logging in or signing up On Biofuels from Algae minimonster620 Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: Embed: Flash iPad Copy Does not support media & animations WordPress Embed Customize Embed URL: Copy Thumbnail: Copy The presentation is successfully added In Your Favorites. Views: 337 Category: Entertainment License: All Rights Reserved Like it (0) Dislike it (0) Added: December 06, 2010 This Presentation is Public Favorites: 1 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript On Biofuels from Algae : On Biofuels from Algae by Julius Garcia Fall 2010 Algae : Algae Large and diverse group of simple, autotrophic organisms Eukaryotes that constitute a paraphyletic and polyphyletic group Many are photoautotrophic Algae’s Potential as Biofuel : Algae’s Potential as Biofuel Microalgae have the potential to produce 5000 to 15,000 gallons of biodiesel per year per acre John Sheehan USDOE Aquatic Species Program Algae’s Advantage as Biofuel : Algae’s Advantage as Biofuel Growing algae consumes carbon dioxide, reducing it’s carbon footprint. Renewable energy source. Makes crops such as corn, soybeans, etc., more available as feedstock instead of being used for biofuel production, keeping prices for such resources low. Growing Algae Biofuel : Growing Algae Biofuel Commonly grown in ponds. cross-contamination unstable growth of cultures, due to variations in the external environment temperature light exposure Growing Algae Biofuel : Growing Algae Biofuel Use photobioreactors Controlled environment maximizes algae biomass production optimal colony growth optimal light exposure optimal carbon dioxide input Mulumba & FaragUniversity of New Hampshire : Mulumba & FaragUniversity of New Hampshire Designed photobioreactor for high yield algal biomass production Established a technique for optimum harvesting and processing of algae Mulumba & FaragUniversity of New Hampshire : Mulumba & FaragUniversity of New Hampshire Material and Methods Selected seven algal strains for fast growth and high oil content. Each strain was grown in a 2L clear glass flask and was exposed to light from fluorescent lamps. Air was provided to each flask to homogenize the growth medium and supply carbon dioxide. Mulumba & FaragUniversity of New Hampshire : Mulumba & FaragUniversity of New Hampshire Strains C and D yielded high algal concentration (optical density) shown in Figure 1 with low lipid content. Strain A yielded high lipid content with good algal concentration. (source: Mulumba and Farag) Materials & Methods : Materials & Methods Photobioreactor consisted of clear PVC tubing mounted in two spirals a main tank containing algal solution fluorescent lamps carbon dioxide source and air sources a pump to keep the algal solution in motion to prevent biomass from sticking to tubing. Results : Results Yield of 1g of dry algae biomass per liter of broth with a culture in less than two weeks. The algae biomass yield contained 12.8% algal crude (0.128g of crude oil per 1g dry algal biomass). 50% improvement in yield using their described photobioreactor over a cylindrical photobioreactor with the same strain A. Results : Results Figure 2. Concentration of mature culture (dry algal biomass per unit volume of algal broth) after two weeks. (source: Mulumba and Farag) Discussion & Conclusion : Discussion & Conclusion Photobioreactor demonstrated the “possibility of producing significant amount of [algae] biomass at high scale.” Experiment lasted 2 weeks predicted production levels are extrapolated data Discussion & Conclusion : Discussion & Conclusion Photobioreactors are expensive to build and maintain. Cost of manufacturing photobioreactors should be taken into account when determining the cost effectiveness of this technique. Discussion & Conclusion : Discussion & Conclusion photobioreactors cost to operate is greater than $100/m2 open ponds are less than $10/m2 John R. Brenemann, Ph.D. International Network on Biofixation of Carbon Dioxide and Greenhouse Gas Abatement with Microalgae Discussion & Conclusion : Discussion & Conclusion Biodiesel from algae is likely still a viable additional energy source. High yields are theoretically possible; yet to be proved Cost to manufacture biodiesel from algae needs to come down in order to compete successfully with petroleum-based diesel. You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.