The project has a double objective: First, it aims to solve the environmental and economic problems caused by the disposal of livestock by-products and waste and some municipal non-recyclable by-products and waste.
Second, and in parallel, to obtain clean energy that can be used by industry, businesses or households in the area. This is achieved by transforming this waste into biogas and biomass, producing in the process more energy than it consumes.
There are a number of specific objectives that can help to better understand the project Metabioresor:
A/ To find the optimal combination of different by-products and wastes used in the pilot plant to produce the maximum potential amount of energy. This requires assessing the production of biogas and methane content of the different combinations of co-substrates: sewage sludge, animal carcasses, livestock waste and by-products (manure, carcass hydrolysate, slaughterhouse waste…).
B/ To study the physicochemical properties of the digestates generated by methanation, by analysing more than 20 different properties to optimize their possible applications, or further dehydrate them then produce RDF (Refuse-Derived Fuel) for combustion in an suitable biomass boiler.
C/ To optimize the mixing process with pruning and garden debris, waste wood from MSW, forestry and other sources, as well as the subsequent pelletizing, and to develop an optimal RDF in terms of heat energy production with minimal air-quality impact.
D/ To determine the best use for the final residues: ashes which represent 2-3% of the initial volume of waste.
E/ To develop economic studies to assess costs and benefits of the energy recovery from by-products and waste, at different scales and in different areas of Europe.
Through its actions, the project Metabioresor demonstrates the feasibility of this process and provide the technical and economic adjustments to its different phases allowing for the construction of full-scale plants.
These plants, for example, could be used by local or regional governments, cooperatives and large pig farms, as well as other farmers, for the management of waste and by-products. Return on investment would be ensured by the energy produced and the environmental problem would be resolved.