Abstract
The development of biofuels as an alternative to the use of fossil fuels is growing worldwide due to environmental concerns and energy independence; thus, considerable technical progress has been achieved in biofuel production. Microalgae have been widely used for nutrient removal during wastewater treatment and produce compounds that can be used as feedstock for biofuel synthesis. In this work, the green microalga Coelastrum sp. was cultivated using industrial wastes: molasses as the carbon source and synthetic wastewater as the culture medium to determine the potential of its use for biofuel production. The use of synthetic wastewater (SWW) and molasses improved biomass production when compared with cultures carried out in a standard laboratory culture medium, such as tris-acetate-phosphate (TAP). Growth rates of 0.31 and 1.4 day−1 were attained during exponential growth rate with SWW and molasses and TAP media, respectively. The best results in biomass and lipid content, 2.29 ± 0.05 and 0.71 ± 0.03 g L−1, were obtained after 15 days of culture in SWW with molasses. The analysis of the lipid profile, produced by Coelastrum sp. cultured under these conditions, determined that the microalga can be considered as a high-quality feedstock for producing green diesel, bio-jet fuel, or biodiesel.
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Funding
The authors gratefully acknowledge the ASA-CONACYT financial support Grant No. 243145 for this project and CONACYT for María Guadalupe del Rayo Serrano-Vázquez scholarship No. 338220.
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Glossary
- ASTM
-
American Society of Testing Materials
- BD
-
Biodiesel
- BJ
-
Bio-jet fuel
- EN
-
European Standards
- E-T
-
Esterification + transesterification
- FAME
-
Fatty acid methyl ester
- FFA
-
Free fatty acids
- FT-IR
-
Fourier transform infrared spectroscopy
- GD
-
Green diesel
- H
-
High quality
- H/C
-
Hydrogen to oxygen atomic ratio
- HC
-
Hydrocarbons
- HC
-
Hydrocracking
- HEFA
-
Hydrotreatment process for obtaining bio-jet fuel and green diesel
- HI
-
Hydroisomerization
- M
-
Medium quality
- NIST
-
National Institute of Standards and Technology
- NMX
-
Official Mexican Norm
- PQ
-
Potential quality as product or feedstock
- TLC
-
Thin layer chromatography
- TG
-
Triglycerides
- SWW
-
Synthetic wastewater
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Valdez-Ojeda, R.A., del Rayo Serrano-Vázquez, M.G., Toledano-Thompson, T. et al. Effect of Media Composition and Culture Time on the Lipid Profile of the Green Microalga Coelastrum sp. and Its Suitability for Biofuel Production. Bioenerg. Res. 14, 241–253 (2021). https://doi.org/10.1007/s12155-020-10160-5
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DOI: https://doi.org/10.1007/s12155-020-10160-5
Keywords
- Synthetic wastewater
- Molasses
- Triacylglycerides
- Transesterification
- Algal metabolites