Ferrolox磷酸盐的去除

AdsorptionofPhosphatesFromDrinkingWaterMembraneConcentratesCoolingWaterblowdownWasteWaterTreatmentMunicipalWasteWaterIndustrialWasteWaterAlsothebestadsorbentforAquaticlifeandAquariumsforseaandfreshwatertanks.WATCHFILTRATIONTECHNOLOGYLeadingManufacturerofFiltrationMediaforWaterTreatment®,apatentedgranularFerricHydroxideisthemostefficientandcosteffectivemediainphosphateremovalfromwater.pHlevelandtheconcentrationhasstrongeffectontheadsorptioncapacityofIRONHYDROXIDE.TheuniqueadsorptionpropertiesofFERROLOX®adsorbentcanachievearesidualphosphateconcentrationoflessthan0.05mg/lasPO4(20µg/lasP5+)whichisacceptablebyallregulations.ItisveryimportanttoreuseFERROLOX®inordertoreducecosts.ThisismaybeoneofthebiggestadvantagestouseFERROLOX®mediainsteadofIon-ExchangeorMembranestoremovephosphates.Phosphatesarepresentindrinkingwater,groundwaterandindustrialwater.Sewageandurbanwastewatercontainsupto10-30mg/lofphosphatewhichleadtoeutrophication.TreatedwaterfromFERROLOX®containsalowerconcentrationdownto1-5mg/l.Thepresenceofphosphateionsisaveryseriousproblemsforbio-foulingofreverseosmosis(RO)membranes.Theseionscanreadilyleadtomembraneblockagethroughtheprecipitationofcalciumphosphatesalt.MostoftheAnti-Scalantsbasedonphosphatesandphosphonatesarenotveryeffectiveinpreventingprecipitation.Pooranti-scalantscausepoorresultsinROpurificationofwaterorwastewater.AdvancedphosphorousremovalbyFERROLOX®canbeusedasapre-treatmentstep1.formembranebio-reactors,2.forthepurificationofDrinkingwaterandGroundwaterand3.forthecleaningofindustrialwastewaterwithFERROLOX®.FERROLOX®granularferrichydroxidePHOSPHATEREMOVALINTRODUCTIONSTOPSEUTROPHICATION!2WATCHFILTRATIONTECHNOLOGYLeadingManufacturerofFiltrationMediaforWaterTreatment®WATERhassucceedtomakemostcost-effectivedesigntoremovephosphatescontaminantsfromwateraswellaswastewater.UsingFERROLOX®,theadsorbedphosphatecanberecoveredbackbyregeneration.ApplicationofFERROLOX®makesituniqueandcost-effectivebecauseofitsveryhighadsorptioncapacitywhichremainsalmostunchangedafterseveralregenerationsandrecoverycycles.ThereforeFERROLOX®isthemostsuitableadsorbenttotreatwaterandwastewatercontainingphosphates.FERROLOX®doesnotonlyadsorbphosphatebutalsoallowrecoveryofphosphatesbyregeneration.Inordertotreatwaterorwastewatercontainingphosphatesthreestagesmustbeconsidered:____________________________________________________________________________________________________________1.TheremovalstagewherephosphateisadsorbedongranulesofFERROLOX®.____________________________________________________________________________________________________________2.Recoveryandseparationoftheadsorbedphosphatebyregeneration-toreusethemediaandtoproduceconcentratedphosphate.____________________________________________________________________________________________________________3.ChangingFERROLOX®aftermanycyclesofregenerationanddisposal.____________________________________________________________________________________________________________PHOSPHATEADSORBENTgranularferrichydroxideFERROLOX®HighCapacityisverymuchdependableonAdsorbents'volumeusedinthesystem,thereforeincreasingtheFERROLOX®volumeleadstoadecreaseinresidualphosphateconcentrationandinaweightratioofremovalphosphatetoFERROLOX®adsorbent.SYSTEMDESIGNPhosphateRemovalTypicaldown-flowAdsorptionunits.(PhosphateRemoval)3WATCHFILTRATIONTECHNOLOGYLeadingManufacturerofFiltrationMediaforWaterTreatment®.ForthepHvalueorlevelover9,phosphateremovalwasnotachievedbyFERROLOX®.ItisknownthatatthispHlevel,thesurfaceofthemetal-oxidesinthesolutionarecoveredwithhydroxylgroups.Anionadsorptiontakesplacebypositiveadsorbentsurfacecharges.PhosphateAdsorptionTheacidicnatureofphosphateanionsmakesthesurfacechargemorenegativeontheFERROLOX®media.AnincreaseinpHvalueleadstoadecreaseinadsorptioncapacity.ThehighestadsorptioncapacityisbetweenpH6and7.pHvalueover9stopstheadsorptionprocessandwillreleasealladsorbedphosphateanions.Hencetheregenerationismadewith0.1%NaOHsolutionatpH13.AfterloadingthephosphateonthegranulatedFERROLOX®adsorbent,theycanbewashedoutbysimplysoakingthemediawith0.1%sodiumhydroxidebrinefor1houratahighpHvalue.TheFERROLOX®mediasurfaceisnegativelychargedandthisleadstorepulsionbetweennegativelychargedFERROLOX®mediagranulesandphosphateanions.TheadsorbedphosphateanionsarethenreleasedinthehighpHsolution.ThepHhastobeadjustedbetween12.5-13.5....continuesonpage4PhosphateRemovalPHOSPHATERECOVERYgranularferrichydroxideFERROLOX®MolarweightratioofremovalphosphateonFERROLOX-granulesPhosphaterecoverybyregenerationPhosphateremovalbasedonpHlevel4WATCHFILTRATIONTECHNOLOGYLeadingManufacturerofFiltrationMediaforWaterTreatment®FERROLOX®granularferrichydroxideAdsorptionContacttimeContacttimeforphosphateadsorptiononFERROLOX®adsorbentwithphosphateconcentrationsfrom1mg/lupto80mg/latthepHlevelof5