芬顿试剂氧化对污泥脱水性能的影响洪晨

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27620146ResearchofEnvironmentalSciencesVol.27No.6Jun.2014.J.2014276615-622.HONGChenXINGYiSIYanxiaoetal.InfluenceofFenton'sreagentoxidationonsludgedewaterabilityJ.ResearchofEnvironmentalSciences2014276615-622.2013-10-312014-01-04511040092012D009006000003FRF-TP-12-011B1984-hongchen000@126.com.*1976-xingyi@ustb.edu.cn*100083WCCSTρEPSEPS.EPSTB-EPSLB-EPSS-EPSWCCST.pH4wH2O2wFe2+40mggρEPS33.04%WCCST63.36%28.7s.PearsonρTB-EPSWCCSTP<0.01ρLB-EPSρS-EPS.EPSρρ52.72、15.99mgL446.05、522.36mgL.X7051001-6929201406-0615-08ADOI10.13198j.issn.1001-6929.2014.06.08InfluenceofFenton'sReagentOxidationonSludgeDewaterabilityHONGChenXINGYiSIYan-xiaoWANGZhi-qiangLIUMinSchoolofCivilandEnvironmentalEngineeringUniversityofScienceandTechnologyBeijingBeijing100083ChinaAbstractThepotentialbenefitsofFenton'sreagentoxidationonsludgedewaterabilitywereinvestigatedinthisstudy.ThewatercontentofthesludgecakeandcapillarysoptimeCSTwereusedtoevaluatethesludgedewaterability.LayersoftheextracellularpolymericsubstanceEPScontentandthesmallorganicacidcontentinthesludgesupernatantweredeterminedtoillustratetheobservedchangesintheFentonconditioningprocess.TheresultsindicatedthatFentonconditioningcouldfacilitatetheEPSoxidativedecompositionandthetightlyboundEPSTB-EPSwerecrackedintothelooselyboundEPSLB-EPSandtheslimeEPSS-EPS.ThereforeFentonconditioningcouldsignificantlyreducethewatercontentofthesludgecakeandCST.TheidealconditionswouldincludeaH2O2dosageof40mggandaFe2+dosageof40mggatpH=4.ThetotalEPScontentswerereducedby33.04%whilethewatercontentofthesludgecakeandCSTdecreasedto63.36%and28.7srespectively.PearsoncorrelationanalysisresultsindicatedthatTB-EPShadsignificantcorrelationwiththewatercontentofthesludgecakeandCSTP<0.01whichwastheimportantfactoraffectingthesludgedewateringperformance.TheresultsalsodemonstratedthatS-EPSandLB-EPShadaweakcorrelationwiththesludgedewateringperformance.HighperformanceliquidchromatographyHPLCanalysisshowedthatwiththeincreasingFenton'sreagentdosagetheEPSoxidativedecompositiondegreeandthespeciesandamountofsmallorganicmatterinthesludgesupernatantincreasedsignificantly.Theformicacidandaceticacidcontentsincreasedfrom52.72and15.99mgLoriginalsludgeto446.05and522.36mgLrespectivelyH2O2dosageof40mggandFe2+dosageof40mggatpH=4.KeywordssludgeFenton'sreagentoxidationdewaterabilityextracellularpolymericsubstance1-4.5-8..279-13.LIU13-14H2O2Fe2+H2O2Fe3+H2O2Fe2+.15wH2O2wFe2+CSTSRF.12.EPSextracellularpolymericsubstances16.EPS50%~90%17-18.EPS80%.EPS、、、DNAEPS70%~80%19.20-21SCOD、EPS.EPSEPSEPSS-EPS、LB-EPSTB-EPS22-233.