ISSN 2756-3863
International Journal of Manures and Fertilizers Vol. 2 (4), pp. 298-304, April, 2013. © International Scholars Journals
Full Length Research Paper
Digestion of cattle manure and biodegradable kitchen waste to increase biogas production using rumen fluid as inoculums
Misganaw R.1, Desalegn F. Habte2 and Imru S.2
1Department of Plant Science, College of Agriculture, Arba Minch University, Arba Minch, Ethiopia. 2Department of Horticulture, Faculty of Agriculture, Mizan–Tepi University, Mizan Teferi, Ethopia. Email:[email protected]
Abstract
Accepted 22 March, 2013
Anaerobic co-digestion strategies are needed to enhance biogas production when treating certain residues such as cattle/pig manure. Co-digestion of food waste with animal manure or other feedstocks with low carbon content can improve process stability and methane production. In this study, anaerobic digestion and co-digestion of cattle manure with organic kitchen waste using rumen fluid as inoculums have been experimentally tested to determine the biogas potential. Co-digestion substantially increased the biogas yields by 24 to 47% over the control (organic kitchen waste and dairy manure only). The highest methane yield of 14,653.5 ml/g-VS was obtained with 75% organic kitchen waste (OKW) and 25% cattle manure (CM) additions. In contrast, addition of 75% cattle manure caused inhibition of the anaerobic digestion process, and its cumulative methane yield was 23% lower than that with 25% cattle manure addition.
Key words: Cattle manure, co-digestion, methane, organic kitchen waste, rumen fluid.