Evaluation of Biogas Production Potential from Organic Waste from the Yaounde Industrial Slaughterhouse and Sizing of a Biomethanation Unit

Abstract

The purpose of this work is to propose a method for recovering organic slaughterhouse waste from the industrial slaughterhouse in Yaounde. Biogas production is the basis of this, which can be utilized as a source of energy, either thermal or electrical. In this study which has the Industrial Slaughterhouse of Yaounde as a site of study, the overall organic slaughterhouse waste production potential, biogas production potential, and energy (thermal and electricity) were assessed and the values obtained are respectively 4 616 298 kg/year, 373.6 x 103 m3 CH4/year, 6 455.6 x 103 MJ/year, and 560.4 MW/year. The anaerobic fermentation of 25 kilograms of organic matter, comprising 15 kilograms of rumen waste and 10 kilograms of manure, in combination with 25 liters of water in a 60-liter cask utilized as a digester, was also carried out. The total volume of biogas collected after 30 days of anaerobic digestion is 223.4 L. One of the major expenses at the Industrial Slaughterhouse of Yaounde is related to electricity need, which is about 16,302 kWh/month. Based on the daily potential flow of effluent produced at the ISHY, we could size a digester with a volume of 910 m3. Biogas production is thus proving to be a solution with a multifunctional advantage, as it is not only reducing the organic waste to be managed, but also produces an energy source that can be used for several purposes, including electrical energy.