Biodigestor: uma tecnologia sustentável.

Abstract

The present work had as objective to quantify, to qualify biofertilizer and biogas production, a biodigester prototype was made in a polyethylene drum using materials low cost, easy handling, fed with 1:1 water diluted bovine manure adding sugar and yeast to optimize. The production of microorganisms, the experiment was carried out in 45 days by means of anaerobic digestion, monitoring the temperature daily in the morning, afternoon and evening. It was obtained 60.37 kg of biofertilizer with characteristic humus odor (fermentative process), aqueous solution and the composition of macronutrients, OM, C and analyzed pH can be used for agricultural purposes, since it presented good concentrations of macronutrients and OM the biogas presented. Leaks during the experiment being justified by manufacturing failures, temperature fluctuations and feed received by the animal, the biogas production was evaluated by estimating the methane gas generation using the calculated mass of the biogas 50g and the density under normal conditions of temperature and pressure (NCTP) of 0.657 kg/m3 and considering that 70% of the gas was found to be 0.055m3 CH4, it had characteristic odor to a fermentation process (silage). Therefore, the prototype project developed ensured that it is possible to use simple materials for its manufacture and to obtain the biogas and biofertilizer production, but the end of the experiment makes it clear that for a next project a more advanced study, that is, to analyze the manure used , biogas composition and design gas storage out of the drum, use a more accurate pressure gauge and conduct analysis of biofertilizer micronutrients, as well as design a vegetable garden to monitor soil and plant performance.