A review of the state of biomass energy technologies in Zimbabwe

Biomass supplies about 66% of total energy consumption in Zimbabwe. In recent times there has been an increasing interest in the country to increase the utilization of biomass resources for energy purposes. The major biomass materials found in Zimbabwe are fuelwood, crop and forestry residues, animal dung, energy crops, municipality and industrial wastes. Biomass energy conversion technologies include anaerobic digestion, pyrolysis, gasification, transesterification, fermentation and combustion. The premise of this paper is that as a component of a renewable energy mix, biomass should play an important role in sustainable energy systems in Zimbabwe. With an estimated total energy value of 409 pJ, biomass is a huge energy resource for the country and must be optimally exploited. However, traditional utilization of solid biomass materials as a primary source of energy continues to be prevalent in Zimbabwe today. The trend should be to move from traditional biomass energy to improved and modern biomass energy technologies. This is evidenced by numerous projects that have been undertaken in pursuit of this endeavor. The aim of this paper is to review the state of biomass energy technologies in Zimbabwe with a view to provide aggregated information that will inform research, development and policies related to biomass energy. (C) 2013 Elsevier Ltd. All rights reserved.