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Environ Technol. 2017 Sep;38(17):2209-2216. doi: 10.1080/09593330.2016.1254685. Epub 2016 Nov 21.

Spirulina platensis is more efficient than Chlorella homosphaera in carbohydrate productivity.

Author information

1
a Laboratory of Biochemical Engineering, School of Chemistry and Food Engineering , Federal University of Rio Grande , Rio Grande , RS , Brazil.
2
b Laboratory of Fermentations, Course of Food Engineering, College of Engineering and Architecture , University of Passo Fundo , Passo Fundo , RS , Brazil.

Abstract

This study aimed to compare the production of biomass with high carbohydrate content by Spirulina platensis LEB 52 and Chlorella homosphaera microalgae. The cultivation of C. homosphaera and S. platensis LEB 52 was performed in standard medium diluted at 50%, and glucose was added as a source of organic carbon for mixotrophic metabolism. The sodium nitrate concentration was increased and the nitrogen components were reduced in the media to induce the synthesis of carbohydrates. C. homosphaera and S. platensis LEB 52 produced 16.32 and 116 mg L-1 of carbohydrates per day, respectively, when cultivated with 50% less nitrogen and 20% and 10% more sodium chloride, compared with the control. Glucose addition was an essential factor for microalgal growth, resulting in biomass increases of up to 2.79- and 3.45-fold for C. homosphaera and S. platensis LEB 52, respectively. Spirulina presented better characteristics than Chlorella with regard to the capacities of growth and carbohydrate synthesis.

KEYWORDS:

Carbohydrates; fed-batch culture; glucose; growth kinetics; microalgae; stress conditions

PMID:
27790947
DOI:
10.1080/09593330.2016.1254685
[Indexed for MEDLINE]

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