Mixotrophic cultivation of Spirulina platensis in dairy wastewater: Effects on the production of biomass, biochemical composition and antioxidant capacity
| Autor: | Guilherme Fulgencio Medeiros, L. H. F. Borba, Roberto Sassi, Emerson Moreira de Aguiar, Bruna M. E. Chagas, Júlio César de Andrade Neto, Emanuelle Patrícia Enrique da Silva, Maria I. B. Pereira, Adriano Henrique do Nascimento Rangel |
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| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Biomass Wastewater 010501 environmental sciences Biochemistry 01 natural sciences Antioxidants chemistry.chemical_compound Nutrient Medicine and Health Sciences Bioenergy Gallic acid Food science Materials Growth medium Multidisciplinary Ecology Organic Compounds Fatty Acids food and beverages Lipids Dairying Chemistry Biofuel Physical Sciences Medicine Carbohydrate Metabolism Engineering and Technology Cheeses Research Article Ecological Metrics Bioalcohols Science Materials Science Carbohydrates Industrial Waste Bioethanol Fuels Phenols Ecological Productivity Whey 010608 biotechnology Spirulina Spirulina (dietary supplement) Autotroph Nutrition 0105 earth and related environmental sciences Organic Chemistry Ecology and Environmental Sciences Chemical Compounds Biology and Life Sciences Diet Energy and Power chemistry Food Biofuels Mixotroph |
| Zdroj: | PLoS ONE PLoS ONE, Vol 14, Iss 10, p e0224294 (2019) |
| ISSN: | 1932-6203 |
| DOI: | 10.1371/journal.pone.0224294 |
| Popis: | Mixotrophic cultivation of microalgae provides a very promising alternative for producing carbohydrate-rich biomass to convert into bioethanol and value-added biocompounds, such as vitamins, pigments, proteins, lipids and antioxidant compounds. Spirulina platensis may present high yields of biomass and carbohydrates when it is grown under mixotrophic conditions using cheese whey. However, there are no previous studies evaluating the influence of this culture system on the profile of fatty acids or antioxidant compounds of this species, which are extremely important for food and pharmaceutical applications and would add value to the cultivation process. S. platensis presented higher specific growth rates, biomass productivity and carbohydrate content under mixotrophic conditions; however, the antioxidant capacity and the protein and lipid content were lower than that of the autotrophic culture. The maximum biomass yield was 2.98 ±0.07 g/L in growth medium with 5.0% whey. The phenolic compound concentration was the same for the biomass obtained under autotrophic and mixotrophic conditions with 2.5% and 5.0% whey. The phenolic compound concentrations showed no significant differences except for that in the growth medium with 10.0% whey, which presented an average value of 22.37±0.14 mg gallic acid/g. Mixotrophic cultivation of S. platensis using whey can be considered a viable alternative to reduce the costs of producing S. platensis biomass and carbohydrates, shorten cultivation time and produce carbohydrates, as it does not require adding expensive chemical nutrients to the growth medium and also takes advantage of cheese whey, an adverse dairy industry byproduct. |
| Databáze: | OpenAIRE |
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