Abstract
The initial hydrolysis and acidogenesis of L. hyperborea fronds wereinvestigated in anaerobic batch fermentations. The main product in theacidogenesis of fronds and fronds added extra substrates was acetate.Addition of extra glucose led to a diauxic development with glucose as thepreferred substrate and delayed initiation of alginate lyase activity. Additionof extra mannitol did not affect the initiation of lyase activity, butmaximum activity was reduced. Addition of products such as acetate andpropionate also resulted in a delayed lyase activity. The fermentation ofpure fronds resulted in a high acetate/CO2 ratio, suggesting that thehomoacetogenic pathway played an important role in the degradation ofuronic acids. Addition of mannitol or glucose resulted in a much loweracetate/CO2 ratio and an initial decrease in soluble CODconcentration, probably caused by biomass growth and possibly someH2 production. Thus, the seasonal changes of mannitol and laminaranin L. hyperborea fronds will result in different digestion characteristicsfor this algae throughout the year.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
