Bioköhler model biodigester mass balance supplied with dairy cattle manure

Abstract

The transformations of animal production systems have led to significant advances in the sector. However, these transformations have also produced environmental problems, due to the concentration and scale of activity. Therefore, it is of fundamental importance to explore new alternatives to mitigate the problem and also to add value to the generated waste. Studies aimed at the generation and use of biogas from these wastes have increasingly gained visibility, proving to be an interesting alternative. The objective of this study was to verify the mass balance of a Bioköhler biodigestor model supplied with bovine milk manure. The experiment was carried out in a 20 m³ biodigestor located at the Experimental Station Antonio Carlos dos Santos Pessoa, belonging to UNIOESTE - Campus of Marechal Cândido Rondon, from 08/03/2014 to 07/02/2015. Density data were obtained of the tributaries and effluents, total, fixed and volatile solids values, volume of biogas produced and methane content present in this biogas. The results indicated that the expected average capacity of biogas production was around 12 m³ per day and an average of 57.33% of methane was obtained in this biogas. There was removal of volatile solids and this was satisfactory.