Abstract: “A biogas production unit was designed, fabricated and tested. It consists of a 168-litres anaerobic digester and a 38-litres gas storage tank connected together with 19 mm PVC pipes and locks. The digester and the separator tanks were fabricated from a high torsional strength 20 mm x 20 mm x 4 mm mild steel sheet supported by 60 mm x 60 mm x 4 mm angle iron welded together. Filler paste was applied to the two tanks for air tightness. The digester has a 900 mm shaft with blades attached that stirs the substrate. The machine is powered by a 0.75 kW electric motor connected to the side of the digester tank. A rubber seal was attached to the top of the stirrer to prevent the escape of gas from the tank. A pressure gauge and a gas connecting hose were attached for the measurement of the amount of gas produced, stored and released to the cooker respectively. Air and water tightness tests were carried out to avoid unnecessary leakage at any point. Plant and animal wastes were utilized as feed”

Keywords: biogas, digester, separator, tank, feedstock, methane