STUDY OF CELLULOSE CHARACTERISTICS AS A BINDING AGENT IN BRIQUETTING OF TORREFIED MUNICIPAL SOLID WASTE

• Main Author: Anwar, Ilham
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/50374
• Institution: Institut Teknologi Bandung

Municipal solid waste can be processed into solid fuel through torrefaction process. Torrefaction product has a low bulk density and is difficult to transport, so a briquetting process was required. In this study, briquetting process with a binding agent from the municipal solid waste component was used. Cellulose is one of the constituent components of organic municipal solid waste which is not completely decomposed in range torrefaction temperature of 200 to 300 °C. Therefore, there is an opportunity to used cellulose as a binding agent in briquetting process of torrefied municipal solid waste. Research on the effect of cellulose on the briquettes mechanical strength studied using dried samples of sugarcane bagasse (cellulose content 41 – 55%). Briquetting process was performed by varying briquetting pressure and temperature. Biquettes evaluated in terms of mechanical strength of briquette by drop shatter test. Mechanical strength of the briquettes was mapped based on range briquette Drop Shatter Index (DSI) value. Zoning was carried out on the briquette mechanical strength map, which each zone is separated by an IsoDSI line. In this study, there were two results. The first result was characteristics of cellulose in briquetting process caused briquette sample to soften and not directly act as a binding agent. At a briquetting temperature of 220 °C and pressure of 200 – 500 bar, soften of cellulose encourages interlocking binding mechanism of particles. When temperature drops sample will harden and interlocking mechanism occurs in briquette so the DSI value increases from 39.80% to 88.96%. The second result was briquetting graph of torrefied municipal solid waste which was an adjustment from briquetting graph of bagasse. The adjustment was changing the slope of the 80% IsoDSI line from -0.48 to -0.65 and shifting 1050 bars to the higher value. These changes were made using secondary data from literature studies.