The Effect of Particle Size, Pressure, Holding Time and Drying Temperature to the Physical and Mechanical Properties of Briquettes

Abstract

The problem of jatropha waste that has not been managed optimally has an impact on environmental pollution. Therefore, it is necessary to conduct research to utilize and utilize jatropha waste in products that are beneficial to the community. The purpose of this study was to find the best variation of particle size, time pressure, removal, and drying temperature to produce the best briquettes. The independent variables in this study were particle size (60 mesh, 80 mesh and 100 mesh); pressure (100 kg/cm2, 200 kg/cm2 and 300 kg/cm2); removal time (3 minutes, 6 minutes, 9 minutes) and drying temperature (100 C, 105 C and 110 C). The variables considered in this study were the water content and the compressive strength of the briquettes. The criteria to get the best product using R2 and R Adj. The results showed that the water content of the briquettes was 7.12%, and the best compressive strength was 23,768 kg/cm2. The water content model was declared feasible and valid to predict the water content of quality briquettes as indicated by all independent variables having VIF<10 and TOL> 0.1 and Durbin Watson value: 2.165 in the range of 1.767<D<2.233. Particle size, pressure, removal time, and drying temperature have a percentage contribution to the briquette pressure is 30.769%, respectively; pressure 29.338%; time eliminated 22.315%; drying temperature 7.952% and the remaining factors that are not used in this study and errors. The compressive strength model is declared feasible and valid to predict the compressive strength of quality briquettes as indicated by all independent variables having VIF < 10 and TOL > 0.1 and Durbin Watson value: 2.286 in the range of 2.233 < D < 2.687.