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1、MODIFICATIONOFSEQUENCEOFUNITOPERATIONSINMECHANIZEDPALMFRUITPROCESSINGB.N.Nwankwojikea,A.O.Odukweb,J.C.AgunwambacaDepartmentofMechanicalEngineering,MichaelOkparaUniversityofAgriculture,Umudike,AbiaState,Nigeria.bDepartmentofMechanicalEngineering,UniversityofNigeria,Nsukka,Nigeria.cDepar
2、tmentofCivilEngineering,UniversityofNigeria,Nsukka,Nigeria.AbstractInducedfreespaceamongnutsinthepresscakeasthepalmoilisexpelleddur-ingpressingwasidenti edasthebasiccauseofexcessivenutbreakage/crushingwhenscrewpressisusedforpalmoilextraction.Thisisthecauseofunpleas-antodour/tasteandcon
3、gealingassociatedwithpalmoilprocessedbymechanicalmethodunliketheoneprocessedusingtraditionaltechnique.Palmnut-pulpsep-arationwasalsorevealedastheonlyunitoperationofthetraditionalpalmfruitprocessingmethodthathasnotbeenmechanized.Thevariousnut- breseparatorsinthepresentdaymechanizedpalmf
4、ruitprocessingofallscaleswasinaddi-tionidenti edasanerrorandshouldn'thavebeeniftheappropriatenut-pulpseparatingstepofthetraditionalpalmfruitsprocessingtechniquewasnotmisin-terpretedatthebeginningbythepioneerEuropeanauthorsofthenativeoilpalmfruitsprocessingtechnology.Thus,palmnut-pulpse
5、paratingmachinesshouldbedesigned,developedandinstalledbetweenthedigesterandpressinalltheexistingandfuturepalmoilproductionmillstoensuremassproductionande ectivere-coveryofhighqualitypalmoilandkernel.Alsorecommendedisthephasingoutofnut- breseparationstepandallmachineries/equipmentassoci
6、atedwithitinallmechanizedpalmfruitprocessing.Keywords:nut-pulpseparation,screwpress,nutbreakage,palmoil, bre1.Introduction(15-30mm)toasmallplum[1,2].Theindi-vidualpalmfruitshowninFigure1isadrupeTheoilpalm(Elaeisguineensis)originatedcomprisingthepulpandnut.fromthetropicalrainforestregio
7、nofAfrica,butduetoitseconomicimportantastheThepulpismadeupoftheexocarpandworldhighestyieldingsourceofedibleandmesocarpwhichcontainsthepalmoilinitstechnicaloils,itisnowgrownasaplanta-celldebris,whilethecentralnutismadeuptioncropinmostcountrieswithhighrainfalloftheshell(endocarp)andedi
