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Complementary Production of Biofuels by the Green Alga Chlorella vulgaris

Year 2015, Volume: 5 Issue: 3, 936 - 943, 01.09.2015

Abstract

There is increasing growing concerns about global warming and rising of oil prices. The aim of the current work was to evaluate the potential of the green alga Chlorella vulgaris as a renewable energy source in term of biofuels. Alga was hetero-trophically grown under both vegetative and induction-conditions. Induction was proceed to enhance cell metabolites mainly oils (for biodiesel) and carbohydrates (for bioethanol-production). BG-II growth medium was used for vegetative growth, while such medium was enriched by ferrous sulfate, sodium acetate and sodium chloride under high light irradiation for induction purposes. De-fatted dried algal cells were subjected to bioethanol production through three different treatments prior yeast fermentation to increase the fermentable sugars content after oils were extracted from algae. This includes direct treatment by Tricoderma sp., acid hydrolysis and molasses addition. Saccharomyces cerevisiae was used in fermentation action. Results indicated that the oil content of stressed algal cultures was raised to be 14.8% with 26.7% of total carbohydrates versus to 32.14% of crude protein. Fatty acids profile resulted in an increase of saturated fatty acids by about 10.65 %, while unsaturated fatty acids were decreased by 18.57%. Third day of incubation seems to be the optimum for direct fermented or pre acid hydrolyzed-alga in terms of yeast biomass, consumed sugar and alcohol percent By such time 15% of molasses represented the same manner. Also, the maximum alcohol content (38.7%) by acid hydrolyzed; while direct fermentation resulted in 28.7% versus to 36.3% of molasses addition.

Year 2015, Volume: 5 Issue: 3, 936 - 943, 01.09.2015

Abstract

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Details

Primary Language English
Journal Section Articles
Authors

Shimaa Ragab Hamed This is me

Manal G. Mahamoud This is me

Abo-el-khair B. El-sayed This is me

Publication Date September 1, 2015
Published in Issue Year 2015 Volume: 5 Issue: 3

Cite

APA Hamed, S. R., Mahamoud, M. G., & El-sayed, A.-e.-k. B. (2015). Complementary Production of Biofuels by the Green Alga Chlorella vulgaris. International Journal Of Renewable Energy Research, 5(3), 936-943.
AMA Hamed SR, Mahamoud MG, El-sayed AekB. Complementary Production of Biofuels by the Green Alga Chlorella vulgaris. International Journal Of Renewable Energy Research. September 2015;5(3):936-943.
Chicago Hamed, Shimaa Ragab, Manal G. Mahamoud, and Abo-el-khair B. El-sayed. “Complementary Production of Biofuels by the Green Alga Chlorella Vulgaris”. International Journal Of Renewable Energy Research 5, no. 3 (September 2015): 936-43.
EndNote Hamed SR, Mahamoud MG, El-sayed A-e-kB (September 1, 2015) Complementary Production of Biofuels by the Green Alga Chlorella vulgaris. International Journal Of Renewable Energy Research 5 3 936–943.
IEEE S. R. Hamed, M. G. Mahamoud, and A.-e.-k. B. El-sayed, “Complementary Production of Biofuels by the Green Alga Chlorella vulgaris”, International Journal Of Renewable Energy Research, vol. 5, no. 3, pp. 936–943, 2015.
ISNAD Hamed, Shimaa Ragab et al. “Complementary Production of Biofuels by the Green Alga Chlorella Vulgaris”. International Journal Of Renewable Energy Research 5/3 (September 2015), 936-943.
JAMA Hamed SR, Mahamoud MG, El-sayed A-e-kB. Complementary Production of Biofuels by the Green Alga Chlorella vulgaris. International Journal Of Renewable Energy Research. 2015;5:936–943.
MLA Hamed, Shimaa Ragab et al. “Complementary Production of Biofuels by the Green Alga Chlorella Vulgaris”. International Journal Of Renewable Energy Research, vol. 5, no. 3, 2015, pp. 936-43.
Vancouver Hamed SR, Mahamoud MG, El-sayed A-e-kB. Complementary Production of Biofuels by the Green Alga Chlorella vulgaris. International Journal Of Renewable Energy Research. 2015;5(3):936-43.