The potential for biomethane from grass and slurry to satisfy renewable energy targets

Investigation of effect of particle size and rumen fluid addition on specific methane yields of high lignocellulose grass silage

“…All other treatments, regardless of particle size or rumen fluid addition, had marginally lower k-values in the range of 0.10-0.13. The k-values calculated were similar to the range previously reported for grass silage and can be compared to k-values for food waste and sea lettuce of 0.43 and 0.23, respectively (Allen et al, 2013;Wall et al, 2013). The coefficient of determination (R 2 ) was at a satisfactory range.…”

“…Grass silage, a substantial crop resource, has also been recognised for its potential contribution . It has been reported that digesting grass silage and dairy slurry on a 1:1 volatile solids (VS) basis can achieve over 10% renewable energy supply in transport (RES-T) using just 1.1% of grassland in the country (Wall et al, 2013). However, grass is not a homogenous feedstock and its chemical characteristics can vary significantly .…”

Impact of including land-use change emissions from biofuels on meeting GHG emissions reduction targets: the example of Ireland

“…This is in line with recent works in Ireland. Grasslands are abundant in Ireland and McEniry et al (2013) and Wall et al (2013) argue that there is more than enough grass to sustain demands for both agriculture and biomethane production. 1.1 % of grassland would generate 10 % of renewable energy in transport, if co-digested with dairy slurry (Wall et al 2013).…”

“…Grasslands are abundant in Ireland and McEniry et al (2013) and Wall et al (2013) argue that there is more than enough grass to sustain demands for both agriculture and biomethane production. 1.1 % of grassland would generate 10 % of renewable energy in transport, if co-digested with dairy slurry (Wall et al 2013). Biomethane is deemed to be a solution for an indigenous advanced biofuel and achieving the RES-T target (Singh et al 2010).…”

“…By using only 1.1 % of grassland, the 2020 target of 10 % share of renewables in transport (RES-T) can be achieved through co-digestion with dairy slurry (Wall et al 2013). Therefore in case of ILUC?…”