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Introduction. Results. Trial 1 : Effects of cattle diet on microbial community. Eubacteria Archaea. Trial 1 Seven, 1 L anaerobic digesters Cattle Diets: Control WDGS 82.5% DRC 47.5% DRC 5% Molasses 40% WDGS 7.5% Alfalfa 7.5% Alfalfa 5% Supplement 5% Supplement 0.986% Urea Trial 2
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Introduction Results Trial 1:Effects of cattle diet on microbial community EubacteriaArchaea Trial 1 Seven, 1 L anaerobic digesters Cattle Diets: ControlWDGS 82.5% DRC 47.5% DRC 5% Molasses 40% WDGS 7.5% Alfalfa 7.5% Alfalfa 5% Supplement 5% Supplement 0.986% Urea Trial 2 Cattle Housing: Open LotConfinement Manure OM 26% 88% Trial 3 Ten, 45 L anaerobic digesters Cattle Housing: “Pure” manure 80% OM Soil surface of pen 10% OM Stockpiled 20% OM Fresh 25% OM Cement pad 50% OM WDGS CONT 177 137 Conclusions Trial 1 Manure from cattle fed WDGS had increased methane potential compared to corn based CONT Dietary changes can lead to changes in microbial community that provide opportunities to alter methane production from cattle manure Trial 2 Open lot manure can be used as anaerobic digester feedstock if ash buildup is avoided Trial 3—In progress Strategically harvesting manure may enhance methane production from open lot manure and allow the feedlot industry to implement anaerobic digestion of manure 47 87 Soil surface Cement Pad
