Uji Kinerja Alat Digester pada Proses Pulping dari Kulit Jagung dengan Proses Soda Menggunakan Natrium Hidroksida (Digester Test Run on Corn’s Skin Pulping Process with Soda Process using Sodium Hydroxide)

Abstract

Digester is a vessel where the cooking process or reaction delignification of wood chips takes place. With the addition of a solution of the chemical cookers, heat, and pressure of the lignin will be dissolved and converted into pulp wood chips. 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, stirrer speed: 2800 rpm and a capacity of 20 liters. Pulping process can use non-wood raw materials, one of which is waste corn husk. The content of corn husk consisting of cellulose 36.81%, 27.01% hemicellulose, lignin 15.70%, ash 6.04%, and the water content of 14.44%. Pulping aims to get as much fiber as possible as indicated by the value of high yield with a minimum lignin content. The purpose of this experiment is to determine the optimum conditions in the pulping digester tool corn husks. Pulping process stages from corn husk that is: (1) skin dry corn is cut, (2) cooking in the digester, (3) pulp is filtered, and (4) pulp was analyzed. The variables that best results are there on trial 4 wherein the temperature used is 115 0C and ripening time of 40 minutes. The results of the experiment 4 obtained a yield of 310 g and the moisture content is not too high at 8.2%. Keywords: Digester, Corn’s Skin, Pulp