Relevance of biogas technology to Vhembe district of the Limpopo province in South Africa

Abstract

Biogas is a clean and renewable form of energy available to low-income households through anaerobic digestion of readily available organic waste. A biodigester converts fermentable organic matter into a combustible gas and organic manure. Anaerobic digestion is a process of subjecting the material to microbial decomposition in the absence of air, yielding finally, methane, carbon dioxide, and water inside the biodigester. In the recent years, biogas has attracted wide attention in view of the fuel crisis and the environmental pollution associated with the fossil fuel, and its importance as an efficient and non-polluting energy source is now well appreciated. The objectives of this desktop study are to investigate the relevance of biogas technology use for substitution of solid fuels in rural areas of Vhembe district, the subsequent health co-benefits, and the constraints to adoption of domestic biogas technology in South Africa. The correlating factors influencing decisions in the sustainable adoption and utilisation of biogas technology in Vhembe district of Limpopo Province in South Africa are examined. In this study, the sampled households involved 72 biogas users and 128 non-users. The sampling techniques was purposive and simple random. The study was based on primary data that was elicited using open and closed-ended questionnaires. The logistic regression model was employed for data analysis. The energy demand of low-income South African households for cooking with fuelwood was found to be 27 MJ/day and the total energy demand 68 MJ/day. Approximately 625 000 households in Vhembe district can potentially benefit from bio-digester fed with cattle and pig waste, on the basis of livestock numbers. Most governments worldwide are now considering locally accessible, available, and renewable substitute energy options.