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Submitted July 15, 2021
Published 2021-07-14

Artículos

Vol. 23 No. 2 (2021): Tecnociencia

BIOGAS IN MICROALGAE CULTURE: POTENTIAL SOURCE OF CARBON DIOXIDE IN PHOTOBIOREACTORS


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Citación:
DOI: ND

Published: 2021-07-14

How to Cite

Caballero Espinosa, M., Uribe, E., Atencio, T., Collantes G., R. D. and Pittí Caballero, J. (2021) “BIOGAS IN MICROALGAE CULTURE: POTENTIAL SOURCE OF CARBON DIOXIDE IN PHOTOBIOREACTORS”, Tecnociencia, 23(2), pp. 169–193. Available at: https://revistas.up.ac.pa/index.php/tecnociencia/article/view/2273 (Accessed: 24 November 2024).

Abstract

The massification of microalgae culture in photobioreactors requires high volumes of carbon dioxide (CO2), to be captured in microalgae biomass; but the use of chemical salts makes production more expensive. This high supply of CO2 to the microalgae culture can be provided by biogas, due to its high percentage of CO2 and methane (CH4); both of them, liberated to the atmosphere, are greenhouse gases. In this study, biogas was used in combustion for the cultivation of the microalgae Nannochloropsis oculata, as an alternative source of CO2. This, in order to control the pH in the microalgae culture and to contribute carbon. For this, combusted biogas was stored and diluted to concentrations at 0.5% and 1.1% of CO2; with atmospheric CO2 as control. The data were analyzed using Student's t test, at an ? of 0.05. According to the results, significant differences were found in pH, where the optimal balance in the gas-liquid interface for N. oculata was obtained at a solution of 0.5% of CO2, maintaining a pH of 7.79. In conclusion, biogas provides an economically and environmentally viable alternative for the mass production of microalgae in photobioreactors.

 

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