Abstract
The search for energy sources that can replace fossil fuels is extremely important, both in the econo-mic and socio-environmental aspects. The objective of this work was to make briquettes with coffee grounds, rice husk, orange peel and to characterize the moisture content, ash content and lower and higher calorific value comparing with the values for firewood and compression test, to characterize the resistance briquette mechanics, study and present the technical and economic feasibility analysis. In this way, the materials presented adequate mechanical resistance to compression to be manipulated and stored, characterized for domestic use. The composition that obtained the best result of energy content was Sample 2 (10g of rice husk, 75g of potato peel and 50g of orange peel) which presented the value of superior and inferior calorific value of 17.22 MJ/Kg and 15.85 MJ/kg, respectively. The smoke released during burning was in the range of 2-3 on the Ringelmann scale. In addition, the values found for all solid biofuels were higher than those known for firewood.
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