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www.asa-inc.org.au04connectionsAUGSEP10SLAGINSIDERSteelFurnaceSlagSFSfnesutilisedorremovingphosphorusromtertiarytreatedeuentatNewcastleInearlyJuneASMSx19DrVijayJoshivisitedanewlybuiltlightindustrialsiteatHexhamnearNewcastlewheresteelfurnaceslag0neswereusedtoremovephosphorusfromtertiarytreatedef1uent.ThephosphorusabsorbingcapacityofSFS0neswasestablishedthroughexternallaboratorytestingwhichconcludedthatPhosphorusSorptionIndexandPhosphorusRetentionIndexwhereclassedasveryhigh.ThismeansthatSFSisabletoremoveahighpercentageofphosphorusfromwastewaterandalsoretainphosphorusforalongperiodoftime.Ourmaterialwasblended12withalocalsandandplacedundergrass.Sprinklersdeliverthetreatedef1uenttothegrassandphosphorusisremovedasit0ltersthroughthebedofSFSsandbeforeenteringanearbywaterway.Phosphorusincreasesthegrowthofdamagingalgaeincreeksandriverswhichreducepopulationsofnativeplantsand0sh.UseofSFS0nesinthisprojectallowedourcustomertodevelopthesitewithouttheneedforanEPAdischargelicencewhichhadpreviouslybeenthecase.ContactforfurtherinformationDrVijayJoshiASMS