HALAMAN JUDUL LIFE CYCLE ASSESSMENT UNTUK PT HOLCIM INDONESIA Tbk. PABRIK CILACAP: KOMPARASI ANTARA BAHAN BAKAR BATUBARA DENGAN BIOMASSA

PT Holcim Indonesia Tbk. Cilacap Plant is the first cement plant in Central Java, which produces general use cement (PPC/Portland Pozzolan Cement) with the capacity of 2.6 million tons/year. Since 2007, the company has been using biomass as an alternative fuel, one of which is rice husk. Replacement of coal with other fuels, especially biomass, will produce different emissions and impacts to the environment. The aim of the study is to evaluate the effect of utilizing coal and biomass as fuels to the environment using Life Cycle Assessment (LCA) method. Cradle to gate approach was used to evaluate four scenarios of different fuel combinations: (1) 100% coal, (2) mixed fuel of 90% coal and 10% biomass, (3) mixed fuel of 50% coal and 50% biomass, (4) 100% biomass as primary fuels in the kiln for 1000 kg cement. Evaluation of environment impact related to each scenario was using ISO 14040 (2006) that consists of: (1) goal definition and scoping, (2) inventory analysis, (3) impact assessment, and (4) interpretation. From the results of contribution analysis, scenario 1, 2, 3, and 4, respectively, give 2,78 x10-1 Pt, 2,24 x10-1Pt, 1,57 x10-1Pt, and 8,50 x10-1 Pt. From four scenarios, global warming, respiratory inorganic and resources give significant impacts to the environment. Based on the results of improvement analysis, it is sugggested to replace silica tranportation using train, to utilize miscanthus giganteus and to grow plants or reforestry