The potential of algae blooms to produce renewable gaseous fuel

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.…”

Stabilisation of microalgae: Iodine mobilisation under aerobic and anaerobic conditions

“…2b). This yield was similar to some reported values for algae material that was stabilised anaerobically without pre-treatment (Allen et al, 2013;Nkemka and Murto, 2010). Carbon mass balance showed 172 ± 9.2 mg g À1 VS added (aerobic) and 182 ± 12 mg g À1 VS added (anaerobic) carbon remained in solid phase after degradation, which indicated 54 ± 7.3% (aerobic) and 52 ± 3.7% (anaerobic) of the total carbon was mobilised (Fig.…”

Co-generation of biohydrogen and biomethane through two-stage batch co-fermentation of macro- and micro-algal biomass

“…However, some major challenges, such as unsuitable C/N ratios and low biodegradabilities (Allen et al, 2013a;Murphy et al, 2015), limit the potential for commercial and sustainable applications of algal biofuels. The high C/N ratios in some macro-algae can lead to volatile fatty acid (VFA) accumulation and lack of nitrogen resource for the microorganisms .…”

“…However, El-Mashad (2013) used the mixture of S. platensis and switchgrass to investigate biogas production and found that there was no significant synergistic or antagonistic effect. Low ratios of specific methane yields to theoretical biomethane potential in single-stage anaerobic digestion of algal biomass suggests that there is significant energy remaining in the effluents and digestibility needs to be improved (Allen et al, 2013a).…”