《Electrochemical Technologies in電化學(xué)技術(shù)》由會員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。

1、ElectrochemicalTechnologiesinWastewaterTreatmentGuohuaCHENDepartmentofChemicalandBiomolecularEngineeringTheHongKongUniversityofScienceandTechnologyEcoAsiaConference(29/10/2008)WaterPollutionImpactsWastewaterTreatmentTechniquesCoagulationSedimentation?toremoveparticles

2、FlotationFiltrationBiologicalprocessesAdvancedoxidationtoremoveorganic?AdsorptioncompoundsMembraneprocessesElectricityIsNotaStrangerElectrochemicalmethodsElectrodepositionElectrocoagulationHighefficiencyElectroflotation?EasyoperationElectrooxidationCompactfacilitiesEl

3、ectrodisinfectionElectroreductionElectrodepositionforheavymetalrecoveryMn++neM-+neMn+MElectrocoagulation?GeneratingcoagulantelectricallyAl–3e?Al3+Fe–2e?Fe2+?Sludgefloatedbyhydrogengas2HO+2e?H+2OH-22ApplicationsofElectrocoagulation?Suspendedsolids?Oil&greaseFacilitiesR

4、equired?AlorFeplatesaselectrodes?DCpowersupply?PumpingfacilityElectrocoagulationunits+-+-(a)Horizontalflow(b)VerticalflowThealuminumdemandandpowerconsumptionforremovingpollutantsfromwaterPollutantUnitquantityPreliminarypurificationPurificationAl3+,mgE,W?h/m3Al3+,mgE,W

5、?h/m3Turbidity1mg0.04–0.065-100.15–0.220-40Colour1unit0.04–0.110-400.1–0.240–80Silicates1mg/SiO0.2–0.320-601-2100-2002Irons1mgFe0.3–0.430-801–1.5100–200Oxygen1mgO0.5-140-2002-580-8002Algae10000.006–0.0255-100.02–0.0310–20Bacteria10000.01–0.045-200.15–0.240-80Electrofl

6、otation?Generatinggasbubbleselectrically2HO-4e?O+4H+222HO+2e?H+2OH-22?Gasbubblesattachingtoflocs?FloatingtotopofwatersurfaceEconomicparametersintreatingoilyeffluentsTreatmenttypeEFDAFIFSettlingBubblesize,?m1-3050-1000.5–2Specificelectricityconsumption,30-5050-60100-15

7、050–100W/m3Airconsumption,m3/m3water0.02–0.061ChemicalconditioningICOC+FOCIC+FTreatmenttime,minutes10-2030-4030-40100-120Sludgevolumeas%oftreatedwater0.05–0.10.3–0.43-57-10Oilremovalefficiency,%99–99.585-9560-8050–70SSremovalefficiency,%99–99.590-9585-9090-95Challenge

8、sinOEvolutionAnodes2EconomicalStableActiveOEvolutionAnodes2Pt(wire,mesh,plates)PbO2GraphiteDSA(TiO-RuO;IrOwithTaO,ZrOorCeO)2