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Production of algal biomass in coastal lagoons

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									 Production of algal biomass in
       coastal lagoons
Søren Laurentius Nielsen

Department of Environmental,
Social and Spatial Change

Roskilde University, Denmark
                  Purpose:
• To assess the feasibility of algal biomass
  production in a low-tech, local setting
• Focus on pollution mitigation
  – Nutrients (coastal eutrophication)
  – CO2
• Bioenergy and production of high-value
  products a secondary priority
Lolland
Onsevig lagoons
    Results from Onsevig lagoons
• Significant nutrient retention in biomass –
  but room for improvement
• Low ethanol conversion efficiency – needs
  more work
• Methane yield from fermentation of
  biomass residues comparabel with or
  larger than the yield from corn
               Søllested
                        Could we grow algae in
                        municipal waste water?




Yes – with microalgae
(Chlorella vulgaris)
The set-up
Harvesting
Growth curves

            Doubling time 3.5 days
Production – over 300 hrs.
      Results from Søllested
• Production of microalgal biomass is
  feasible in municipal waste water
• CO2 – addition from district heating
  enhances growth
• Good potentials
• Much further work needed concerning best
  practise and best use of biomass
                The future
• An Algal Innovation Center has just opened on
  Lolland
• We are developing proposals for European
  Union funding
   – FP7
   – COST
• We invite interested collaborators!
• We are interested in biofuels, high-value
  products and pollution mitigation
Visions – off shore algal
       production

								
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