasibletousePAMflocculationaspretreatmentofPFFP.Keywords:hypersalinewastewaterFentonsludgeflocculationdewateringFenton1-4[1-2]Fe2++H2O2→Fe3++·OH+OH-(1)·OH+Fe2+→Fe3++OH-(2)Fe3++H2O2↔Fe-OOH2++H+(3)Fe-OOH2+→HO2·+Fe2+(4)Fenton[3]Fenton[4]Fenton11.1Fenton[5]Fenton11Tab.1MainpropertyofwastewaterTOC/(mg·L-1)pH/μm/%/%VSS/TSS968.54.514.70.360.9961.2(PAM)11000.1%400mL200r/min30s50r/min10min30minpHPAMFenton1.3(SRF)[6]bPAr22P-A-μ-ω-bt/V=bV+at-V-100mLP=0.6MPa10s1.4(TOC)(Mastersizer2000)22.1PAMTOCFenton4.5μmPAMpHPAMpH6~960~100μmpH9PAMpH6~8.510~15mg/LPAM1PAM5minPAMPAMTOC35mg/L10mg/LPAM4.5μm37.0μm63.0μmPAMPAMTOCPAM[]2013-05-08[](1985~)201312·136·(PAM10mg/L)Fig.1EffectofpHonsludgeflocsizebyPAM2PAM5min(pH8PAM10mg/L)Fig.2PhotoofFentonsludgewithout/withtheadditionofPAMafter5min(pHofsludgewas8,PAMdosageof10mg/L)051015202530020406080TOCPAM/(mg.L-1)m100110120130140150TOC/(mg.L-1)3PAMFentonTOCFig.3EffectofPAMdosageonsludgeparticlesizeandTOCinsupernatantbyPAM2.2PAMPAM4SRF6.2E+11m/kg[7]5~10mg/LPAM2E+11m/kgPAMPAMPAMPAM10mg/L05101520250.00E+0001.00E+0112.00E+0113.00E+0114.00E+0115.00E+0116.00E+0117.00E+011SRF/(m.kg-1)PAM/(mg.L-1)4PAM(pH8)Fig.4InfluenceofPAMdosageonSRFofFentonsludge(pHofsludgewas8)3FentonPAMPAMpHpH10PAMTOCPAMPAM[1]WardmanPCandeiasLPFentonchemistry:anintroduction[J]Radiationresearch1996145523-531[2]PignatelloJJOliverosEMacKayAAdvancedoxidationprocessesfororganiccontaminantdestructionbasedontheFentonreactionandrelatedchemistry[J]Criticalreviewsinenvironmentalscienceandtechnology2006361-84[3]NeyensEBaeyensJAreviewofclassicFenton’speroxidationasanadvancedoxidationtechnique[J]JournalofHazardousmaterials20039833-50[4]ZhangHChoiHJHuangCPOptimizationofFentonprocessforthetreatmentoflandfillleachate[J]JournalofHazardousmaterials2005125166-174[5]WeijunZhangXYWangDSCompleteRemovalofOrganicContaminantsfromHypersalineWastewaterbytheIntegratedProcessofPowderedActivatedCarbonAdsorptionandThermalFentonOxidation[J]Industrial&EngineeringChemistryResearch2013525765-5771[6]PengGYeFLiYComparativeinvestigationofparametersfordeterminingthedewaterabilityofactivatedsludge[J]Waterenvironmentresearch201183667-671[7]BarkerDJStuckeyDCAreviewofsolublemicrobialproducts(SMP)inwastewatertreatmentsystems[J]WaterResearch1999333063-3082