Resumen

PINTO, Telma et al. Forest Biomass: Estimation of Processing Time and Costs. Silva Lus. [online]. 2013, vol.21, n.Especial, pp.163-176. ISSN 0870-6352.

Forest biomass is the sum of the biomass understory aboveground vegetation and biodegradable waste. Collecting these residues reduces the risk of wild fires and the cost of cleaning the forest stands. Also, these residues can be used in the production of energy and consequently open a window of economic profit. Studies about the working time necessary for each forest operation are important to estimate the associated costs and to study the viability of economic and energetic balance. In order to estimate the time spent on the complete cycle of the forest biomass exploration, each operation was evaluated from the beginning to the final industry end users. The knowledge of these working times is essential to estimate the cost of each operation and to determinate economic and energetic balances (using the consumables value). The productivity and the balances of each operation were calculated taken into account the costs and working time associated. The result of the economic and energetic balances was positive for each study area near Mortágua, Águeda and Mangualde.

Palabras clave : productivity; methods; balance; energy.

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