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Biogas Potential of Co-digestion of Food Wastes and Manure

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  2011 Louisville, Kentucky, August 7-10, 2011  1111331.(doi:10.13031/2013.38989)
Authors:   Johnson D Bryan, Marie C Hoepfl, James B Houser
Keywords:   Anaerobic digestion, biogas, organic materials, resource conservation, energy conversion, food waste recovery, waste management, greenhouse gas emissions, co-digestion, feedstocks, waste to energy

The differences in biogas production from anaerobic digestion (AD) of food waste collected from Appalachian State Universitys Food Services were investigated. Two different variables, particle size reduction and co-digestion of food waste with horse manure were experimentally tested for biogas production and compared against control variables including no particle size reduction and no co-digestion, respectively. The results indicated that particle size reduction and co-digestion have strong correlations with biogas production. Additional tests were taken for carbon/nitrogen (C/N) ratio and moisture content (MC) of the food waste. The results are congruent with related studies that indicate that food waste is sufficient for AD and biogas production.

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