Issue 27, 2016

The effects of light and temperature on microalgal growth and nutrient removal: an experimental and mathematical approach

Abstract

Cultivation of microalgae and cyanobacteria has been intensified in the last decades, due to the numerous applications described for these microorganisms. However, the high process costs associated with biomass production systems reduce the economic feasibility of microalgal/cyanobacterial cultivation. A better understanding of the effects of light and temperature on growth kinetics will contribute to the improvement of biomass productivities and reduce the costs associated with the optimization of culture parameters. In this study, the effects of average daily light irradiance and temperature on growth and nutrient removal were assessed using Chlorella vulgaris, Pseudokirchneriella subcapitata, Synechocystis salina and Microcystis aeruginosa. Additionally, a mathematical model relating specific growth rates with these variables was developed. Both kinetic growth parameters and nutrient removal had similar responses to light and temperature: increasing light supply, higher specific growth rates, biomass productivities and nutrient removal efficiencies were achieved. Among the studied temperatures, all microorganisms presented higher biomass productivities and nutrient removal efficiencies at 25 °C. Regarding the results from the mathematical model, the optimal temperature for the selected microorganisms was 25.3 ± 1.1 °C. On the other hand, the optimal average daily light irradiances varied with the species, being 208, 258, 178 and 140 μE m−2 s−1 for C. vulgaris, P. subcapitata, S. salina and M. aeruginosa, respectively.

Graphical abstract: The effects of light and temperature on microalgal growth and nutrient removal: an experimental and mathematical approach

Supplementary files

Article information

Article type
Paper
Submitted
07 Dec 2015
Accepted
20 Feb 2016
First published
22 Feb 2016

RSC Adv., 2016,6, 22896-22907

Author version available

The effects of light and temperature on microalgal growth and nutrient removal: an experimental and mathematical approach

A. L. Gonçalves, J. C. M. Pires and M. Simões, RSC Adv., 2016, 6, 22896 DOI: 10.1039/C5RA26117A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements