PRARANCANGAN PABRIK CELLULOSE MURNI DARI BAGASSE � AMPAS TEBU KAPASITAS 400.000 TON / TAHUN

Cellulose fiber is an organic compound which is used in various industrial application including textiles and paper industries. It has already used in production of Asphalt Sealer, Concrete Cast, adhesive, coating, tablet filler and sealant. Conversion of cellulose into biofuels such as cellulosic ethanol is under investigation as an alternative fuel source. Firstly, bagasse as main material is mixed with hot water in pretreatment tank to destroy the bonding between cellulose and pentosan. The next step, pentosan is hydrolyzed to be furfural in Hydrolyser. In this unit, sulfuric acid 1.5% is added, the temperature and pressure are maintained around 150oC and 7 atm. The product of hydrolyser then washed in blow tank 1. The out stream is separated between solid and liquid phase by Rotary Vacuum Filter 1. The separated filtrate which contains sulfuric acid has to be neutralized with calcium hydroxide in neutralizer. The product of neutralization is then separated in rotary vacuum filter 3. The filtrate product which contains furfural and water then separated in distillation tower to get furfural 99%. The product of rotary filter Lignin in the solid product of rotary vacuum filter 1 has to be separated in Digester. In this unit, Lignin is reacted with sodium hydroxide 2.7 M to form sodium lignite which is soluble in water. The digester is set to 160oC and 7 atm. The product stream is then depressurized in to 1 atm and washed in blow tank 2. Solid and filtrate have to be separated in rotary filter 2. The solid product which contains cellulose is then dried in rotary dryer to get cellulose 92%. This plant is designed with the capacity of 400,000 tons per year. The cellulose fiber 92% is produced from 640.000 ton/year bagasse and 1.942.22 tons per year of sodium hydroxide 100%. The utility needs consist of 8.363.100 water tons per year, 1.242.343 tons per year, 72.132,98 fuel oil ton per year and 1 MW of electricity. This plant is going to be manufactured on 250 Ha in Central Lampung, Lampung Province with support of 163 employees. Some economics parameters are evaluated such as: Fixed Capital Investment (FCI) is Rp 909.892.522.265, Working Capital (WC) is Rp 335.487.549.447, profit before taxes is Rp 446.265.195.486, profit after taxes is Rp 223.132.597.743, Return On Investment before taxes is 49%, Return On Investment after taxes = 24,52