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Bioprospecting and characterization of temperature tolerant microalgae from Bonaire
Journal article   Open access   Peer reviewed

Bioprospecting and characterization of temperature tolerant microalgae from Bonaire

Robin J.P. Barten, Rene H. Wijffels and Maria J. Barbosa
Algal research (Amsterdam), Vol.50, p.102008
09/01/2020
DOI: 10.1016/j.algal.2020.102008
url
https://doi.org/10.1016/j.algal.2020.102008View
Published (Version of record) Open Access

Abstract

Control of temperature is a major challenge for industrial microalgae production in photobioreactors outdoors. Strains with tolerance for high temperatures can reduce the cost of production as active temperature control is not required. In this study, marine photoautotrophic microorganisms were isolated to reduce the need for control of high temperature. Twenty-two samples were taken from different saline waters on the Caribbean island Bonaire. During strain enrichment, a temperature of 40 °C was used as selective pressure and strains with the highest growth rate were selected. We isolated and identified 59 strains, after which 5 were selected for characterization on growth rate and biomass composition. Picochlorum sp. and Leptolyngbya sp. showed optimal growth at 40 °C and 35 °C with a growth rate of 0.12 h−1 during daytime, respectively. The strains contain 62.1% and 68.2% of protein and have varying fatty acid compositions suitable for application as edible oil and biofuel. •Fifty-nine photoautotrophic marine microalgae were isolated from Bonaire.•Five species showed potential for growth in a photobioreactor.•Growth rates of five microalgae were determined from 25 °C to 45 °C.•Picochlorum sp. and Leptolyngbya sp. show a growth rate of 3 per day.•Fatty acid profiles of the microalgae are suitable as edible oil or as biofuel.
Biomass composition Bioprospecting Fatty acids Growth rate Microalgae Thermo-tolerant

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