 Synergies from co-digesting grass or clover silages with cattle slurry in in vitro batch anaerobic digestionH. Himanshu, J.D. Murphy, J. Grant and P. O'Kiely Renewable Energy, 2018, vol. 127, issue C, 474-480 Abstract: Co-digestion of forage silage with cattle slurry can greatly extend the stability of methanogenesis as compared to mono-digestion of the silage. Biogas and methane yields of the mixtures of perennial ryegrass silage (grass harvested at two growth stages i.e. stem elongation vs. floral development) with cattle slurry and of red clover silage (clover harvested at two growth stages i.e. mid-vegetative vs. early seed-pod development) with cattle slurry were measured, and synergistic effects were investigated. Silage and slurry were incubated as sole substrates or as part of binary mixtures (forage silage:cattle slurry ratios of 1:0, 0.75:0.25, 0.5:0.5, 0.25:0.75 and 0:1 on a volatile solid basis). The maximum measured synergistic effects for perennial ryegrass silages with cattle slurry and red clover silages with cattle slurry were observed at 0.75:0.25 and 0.5:0.5 (forage silge:cattle slurry), respectively. The forage silage:cattle slurry ratio to produce the maximum synergistic effects differed with the forage species ensiled and its growth stage when harvested. Keywords: Co-digestion; Synergy; Silage; Slurry (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:127:y:2018:i:c:p:474-480 DOI: 10.1016/j.renene.2018.04.086 Access Statistics for this article Renewable Energy is currently edited by Soteris A. Kalogirou and Paul Christodoulides More articles in Renewable Energy from Elsevier |
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