Peer-Reviewed Journal Details
Mandatory Fields
Wall, DM;Straccialini, B;Allen, E;Nolan, P;Herrmann, C;O'Kiely, P;Murphy, JD
2015
September
Bioresource Technology
Investigation of effect of particle size and rumen fluid addition on specific methane yields of high lignocellulose grass silage
Validated
WOS: 25 ()
Optional Fields
ANAEROBIC-DIGESTION CO-DIGESTION ENERGY CROPS DAIRY SLURRY MICROORGANISMS BIOMASS MANURE WASTE FERMENTATION DEGRADATION
192
266
271
This work examines the digestion of advanced growth stage grass silage. Two variables were investigated: particle size (greater than 3 cm and less than 1 cm) and rumen fluid addition. Batch studies indicated particle size and rumen fluid addition had little effect on specific methane yields (SMYs). In continuous digestion of 3 cm silage the SMY was 342 and 343 L CH4 kg(-1) VS, respectively, with and without rumen fluid addition. However, digester operation was significantly affected through silage floating on the liquor surface and its entanglement in the mixing system. Digestion of 1 cm silage with no rumen fluid addition struggled; volatile fatty acid concentrations rose and SMYs dropped. The best case was 1 cm silage with rumen fluid addition, offering higher SMYs of 371 L CH4 kg(-1) VS and stable operation throughout. Thus, physical and biological treatments benefited continuous digestion of high fibre grass silage. (C) 2015 Elsevier Ltd. All rights reserved.
OXFORD
0960-8524
10.1016/j.biortech.2015.05.078
Grant Details