The effects of static magnetic field on the growth of microalgae Nannochloropsis and Spirulina in a bubble column photobioreactor and investigation on the growth models

Document Type : Original Article

Authors

1 Department of Biotechnology and Environment, Faculty of Chemical Engineering, Amirkabir University of Technology, Tehran, Iran.

2 Department of Chemical Engineering, Faculty of Engineering, University of Bojnord, Bojnord, Iran.

Abstract

Magnetic fields interact with biological systems and affect the metabolism of microorganisms such as microalgae. In fact, it can change the rate of photosynthesis and the composition of macromolecules inside the algal cell. These fields can affect the growth of microorganisms in three ways: inhibiting, stimulating, and null. For this purpose, in this study, the growth of the microalgae, Nannochloropsis oculata and Spirulina platensis, under a static magnetic field of 2.5 mT in a bubble column photobioreactors have been investigated. All conditions, including culture medium, light intensity, temperature, pH and inoculation rate for a period of 14 days were considered the same for all photobioreactors. The results showed that the static magnetic field with the intensity of 2.5 mT is a growth stimulant and has increased the biomass productivity of the studied microalgae by 34% and 10%, respectively. Also, Gompertz growth model has shown more compliance with experimental data in the conditions where microalgae have been affected by the field.

Keywords

References

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Aquaculture Sciences
Volume 10, Issue 2
October 2022
Pages 47-57

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