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- Title
Chemical and Physical Affinity of Microalga–Azospirillum Consortium Co-cultured in Suspension During CO<sub>2</sub> Fixation from Biogas.
- Authors
Barbosa-Nuñez, Jorge Alejandro; Palacios, Oskar A.; Mondragón-Cortez, Pedro; Ocampo-Alvarez, Héctor; Becerril-Espinosa, Amayaly; Nevárez-Moorillón, Guadalupe Virginia; Choix, Francisco J.
- Abstract
This study evaluated the ability of the bacterium Azospirillum brasilense to establish a synergic association with the microalgae Chlorella sp. and Scenedesmus sp. co-cultured in suspension and supplied with biogas (75% CH4–25% CO2). The results demonstrated that under the stressful composition of biogas, signal molecule production, such as indole-3-acetic acid (IAA) and tryptophan (Trp) production by the bacterium and microalgae, respectively, allowed the maintenance of their affinity and mutualistic association. Chlorella sp. and Scenedesmus sp. co-cultured in suspension with the bacterium showed higher CO2 fixation rates, 0.29 ± 0.05 and 0.31 ± 0.06 g·L−1·day−1, respectively, than cultured alone, 0.17 ± 0.04 and 0.22 ± 0.03 g·L−1·day−1. Similarly, biomass production of Chlorella sp. (1.4 ± 0.4 g·L−1) and Scenedesmus sp. (1.6 ± 0.5 g·L−1) and their cell composition—mainly carbohydrates and proteins—also enhanced in both microalgae interacting with the bacterium. Overall, these results indicate that, co-cultured in suspension, this consortium microalga–A. brasilense did not change its mutualistic interaction during the specific conditions of CO2 capture from biogas.
- Subjects
CHEMICAL affinity; CONSORTIA; BIOGAS production; SCENEDESMUS; CHLORELLA vulgaris; AZOSPIRILLUM brasilense; BIOGAS; BIOMASS production
- Publication
BioEnergy Research, 2023, Vol 16, Issue 1, p579
- ISSN
1939-1234
- Publication type
Article
- DOI
10.1007/s12155-022-10411-7