MOBILE BIODIGESTOR FOR THE PRODUCTION OF BIOGAS USING SHEEP MANURE

Abstract

The objective of this study was to conceptually design a field biodigestor that is characterized by being mobile, integrating other renewable energies in its operation and functioning, and a high capacity for dry matter, with the aim of having an alternative source of energy for the Mexican highlands and to care for the environment. The research was done in Salinas, San Luis Potosí, México; sheep manure was chosen as organic residue, and the optimization of transport and location of storehouses was performed based on the availability in the municipality. Manure filtration assays were done and the dry weight was obtained in the laboratory. The mobile thermophilic biodigestor presented the possibility of improving the biogas production process with the following effects: reduction of the water necessary in more than 50 % due to the high dry matter. Because of the mobility, energy is saved for transport of the material supply and biofertilizer distribution. Solar heating of the substrate allows reducing the processing time around 50 %. The process of mixing the hydraulic, mechanic, pneumatic substrate is not necessary because only the liquid moves. In addition, soil compacting is reduced because of the weight reduction of the biofertilizer. It is possible to use the biodigestor in a mobile, transportable or stationary way. Assays are necessary in the production with different technological uses to receive experiences of feasibility