Mixotrophic growth of microalgae on volatile fatty acids is determined by their undissociated form
| Autor: | R. van Lis, J. Lacroux, Nicolas Bernet, Eric Trably, Jean-Philippe Steyer |
|---|---|
| Přispěvatelé: | Laboratoire de Biotechnologie de l'Environnement [Narbonne] (LBE), Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), PhD fellowship from European Union from the Occitanie region, France, with complementary funding from FEDER., National Research Institute for Agriculture, Food and Environment, ANR-14-CE04-0011,Phycover,Durabilité des productions microalgales par recyclage du phosphore et de l'azote des eaux résiduaires : vers la station d'épuration du futur(2014) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
020209 energy Chlamydomonas reinhardtii 02 engineering and technology Butyrate Auxenochlorella Butyric acid Acetic acid 01 natural sciences chemistry.chemical_compound 010608 biotechnology 0202 electrical engineering electronic engineering information engineering Microalgae Food science Chlorella sorokiniana biology pH [SDE.IE]Environmental Sciences/Environmental Engineering biology.organism_classification chemistry Fermentation Agronomy and Crop Science Mixotroph Dark fermentation |
| Zdroj: | Algal Research-Biomass, Biofuels and Bioproducts Algal Research-Biomass, Biofuels and Bioproducts, Elsevier, 2020, 47, pp.101870. ⟨10.1016/j.algal.2020.101870⟩ |
| ISSN: | 2211-9264 |
| DOI: | 10.1016/j.algal.2020.101870⟩ |
| Popis: | The influence of pH and substrate concentration on the mixotrophic growth of five microalgae species in presence of acetate or butyrate was evaluated. Acutodesmus obliquus, Auxenochlorella protothecoides, two strains of Chlamydomonas reinhardtii, and Chlorella sorokiniana were cultivated at pH from 5 to 10. Acetate was efficiently assimilated by all strains while butyrate uptake was greatly strain dependent. Growth rates at pH values above 8 were reduced while values below 5 or 6 inhibited growth on acetate and butyrate respectively. The influence of acetic and butyric acid concentration was tested. It was demonstrated that the main factor affecting microalgae growth is the concentration of undissociated acid, which can be controlled by pH adjustment. The strains exhibited inhibition threshold concentrations of 71–207 mg·L−1 for acetic acid and of 13–25 mg·L−1 for butyric acid. These findings are crucial for proper control of processes coupling bacterial fermentation and microalgae cultures. |
| Databáze: | OpenAIRE |
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