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Slide 1 - Algae to Biodiesel Joshua J. Heller Department of Chemical Engineering The University of Texas at Austin
Slide 2 - Presentation Overview Background Algae Technology Open Pond Bioreactor Greenhouse Challenges Conclusion
Slide 3 - Background Growing U.S. and World demand for diesel Approximately 30 billion gallons per year (U.S. only) Renewable fuel mandates 36 billion gallons of biofuel per year by 2022 Future carbon legislation Cap and Trade/Carbon Tax
Slide 4 - Background Cont. Compatible with existing technology Engines Infrastructure Versatile growing environment Non-arable land Will not displace food crops Potentially reduces greenhouse gases
Slide 5 - Algae Main sources of energy Lipids Fatty acids Lipid accumulation Environmental stress Greater under nutrient deficient conditions
Slide 6 - Algae Cont. Algae holds significant advantage over other oilseed crops Does not require arable land More efficient in term of oil per acre 15,000 acres of algae farms required to meet U.S. transportation fuel demand Optimistic calculation 1/7th the area of Colorado
Slide 7 - Technology – Open Pond National Renewable Energy Laboratory Relatively cheap Synergy with power plant waste CO2 and waste water nutrients
Slide 8 - Technology – Bioreactor Increased surface area Turbulent mixing Power plant pollutant scrubber Capital costs relatively more expensive
Slide 9 - Technology - Greenhouse Small scale Greater temperature control Need access to local processing facility
Slide 10 - Challenges Cost Capital and operations $0.50 to $10.00 per square foot Product separation - $0.02 to $ 20 per gallon of product Productivity Efficiency Photosynthesis limitations 3 to 4 % of sunlight converted to biomass Light saturation
Slide 11 - Conclusion High potential Variety of developing technologies Several challenges Bridge fuel One piece of the “all of the above” energy solution approach
Slide 12 - Questions?
Slide 13 - References Briggs, Michael. Widescale Biodiesel Production from Algae. University of New Hampshire Physics Department. 23 Nov. 2008 . Gualtieri, Paolo, and Laura Barsanti. Algae : Anatomy, Biochemistry, and Biotechnology. Boca Raton: Taylor & Francis, 2006. Larkum, Anthony, Susan E Douglas, and John A Raven. Photosynthesis In Algae. Boston: Kluwer Academic Publishers, 2003. Nelson, Richard. "SOLAROOF : Green Buildings for Urban Agriculture and Solar Living ." Solaroof. 23 Nov. 2008 . Riesing, Thomas F. "Cultivating Algae for Liquid Fuel Production." Permaculture Activist 59. 23 Nov. 2008 . United Nations. Food and Agriculture Organization. "Oil production." Renewable biological systems for alternative sustainable energy production. Osaka: Food and Agriculture Organization, 1997. United States. National Renewable Energy Laboratory. A Look Back at the U.S. Department of Energy's Aquatic Species Program - Biodiesel from Algae. Golden: National Renewable Energy Laboratory, 1998. Whitton, Norman. Future Fuels - Algae. N.p.: n.p., n.d.