title: Spirulina platensis is more efficient than Chlorella homosphaera in carbohydrate productivity.
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-1of 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.
authors: a Laboratory of Biochemical Engineering, School of Chemistry and Food Engineering , Federal University of Rio Grande , Rio Grande , RS , Brazil.
authors: Ana Cláudia
authors: http://orcid.org/0000-0003-0212-5862
authors: AC
authors: Margarites
authors: b Laboratory of Fermentations, Course of Food Engineering, College of Engineering and Architecture , University of Passo Fundo , Passo Fundo , RS , Brazil.
authors: Noany
authors: http://orcid.org/0000-0002-5185-3260
authors: N
authors: Volpato
authors: b Laboratory of Fermentations, Course of Food Engineering, College of Engineering and Architecture , University of Passo Fundo , Passo Fundo , RS , Brazil.
authors: Elenara
authors: http://orcid.org/0000-0002-2806-7616
authors: E
authors: Araújo
authors: b Laboratory of Fermentations, Course of Food Engineering, College of Engineering and Architecture , University of Passo Fundo , Passo Fundo , RS , Brazil.
authors: Luana Garbin
authors: http://orcid.org/0000-0003-2280-8134
authors: LG
authors: Cardoso
authors: b Laboratory of Fermentations, Course of Food Engineering, College of Engineering and Architecture , University of Passo Fundo , Passo Fundo , RS , Brazil.
authors: Telma Elita
authors: http://orcid.org/0000-0002-8944-3398
authors: TE
authors: Bertolin
authors: b Laboratory of Fermentations, Course of Food Engineering, College of Engineering and Architecture , University of Passo Fundo , Passo Fundo , RS , Brazil.
authors: Luciane Maria
authors: http://orcid.org/0000-0001-9745-4452
authors: LM
authors: Colla
authors: a Laboratory of Biochemical Engineering, School of Chemistry and Food Engineering , Federal University of Rio Grande , Rio Grande , RS , Brazil.
authors: Jorge Alberto Vieira
authors: http://orcid.org/0000-0001-8042-7642
authors: JAV
authors: Costa
mesh_terms: D018533:Biomass; D050260:Carbohydrate Metabolism; D002241:Carbohydrates; D002708:Chlorella; D058086:Microalgae; D053545:Spirulina
chemical_list: D002241:Carbohydrates
keywords: Carbohydrates; fed-batch culture; glucose; growth kinetics; microalgae; stress conditions