Biogas production through anaerobic codigestion of industrial and urban organic waste

Abstract

In order to minimize environmental impacts, such as contamination of soil, water and atmosphere, caused by the generation of residues from agribusiness, livestock and urban centers, the energy use of these residues appears as an alternative. Characterized as a biological treatment technology, anaerobic biodigestion, besides reducing the organic matter content of the waste, produces biogas capable of generating energy. Because several variables and conditions affect the production of this biofuel, organic waste codigestion positively adds, in many cases, in the efficiency of biogas production, taking into account the reach of a better nutrient condition, as well as the temperature factor of great importance. The objective of this work, therefore, was to determine the potential for biogas generation from effluent codigestion from the production of parboiled rice with organic solid waste from the University Restaurant of the Federal University of Pelotas and other codigestion using only the waste generated by the University Restaurant. The experiment was performed for 252 hours at room temperature and at 35° C. As main result, it was observed that the effluent codigestion from the rice parboiling process maintained at 35° C showed higher efficiency in the production of biogas with a volume of approximately 7.45 dm³.