4.6 Article

Organic Carbon Is Ineffective in Enhancing the Growth of Dunaliella

期刊

FERMENTATION-BASEL
卷 8, 期 6, 页码 -

出版社

MDPI
DOI: 10.3390/fermentation8060261

关键词

mixotrophic growth; wastewater reuse; protein; essential amino acids; Dunaliella tertiolecta

资金

  1. Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior-Brasil (CAPES) [001]
  2. Brazilian National Council for Scientific and Technological Development (CNPq) [310228/2019-0]
  3. Fundacao de Amparo a Pesquisa do Estado do Rio Grande Do Sul [19/2551-0002026-0]
  4. UKRI Science and Technology Facilities Council (STFC) Food Network+ (SFN)
  5. European Regional Development Fund [ValgOrize 2S05017]
  6. Interreg 2 Seas Programme 2014-2020

向作者/读者索取更多资源

This study evaluates the effect of different carbon sources on the growth and protein profile of Dunaliella tertiolecta CCAP 19/30. The results indicate that D. tertiolecta cannot grow mixotrophically using organic carbon, while NaHCO3 is a more suitable carbon source for its growth.
(1) Background: Mixotrophic growth is commonly associated with higher biomass productivity and lower energy consumption. This paper evaluates the impact of using different carbon sources on growth, protein profile, and nutrient uptake for Dunaliella tertiolecta CCAP 19/30 to assess the potential for mixotrophic growth. (2) Methods: Two experimental sets were conducted. The first assessed the contribution of atmospheric carbon to D. tertiolecta growth and the microalgae capacity to grow heterotrophically with an organic carbon source to provide both carbon and energy. The second set evaluated the impact of using different carbon sources on its growth, protein yield and quality. (3) Results: D. tertiolecta could not grow heterotrophically. Cell and optical density, ash-free dry weight, and essential amino acids index were inferior for all treatments using organic carbon compared to NaHCO3. Neither cell nor optical density presented significant differences among the treatments containing organic carbon, demonstrating that organic carbon does not boost D. tertiolecta growth. All the treatments presented similar nitrogen, phosphorus, sulfur recovery, and relative carbohydrate content. (4) Conclusions: Based on the results of this paper, D. tertiolecta CCAP 19/30 is an obligated autotroph that cannot grow mixotrophically using organic carbon.

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