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Isolation of a freshwater microalgae and its application for the treatment of wastewater and obtaining fatty acids from tilapia cultivation

  • Advances in Environmental Biotechnology and Engineering 2018
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Abstract

In the present study, isolated strains of the microalgae Chlamydomonas sp. (CH) and Chlorella vulgaris (CV) were used to treat aquaculture wastewater and to obtain fatty acids and from a fattening culture of tilapia. The microalgae were cultivated for 11 days in tubular photobioreactors with an operating volume of 2 L, constant aeration and illumination. High removal rates of NO3 and PO43− were achieved for both Chlamydomonas sp. (84.7% and 96%, respectively) and Chlorella vulgaris (94.6 and 97.9%, respectively). The maximum biomass productivity achieved by Chlamydomonas sp. was 0.06 and 0.10 gL−1d−1 for Chlorella vulgaris. Therefore, tilapia wastewater contained the necessary nutrient concentration for algal growth and development. Chlamydomonas sp. biomass lipid content was 69%, while that of Chlorella vulgaris was 40%. The lipid profile of both microalgae was abundant in palmitic acid (78% for Chlamydomonas sp. and 35% for Chlorella vulgaris). This fatty acid is suitable for biodiesel production. Tilapia wastewater is low-cost alternative culture medium as it contains the necessary nutrient concentration for microalgae development and growth.

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Acknowledgments

CONACYT granted a scholarship to CAM-G (594666).

Funding

This work was financially supported by the Proyectos de Desarrollo Científico para Atender Problemas Nacionales 2015 CONACYT (Project PN 2015–1346) and TecNM (6287.19-P).

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Correspondence to Ana Line Vázquez-Larios.

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The authors declare that they have no competing interest.

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Responsible editor: Ta Yeong Wu

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Morando-Grijalva, C.A., Vázquez-Larios, A.L., Alcántara-Hernández, R.J. et al. Isolation of a freshwater microalgae and its application for the treatment of wastewater and obtaining fatty acids from tilapia cultivation. Environ Sci Pollut Res 27, 28575–28584 (2020). https://doi.org/10.1007/s11356-020-08308-z

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  • DOI: https://doi.org/10.1007/s11356-020-08308-z

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