J.P. Paredes-Sánchez, is a lecturer in the Department of Energy at the University of Oviedo, Spain. He has been associated with energy projects at the Oviedo Higher Technical School of Mining and Engineering since 2007. He is the author or co-author of papers, books and conferences on energy. He is also involved in EU programs for updating renewable energy research and higher education.
Forest biomass has turned out to be one of the most interesting energy sources in the change to a sustainable energy model, because of its consideration as a renewable resource as well as a reducing agent of the greenhouse effect gas emissions. Forest residue can be an energy source to substitute the use of CO2-emitting fossil fuel. Therefore, the management of the forests can affect the global carbon cycle. Asturias is a region located in the North part of Spain. The natural vegetation is formed by characteristic species of humid areas. Forest biomass is studied like forest residue suppliers and natural key resources for a bioenergy industry. For forest the cleaning is not carried out in a periodic way, mainly because the management of this kind of residue is very complicated as a consequence of the orography and the lack of suitable machinery. Nowadays, in general, biomass residues from cleaning, thinning and forest exploitation (branches, etc.) have no clear application in Asturias. A fraction of the residue due to the nature of the raw material was unavoidable, but improvements in evaluation, operating practices and processing equipment can improve the situation. The results show forest biomass as an alternative energy resource to fossil fuels at regional level.
Analytical chemistry and Environmental Engineering, Waste management and processing, Management of the agricultural grounds (fertilization) and remediation of the polluted sites.
The present research work aims to ensure the higher agricultural productivity in intensive culture. For this prurpose, a research methods for sustainable management of marginal sandy soils (Kalahari type) of agriculture in Kinshasa (Democratic Republic of Congo). Hence, a valorisation of organinic resources locally available in municipal solid wastes as fetilizer (compost) ramains one of the route to make these soils productive for agricultuer.\r\nAn experimental in completely random block was mounted on three sites (Mont Amba, Kimwenza and Balume), two strong agricultural activity. The diagnosis agropedological soil shwed that these soils ares sandy, rubics arenoferralsols dystrics ; have excellent physical conditions (drainage, air circulation and penetration of roots), are provided colloids with variable loads, have an acid reaction, and are low in organic matter and mineral nutrients.\r\nAflter four growing seasons, the reaction of amendments applied at different doses (20, 40 and 60 t/ha) increased not only the physicochemical parameters (pH, TOC, CEE, bases saturation and reduce the aluminium saturation of 90%) but also the microbial parameters (microbial biomass, basal and induce respiration, enzymatic activities of the urease and phophomonoesterase acid). An increase of soyabean, sorrel and peanuts production yield was observed at differents doses of applied compost.\r\nLow doses (≤ 20 t/ha) have proven effective and recommended for annual and regular crop for this soil. Phosphorus was found to be the single most limiting and increased production could be ensiaged on the ground which synergistically, using small doses of compost and mineral fertilizer.\r\n