Performance Evaluation Of Sugar Cane Milling Plant And Optimization Of Process Parameters A Case Of Wonji-shoa Sugar Factory

Performance assessment of WSSF and setting targets for the relatively inefficient mills to improvernthernefficiencyrnandrnproductivityrnisrncrucial.rnThisrnstudy,rnfocusrnonrnperformancernevaluationrnofrnrnmilling plantrnandrnoptimizationrnofrnitsrnprocessrnparameters.rnThernmillingrnplantrn(WSSF)rnperformancesrnrnhavernbeenrnevaluatedrninrntermsrnofrnitsrnBrixrnjuicernextractedrnatrnallrnmillrnsetsrn(5rnsets).rnThernperformancernrnofrneachrnmillrnwasrnmonitoredrnbyrndrawingrnjuicernBrixrncurves.rnFromrnthernBrixrncurve,rnthernsecondrnmillrnrnfrontrnrnroller Brix curve overlays the back roller Brix curve this was not appropriate hence, improvementrnforrndeliveryrnmillrnsettingrnwasrndesired.rnHowever,rnthernreverserncurvernshowedrnacceptablernrnresult.rnThernjuicernandrnbagassernsamplernanalysisrnforrneachrnmillrnsetrnwerernanalyzedrnthenrnmaximumrnlossrnrnareasrnrnwere identified and the process optimization were done. The Brix free water for WSSFrnwere done and found to be averagely 30.63 % on cane fiber. The statistical analysis were donernby design expert software (6.08, version) of central composite design. The study were done byrnvarying the effect of hydraulic pressure and imbibition water flow on the last mill for the responsernvariablesrnofrnpolrnandrnmoisturern%rnofrnfinalrnbagasse.rnThernexperimentalrndesignrncombinationrnrnwerernheldrnbyrninsertingrnthernlowestrnandrnhighestrnvaluesrnofrnhydraulicrnpressurernandrnquantityrnofrnimbibitionrnrnwater flow rate for the last mill. The optimal results of pol and moisture % of bagassernwere between 1.63 - 1.88% and 50.47 - 51.31% respectively, with the respective hydraulic pressurernandrnquantityrnofrnimbibitionrnwaterrnapplicationrnofrn195rn-rn200rnkg/cmrn2rn3rn and 71.3 - 72 mrn/hr. The rnpol and Brix extraction trends were done for how each and individual mills can perform well forrna given milling season. The existing milling plant flow diagram were modified by recycling thernprimary juice Cush-Cush prior to the first mill and secondary juice Cush-Cush to the second mill.rnUsing the optimum values of application of hydraulic pressure and quantity of imbibition waterrnflow rate on the last mill, drawing juice Brix curve, Brix free water on cane fiber and recyclingrnof respective Cush – Cush to recommended point and the optimum output of pol and moisturerncontent of last mill bagasse which can be taken as a positive outcome to bring efficiency improvement,rnproductrnmaximization,rnforrnenergyrnsaving,rncostrnreductionrnandrnincreasedrnprofitabilityrntornrnWSSF inrnparticularrnandrnallrnotherrnsugarrnfactoriesrnasrngeneral.

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