Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8085875 | Algal Research | 2018 | 6 Pages |
Abstract
Sugar kelp (Saccharina latissima) is an abundantly available macroalgae species along the Norwegian coast, and there is currently emerging an industry based on seaweed cultivation. In this study, the biomass growth of cultivated S. latissima deployed in February was studied at cultivation depths of 3 and 8â¯meters (m) and monitored over the period of May, June, and August. The highest biomass production was observed in June at the depth of 3â¯m (38.3â¯kg wet weight mâ2). Furthermore, all seaweed samples underwent a detailed chemical characterization including analysis of carbohydrates (glucose, mannitol, fucose, xylose, uronic acids), amino acids and minerals. The macroalgae deployed in February at 3â¯m depth and sampled in June had the highest proportion of total sugars (534.5â¯gâ¯kgâ1 of DM) and the lowest content of ash (252.7â¯gâ¯kgâ1 of DM). Thus, cultivation at 3â¯m and harvesting in June are suitable when the feedstock is used for biochemical production of fuels and chemicals. Macroalgae deployed at 8â¯m depth and harvested in August had the highest proportion of total amino acids (242.4â¯gâ¯kgâ1 DM) and ash content (411.5â¯gâ¯kgâ1 DM). This biomass may be suitable as a nitrogen and mineral source in microbial growth media. Overall, the choice of cultivation depth and harvesting time depends on the intended use of the seaweed biomass.
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Authors
Sandeep Sharma, Luiza Neves, Jon Funderud, Liv Torunn Mydland, Margareth Ãverland, Svein Jarle Horn,