Changes in higher heating value and ash content of seaweed during ensiling

A problem in the use of macroalgae for biofuel is that harvesting of seaweed is generally seasonal, and there is a need to preserve and store seaweed to supply year-round production processes. Ensiling is a widely used preservation method in agriculture, but there is little research on ensiling seaweed. The changes in ash content, higher heating value (HHV) and dry matter (DM%) of algal biomass together with mass loss (ML) during ensilage for a year was studied for two species of seaweed, Laminaria digitata (LD),and Palmaria palmata (PP) with and without the addition of Lactobacillus plantarum. The mean ash content of the two species was significantly different (LD 24.3% and PP 18.0%) and remained constant after 90 days ensiling. The mean HHV before ensiling for PP was higher, 14.2 kJ g-1, compared to LD, 11.9 kJ g 1. Both the species (P <0.05) and ensilage period (P