Abstract: Renewable energy could replace the conventional sources of energy such as fossil fuel and oil, serving as an alternative source of energy. Non-renewable energy sources have been found to pose various environmental problems such as greenhouse gas emissions as they tend to deplete at faster rates. Biological processes such as fermentation and anaerobic digestion for the past decades have given rise to the production of biofuels such as biogas and bioethanol. Biogas production is environmentally friendly and simple to produce although some drawbacks have limited its full exploitation in the past decades such as the physical and chemical treatment techniques required in the process.