Uji Kinerja Alat Digester dengan Bahan Baku Jerami Padi untuk Pembuatan Pulp Menggunakan Metode Soda (Text Performance Digester with Dried Rice Stalks for Production Pulp Use Soda’s Metode)

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 rice straw. The content of rice straw is composed of cellulose 38.76%, 26.69% hemicellulose and lignin 22.23%. 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 digester tool pulping of rice straw. From straw pulping process stages, namely: (1) dry straw cut, (2) cooking in the digester, (3) pulp is filtered, and (4) pulp was analyzed. Variables that most good result is the optimum state at a temperature of 110oC and cooking time 80 minutes. Results of analysis obtained 41.74% yield.