Valorisation de la sciure d’une unité de transformation du bois en briquettes de bois densifié

Abstract

All related sawmill products are significant in wood processing units (UTBs). Populations in the tropics generally use fuels for cooking. A study was conducted from febuary 1 to mach 1, 2021 in Pallisco-CIFM companies. This one aimed at the valorization of residues of small particle size : case of briquettes of densified wood. For this it was discussed to estimate the volume of sawdust available on site and not valued (1), subsequently the operational mode used for the production of said briquettes was described according to the context (2). Once the briquettes were produced, it was necessary to determine the characteristics of the briquettes (3) and finally we carried out an economic study of the project (4). Estimating the amount of sawdust available gave us a value of 6404m3 for a volume of 71695m3 of processed wood. Also, for the production of 4 briquettes we used on average 4.6kg of sawdust, 245g of starch and 8.66L of water. The briquettes obtained have a parallelepipedic shape with a density of 360 g / m 3, a moisture content of 10%, a heating value of 27.728 MJ / Kg and an ash content of 0.5%. Grace combustion test, we have been able to deduce that the time of fire is very short compared to firewood and charcoal. Briquettes also burn better and have a high burn time. Finally, thanks to the economic study we could popularize our product in the cities of Yaounde, Douala, and Bafoussam. And thanks to the calculation of the NPV, we could say that this project is profitable.