<![CDATA[Energy is classified into two groups: the first is non-renewable energy, such as coal, petroleum, and natural gas. While the second is renewable energy, for example, solar, geothermal, water, wind, and biomass. Biomass is organic material derived from plants or animals that includes wood waste such as sawdust, bark, forest residues and agricultural waste such as rice husks, straw, animal manure and others. Briquettes are categorised as solid fuels from alternative energy sources to replace fuel oil through a carbonisation process and forged through pressure with or without adhesives. This study aims to determine how the effect of composition variations on the characteristics of biobriquettes made from biomass through the carbonisation method affects calorific value, volatile matter, ash content, and water content. The experimental method is the method used in this study, with stages of material preparation, material combustion, briquette making, and briquette testing with variations of coffee grounds and rice husks, 25:75, 50:50, and 75:25. The tests carried out were proximate tests, including calorific value, water content, ash content, and volatile matter. Based on the results of research and testing of coffee grounds and rice husk briquettes, the calorific value of sample A was 2,692.66 cal/g, sample B was 3,402.81 cal/g, and sample C was 4,089.19 cal/g. The volatile matter content in sample A was 50.2921%, sample B was 64.9598%, and sample C was 83.1159%. The ash content of sample A was 43.4975%. Sample B was 29.0613%, and sample C was 14.711%. The water content in sample A was 4.3336%, sample B was 5.2663%, and sample C was 1.3438%.]]>
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