ρS-EPS、EPS.EPS3、.S-EPS、LB-EPS、TB-EPSEPS.11.195%4℃.172h.30%H2O2、、、、、、、、、、、、、.1Table1PropertiesofthesludgeusedinthisstudyρmgL48952.55±244.78ρmgL32843.63±1644.26pH7.19±0.12%95.07±0.15CSTs180.22±5.61S-EPSρS-mgL360.32±15.75ρS-mgL74.53±6.64LB-EPSρLB-mgL152.14±7.75ρLB-mgL33.65±4.87TB-EPSρTB-mgL3020.56±130.46ρTB-mgL593.78±30.56ρmgL52.72±6.78ρmgL15.98±2.67ρmgL—1.2〔AB104-N-〕MY-3000-6DGF25003CSHB-ⅢpH〔FE20-〕304MTritonElectronicsTG16-WSKQ-800DBLC-20ADC18HPLCColumnΦ4.6mm×250mm5μm.1.31.3.1100mL150mL4molLH2SO4pHH2O2FeSO4·7H2O150rmin120min4molLNaOH.50mL150mm-0.055MPa30s.pHpH1~6wH2O240mggwFe2+20mggWCCST.pH4wH2O210~100mggwFe2+10~80mggwH2O2、wFe2+WCCST6166.H2O2ρEPSpH4wH2O210~100mggwFe2+40mggEPSρρ.Fe2+ρEPSpH4wH2O240mgwFe2+10~80mggEPSρρ.1.3.2WCWC=W1-W2W1×100%1WC%W1gW2105℃g.CSTCST.24EPS30mL3000rmin15minS-EPS30mL7400rmin15min0.45μmLB-EPS30mL20kHz480W10min15000rmin20min0.45μmTB-EPS.ρEPSFolin-Lowry25ρ26ρ.27-28、.1000mLKH2PO4pH=40.20molL70mLCH3OH0.45μm10min0.5mLmin40±1℃215nm20μL.22.12.1.1pHpH1.1pHWCCST.Fe2+H2O2·OH·OH1114.pH·OHFe2+29.pHFe2+FeOH3pHH+FeOOH2+Fe2+·OH.pH4WCCST64.75%34.9s.921pH.1pHFig.1EffectofpHonsludgedewaterability2.1.2H2O2Fe2+wH2O2、wFe2+2、3..2a、3aWCCSTwH2O2.wH2O240mggWC78.87%66%CST180.1s50.0swH2O2≥60mggWCCST.H2O2·OHwH2O2·OH.wH2O2.wH2O240mgg.wFe2+WCCST.2b、3bwH2O240mggwFe2+10~80mggWCCSTwFe2+wFe2+40mgg.pH4wH2O240mgg71627wFe2+40mggWCCST63.36%28.7s15.51%84.06%.wFe2+mgg1—102—203—404—605—80.2WCFig.2WatercontentofsludgecakewithFenton'sreagentconditioningwFe2+mgg1—102—203—404—605—80.3CSTFig.3CSTchangesofsludgewithFenton'sreagentconditioning2.2EPSEPSρEPS70%~80%30EPSρ、ρ.2.2.1wH2O2ρEPS4ρEPS4229.97mggTB-EPSρTB-ρTB-3028.17593.59mgLρρ85.67%85.36%LB-EPSρLB-ρLB-143.1629.06mgLρρ4.05%4.18%S-EPSρS-ρS-363.3172.68mgLρρ10.28%10.45%.EPSTB-EPSLB-EPSS-EPS.EPSρρ.wH2O210mggρρ.ρS-EPS、ρLB-EPSρS-ρS-687.25%384.64%ρLB-ρLB-828.91%436.10%ρTB-EPSρTB-ρTB-3028.17593.59mgL916.54309.44mgL69.73%47.87%.wH2O2≥20mggEPSρρwH2O28166ρS-EPS、ρLB-EPSρTB-EPS.wH2O240mggρEPS2832.51mgL33.04%wH2O2ρEPS.wH2O20~10mggρEPSρTB-EPSρLB-EPSρS-EPS.TB-EPSL-EPSS-EPS.3ρρ.wH2O220~40mgg·OHEPSρEPS.wH2O2≥60mggH2O2Fe2+Fe3+Fe3+H2O2·OH31ρEPS.wFe2+40mggpH4wH2O20.ρEPSρρ.4wH2O2ρEPSFig.4EffectofH2O2dosageonEPScontent2.2.2wFe2+ρEPS5wFe2+ρEPSwFe2+ρ、ρ.wFe2+10~40mggρEPSρρ44.21%27.99%.wFe2+ρTB-EPSρLB-EPSρS-EPS.wFe2+60~80mggwFe2+ρEPSρTB-EPSρL-EPSρS-EPS.wFe2+Fe2+EPSwFe2+.Fe2+·OHwFe2+·OH2032wFe2+·OH·OHwH2O240mggpH4wFe2+0.ρEPSρρ.5wFe2+ρEPSFig.5EffectofFe2+dosageonE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