1. Production of algal biomass in coastal lagoons Søren Laurentius Nielsen Department of Environmental, Social and Spatial Change Roskilde University, Denmark

2. Purpose: To assess the feasibility of algal biomass production in a low-tech, local setting Focus on pollution mitigation –Nutrients (coastal eutrophication) –CO 2 Bioenergy and production of high-value products a secondary priority

3. Lolland

4. Onsevig lagoons

11. 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

12. Søllested Could we grow algae in municipal waste water? Yes – with microalgae (Chlorella vulgaris)

13. The set-up

14. Harvesting

15. Growth curves Doubling time 3.5 days

16. Production – over 300 hrs.

17. Results from Søllested Production of microalgal biomass is feasible in municipal waste water CO 2 – addition from district heating enhances growth Good potentials Much further work needed concerning best practise and best use of biomass

18. 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

19. Visions – off shore algal production