Reduction of electricity bills by use of biogas at the University of Namibia – Rundu campus

Abstract

Abstract: Renewable energy has been identified as a viable means of securing a sustainable present and future for developing countries because of it accessibility and affordability. A lot of studies have been on biogas as a renewable source of energy, but there is little paucity on its implementation in developing countries. The social acceptance of biogas is often hampered by environmental and health concerns. This study presents a preliminary evaluation of the role and the contribution of biogas as a sustainable energy source towards cost saving and achievement of the sustainable development goals. This work reviews the different types of biogas digesters, opportunities and possibilities of producing biogas for cooking at UNAM Rundu Campus as a secondary source of energy are explored. The design criteria for optimal performance is described and explained. The most suitable model is proposed and the monetary value of the de design is also determined. A preliminary survey was carried to examine the areas where the stoves are used in the kitchen and the hostels. The population and the electricity consumption within the campus was recorded by a detailed inquiry. The data collected from the bills was used to determine the kitchen block unit power demand. The quantity of gas produced was calculated. The results show that biogas has direct impacts and contributions to the SDGs. It has the ability to increase renewable energy, reduce climate change, enhance the waste management process, and create jobs. The use of biogas for cooking reduces significantly the bills of electricity on campus. It is one of the promising renewable energy sources that can effectively reduce the environmental impact of fossil fuels. Key words: Biogas; digester; electricity, renewable energy, SDGs