3+-+58+Research+on+High+Energy+Electron+Beam++Irradiation+Treatment+of+Sewage+Sludge

152IMP&HIRFLAnnualReport20123__58ResearchonHighEnergyElectronBeamIrradiationTreatmentofSewageSludgeIiXin，SunYongliang，WangJie，LiuRuiyuan，WangJufangandLiWenjianlhesewagesludgewasfromsewagetreatmentprocessandcomposedmainlybysoilparticles。solidresidues’tlocculentmaterialsandotherelementscontainingmicroorganismsandorganicmattersandinor—ganlcmatters．1hetotalcontentoflndustrialandmunicipalwastewater，goingwiththesocialdevelop—ment，increasedyearbyyear．Therefore，thequantityofsewagesludgedischargedincreaseddramatically．Becauseoicontalmngalargenumberofthepathogen(parasites，bacteriaandviruses)。organicmaterialsandnutrientelement(N，P，Kandsoon)，untreatedsewagesludgecoulddisrupttheecologica1environ—mentanddamagehumanhealth，ifitwasdischargedintotheenvironmentdirectly．Moreover，thebenefi—cialelementsofsewagesludgewerealsowastedu,2j．Atpresent，thehelmintheggsandmicrobialsporescouldnotbekilledthoroughlyandsomepersistenceorganiccontaminantscouldnotbedegradedeffectivelybytraditionaItreatmentssuchasanaerobicdigestion，compostand1andfill]．Consequently，aclean，effi—clent，simpleandnosecond—pollutedsludgetreatmenttechnologywasneedurgentlyandpromising．、管500400300200JO0Dose(Gy)2027Dose(Gy)Fig．1TheSCOD，TN，TPandsolidcontentofhighenergyelectronbeamirradiationsludge．1hetreatmentotsewagesludgebyhigh—powerelectronbeamirradiationasanewpromisingtreatmenttechnologywasstudiedinordertoimprovesludgeInnocenttreatmentwithoutconsideringradiationpollu—tlonandradioactivesourcemanagement．ThemoisturecontentofsludgewhichcamefromLanzhoucitySewagetreatmentplantwasabout80andtheirradiationdoseoftheelectronbeamwas5，10，l5and10kGy．1hreekindsotthickness(0．3，0．5and1．0cm)sludgewereirradiatedtoresearchthegermicidalef—hcacyandthechangeotphysicalandchemicalproperties．Accordingtoexperimentalresults．itwasshowedthatthethicknessofsludgewasanimportantfactortoirradiationeffectandthegermicida1efficacyoIhlgh—powerelectronbeamirradiationwasapproximately1O0viaagarplateculturemethod．Theex—perimentaldataindicatedthattheSCOD(SolubleChemicalOxy