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A major challenge for next decades is development of competitive renewable energy sources, highly needed to compensate fossil fuels reserves and reduce greenhouse gas emissions. Among different possibilities, which are currently under investigation, there is the exploitation of unicellular algae for production of biofuels and biodiesel in particular. Microalgae have the ability of accumulating large amount of lipids within their cells which can be exploited as feedstock for the production of biodiesel. The lipid content of different species of microalgae can range from 30%-70% of their dry weight. In this project a microalgae with lipid content of 60.095% was used. This means that 26gms of oil was obtained from 42gms of microalgae sample from which 17.624gm of biodiesel (FAME) was found at the end of trans-esterification. Algae biofuels avoid some of the previous drawbacks associated with crop-based biofuels as the algae do not compete with food crops. The favorable growing conditions found in many developing countries has led to a great deal of speculation about their potentials for reducing oil imports, stimulating rural economies, and even tackling hunger and poverty. Strong research efforts are however still needed to fulfill this potential and optimize cultivation systems and biomass harvesting.
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p.1-10,fig.,ref.
Twórcy
autor
- Department of Chemical Engineering, KIOT, Wollo University, (SW), Ethiopia
autor
- Department of Biological and Chemical Engineering, MIT, Mekelle University, (TR), Ethiopia
autor
- Department of Biological and Chemical Engineering, MIT, Mekelle University, (TR), Ethiopia
autor
- Department of Biological and Chemical Engineering, MIT, Mekelle University, (TR), Ethiopia
Bibliografia
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- [4] Pyle, DJ, Garcia RA, (2008). Producing docosahexaenoic acid (DHA)-rich algae fromBiodiesel-derived crude glycerol: Effects of impurities on DHA production and algal biomass composition. Journal of Agricultural and Food Chemistry, 103 (1): 3933-3939.
- [5] Chisti Y. (2007). Biodiesel from microalgae. Biotechnology Advances 25(3): 297-301.
- [6] Sanchez A, Gonzalez A, Maceiras R, Cancela A, Urrejola S., (2011). Raceway pond design for microalgae culture for biodiesel. Chemical Engineering Transition, 64: 845–50.
- [7] Carla S, Jones Stephen P, Mayfield (2012). Algae biofuels: versatility for the future of bioenergy, 5-6: available at www.sciencedirect.com
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- [10] Basha, SA, Gopal KR, Jebaraj, S. (2009). A review on biodiesel production, combustion, emissions and performance. Renewable and Sustainable Energy Reviews, 13(6-7): 1628-1630.
- [11] Simionato D. (2013). Optimization of light use efficiency for biofuel production in algae, Biophysical Chemistry, 39(1): 45-52.
- [12] Abraham M, Asmare, Berhanu A, Demessie, Ganti S, Murthy, (2013).Theoretical Estimation of Algal Biomass Potential and Lipid Productivity for Biofuel Production in Ethiopia. International Journal of Science and Research, 45: 285-294.
- [13] Williams PJ, Laurens LM, (2010). Microalgae as biodiesel and biomass feedstocks: Review and analysis of the biochemistry, energetic and economics. Energy and Environmental Science, 3: 554-557.
- [14] Doucha J, Livansky K, (2006). Productivity CO2/O2 exchange and hydraulics in outdoor open high density microalgal (Chlorella sp.) photobioreactors operated in a Middle and Southern European climate. Journal of Applied Physiology 18: 811-815.
- [15] Ranjan A, Patil C, Moholkar VS., (2010). Mechanistic assessment of microalgal lipid extraction. Industry Engineering and Chemistry Research, 36: 2979-2981.
- [16] Zhang BY, Geng YH, Li ZK, Hu HJ, Li YG., (2009). Production of astaxanthin from Haematococcus in open pond by two-stage growth one-step process. Aquaculture; 275-278.
- [17] Veillette M, Chamoumi M, Nikiema J, Faucheux N, Heit M, (2012). Production of Biodiesel from Microalgae. Journal of Chemical Engineering and Biotechnological Engineering Department, 8-11.
- [18] El Sikaily, A., A. Khaled, (2006). Removal of Methylene Blue from aqueous solution by marine green alga Ulva lactuca. Chemistry and Ecology 22(2): 149-151.
- [19] Kebede-Westhead E, Pizarro C, (2006). Treatment of swine manure effluent using freshwater algae: Production, nutrient recovery, and elemental composition of algal biomass at four effluent loading rates. Journal of Applied Physiology 18(1): 41-46.
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- [21] Michael B. Johnson, (2009). Microalgal Biodiesel Production through a Novel Attached Culture System and Conversion Parameters. Journal of Biological Systems Engineering, 4-9.
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Bibliografia
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