Perancangan Alat Digester untuk Pemanfaatan Limbah Eceng Gondok Sebagai Bahan Baku Pulp dan Kertas dengan Proses Orgonosolv (Design of Digester Equipment to Utlize Eichhornia Crassipes Waste As Pulp and Paper Material Using Orgonosolv Prosess)

Abstract

In designing this tool have dimensions digester include: tank diameter : 35 cm , height tank : 50 cm , plate thickness : 0.12 cm , Impeller diameter : 23.07 centimeters and stirrer speed : 2800 rpm to obtain a total volume of digester is 48 , 08 125 liters , if the volume of solution used was 80 % , the volume was 38.465 liters . In lab testing of the design tool digester using raw materials hyacinth with process orgonosolv using variable cooking time is 30 minutes , 45 minutes , 1 hour and 1 hour 30 minutes , and the temperature is: 700C , 800C , 900C and 1000C as well as the concentration of ethanol at 5 % , 10 % , 15 % and 20 % . The test results include moisture content , ash content , cellulose α levels and analysis results yield pulp. At first variable using 700C temperature with long cooking time 30 minutes and the addition of 5 % ethanol concentration obtained at 51% moisture content , ash content of 22% , cellulose α levels of 73.7 % and a yield of 12.7 % . The second variable using a temperature of 800C with a long cooking time 45 minutes and the addition of 10 % ethanol concentration obtained at 49 % moisture content , ash content of 30.5 % , α cellulose content of 72% and a yield of 13.86 % . on a third variable using a temperature of 900C with a long cooking time 1 hour and the addition of 15 % ethanol concentration obtained at 48 % moisture content , ash content of 36% , cellulose α levels of 69.7 % and a yield of 14.86 % . the fourth variable using a temperature of 1000C with long cooking time 1 hour 30 minutes and the addition of 20 % ethanol concentration obtained 47.5 % moisture content , ash content of 26% , α cellulose content of 68% and a yield of 13.46 % . Factors - factors that affect the pulping process is temperature , cooking time and the concentration of ethanol used . Abdul.kharis46@