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Determining the Optimum Proportion of Shea Waste in Anaerobic Co-Fermentation Process
Abstract
In search for an alternative source of energy, various feedstocks and wastes are being investi-gated to identify their potential in methane generation through anaerobic digestion. The addition of cattle manure to the predominant substrate is reported to have positive effect on the co-fermentation process thereby improving the buffer capacity. The manure is also essential for the digestion in order to have a relatively stable process. The proportion of cattle manure in the mix substrate influences the stability of the anaerobic digestion process. In this study co-fermentation treatments with varying proportions of shea waste and cattle manure were investi-gated. It was found out that only the treatment with 50% by volume of cattle manure showed process stability, producing biogas with high methane content.
Keywords: anaerobic digestion, co-fermentation, process stability, co-substrate, shea waste
