Growing Algae for Biofuel Søren Laurentius Nielsen Department of Environmental, Social and Spatial Change

Biofuel Fuel derived from biological material CO 2 – neutral (or at least nearly so) 1 st generation 2 nd generation Beyond 2 nd generation Department of Environmental, Social and Spatial Change

1 st generation biofuel Made from sugar, starch, oils, fats Using conventional technology –Direct use of oils –Transesterification –Fermentation Source often seeds or grain Department of Environmental, Social and Spatial Change

Problems: Taking up arable land, that could be used for food production Diverting food away from the human food chain –Food shortages –Rising prices May use fertilizer and pesticides in the production Department of Environmental, Social and Spatial Change

2 nd generation biofuel Made from non-food crops, waste biomass etc. Utilizing cellulosic ethanol production Does not divert food away from the human food chain Department of Environmental, Social and Spatial Change

Problems: Production of ethanol from cellulose not tecnically straightforward May still compete for arable land with food production if based on crops grown for fuel Department of Environmental, Social and Spatial Change

3 rd generation biofuel Enter the algae! Fast growth – several 100 % per day Oil content comparable to oilseeds = Very high yields, ~ 100 times that of oilseed Department of Environmental, Social and Spatial Change

Advantages of using algae Uses 1 st generation technology (transesterification) for biofuel production No diversion of food from the human food chain No competition for arable land The use of marine microalgae means no need for or pollution of potable water No need for pesticides Necessary nutrients can come from sewage, cleansing it in the process Department of Environmental, Social and Spatial Change

Potential problems Will it be possible to achieve sufficient cell densities? Will it be possible to achieve sufficiently fast growth rates under natural light in these latitudes? Will it be possible to find species that fulfill these criteria and have a high oil content? Department of Environmental, Social and Spatial Change

AGEPS consortium ZCD d.o.o. (biodiesel production) Active Pool GmbH (pool engineering) Uljarice d.o.o. (algal cake production) University of Nova Gorica (algal knowledge) Roskilde University (algal knowledge) University of Ljubljana (animal nutrition) Current application – EU FP7, Research for SMEs, € (total budget € ) Department of Environmental, Social and Spatial Change

Nutrients Bioreactor Ultrasonic harvest system Bioreactor Ultrasonic harvest system Extraction Biodiesel processor Biodiesel processor Biodiesel Algal cake CO 2 O2O2 Harvested algae Water return Algal oil

However, the use of algae for biodiesel is not unique for this project Estimate that € will take us from lab to pilot production (”biological feasibility”) –Lab tests of the suitability of various algae –Bioreactor production –Initial field production tests Department of Environmental, Social and Spatial Change

More information: Department of Environmental, Social and Spatial Change