Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7080195 | Bioresource Technology | 2013 | 7 Pages |
Abstract
A biomethane potential (BMP) assessment of grass silage yielded 107 m3 CH4 tâ1. Long term mono-digestion of grass silage can suffer due to a deficiency in essential nutrients; this may be overcome by co-digesting with slurry. Mono-digestion of slurry achieved a low yield of 16 m3 CH4 tâ1. BMP assessments at a range of co-digestion ratios indicated methane yields were between 4% and 11% lower than the values calculated from mono-digestion. This paper suggests that co-digestion of the majority of slurry produced from dairy cows in Ireland with grass silage quantities equivalent to 1.1% of grassland on a 50:50 volatile solids basis would generate over 10% renewable energy supply in transport (RES-T). The industry proposed would equate to 170 digesters each treating 10,000 t aâ1 of grass silage and 40,000 t aâ1 of slurry from dairy cows.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Process Chemistry and Technology
Authors
David M. Wall, Padraig O'Kiely, Jerry D. Murphy,