Production of Briquettes to Utilize Woody Cutting Waste at Universitas Internasional Semen Indonesia (UISI)

Abstract

Abstract Universitas Internasional Semen Indonesia (UISI) disposes abundant amount of woody waste, such as leaves, twigs, and brunches from the pruning of woody plants. The aim of this research is to convert of this waste into combustible biomass briquettes by varying the particle size and binder ratio. A hydraulic press with 2 tons power and a cylindrical iron mold with diameter of 3.5 cm and height of 3 cm were used for the briquetting process. The physical characteristics of woody waste briquette, such as moisture content, ash content, volatile matter and carbon fix were evaluated using proximate analysis. The caloric value of briquetted fuel was measured by bomb calorimeter. The combustion test was conducted to determine the combustion characteristic of briquettes. The general result shows that the caloric value of developed briquettes was between 3402 and 3630 kcal/kg. The moisture content of briquette ranged from 1.080-1.16 %. Volatile matter was found in the range of 22.2 to 39.4 %. Ash content was 31.2-35.9 %, and carbon fix was 23.54-45.52%. The shortest ignition time was 229 s. The longest burning time was 78 minutes. Based on TG/DTA results, woody waste briquette decomposition occurred from 49°C to 801°C.