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1、Chapter8SolidandliquidwastesCollectionanddisposalofconcentratedmalodorous95−98100gasesCollectionanddisposalofdilutemalodorousgases60−8095−100Condensatestripping*90−9595−100*Availabilityincreasedbyliquefyingmethanol.Asinthermaloxidation,thecatalyticoxidationofgaseoussulfurcompoundsresu
2、ltsintheformationofsulfurdioxide,carbondioxide,andwatervapor.Catalyticoxidationissuitablefordealingwithmalodorousgasesfromsulfatepulping.Althoughcatalyticoxidationhasbeenstudiedforthispurpose,thereareasyetnocommercialapplications.Atpresent,catalyticoxidationisusedtodealwithsolventsand
3、othervolatileorganiccompounds.Thebiggestproblemscurrentlyencounteredinodorpreventionatsulfatepulpmillsincludethefollowing:-Noreserveplaceisavailableforburningconcentratedgases,orelsetherearedelaysingettingreservecombustionunitsoperational.-Therearenoactionplanstocaterforescapeofmalodo
4、rousgasesduetoproblemswithcondensatestripping.-Theprocesshardwaredoesnotlenditselftothecollectionofdilutemalodorousgases.-Apartfromtherecoveryboiler,thereisnootherwayofburningalldilutemalodorousgases.Burningcapacityoftheotherboilersandlimekilnaretoosmall.SeealsoTable4.References1.Kwae
5、rnerPulping,Informationbrochures,Tampere,1997.2.Springer,A.M.,IndustrialEnvironmentalControl,PulpandPaperIndustry,TAPPIPRESS,Atlanta,1993,pp.583−591.Chapter8Solidandliquidwastes8.1IntroductionDifferentprocesseswithintheforestindustryresultintheformationofdifferentsolidandsludge-likewa
6、stes.Intermsofvolume,thebiggestarethosefromthetreatmentofeffluentsandfluegases,althoughwoodwasteisalsoproducedinlargequantities.Otherwastesarisingatpulpmillsaregreenliquor,limesludge,andotherprocesswastes.Wastesarisingfrompaperproductionincludethosecontainingfillersandadditives.Chemim
7、echanicalpulpinganddeinkedpulpproductiongiverisetotheirowncharacteristicwastes.Increasingrestrictionsonemissionshaveresultedinanincreaseinthevolumeofwasteproducedbyforestindustryplants.This,togetherwiththedifficultphysicalformofthesewastes,posesproblemsinwastehandlinganddisposal.Thebi
8、oslud
