Magnetic field as promoter of growth in outdoor and indoor assays of Chlorella fusca

• Published in: Bioprocess and biosystems engineering 2021-07, Vol.44 (7), p.1453-1460
• Main Authors: Deamici, Kricelle Mosquera, Santos, Lucielen Oliveira, Costa, Jorge Alberto Vieira
• Format: Article
• Language: English
• Subjects: Assaying; Biomass; Biotechnology; Biotechnology - methods; Chemistry; Chemistry and Materials Science; Chlorella; Chlorella - growth & development; Chlorella fusca; Chlorophyll - chemistry; Cultivation; Energy expenditure; Environmental Engineering/Biotechnology; Food Science; Hydrogen-Ion Concentration; Indoor air pollution; Indoor environments; Industrial and Production Engineering; Industrial Chemistry/Chemical Engineering; Kinetics; Macromolecules; Magnetic Fields; Microalgae - metabolism; Nitrates - chemistry; Photobioreactors; Proteins; Research Paper; Scenedesmus
• ISSN: 1615-7591; 1615-7605
• DOI: 10.1007/s00449-021-02526-6

This study aimed to evaluate the influence of a magnetic field (MF) intensity of 25 mT on  Chlorella fusca  cultivation in outdoor and indoor conditions, and evaluate the changes in the macromolecules, pigment content and protein profile.  C. fusca  was cultivated for 15 d in raceway photobioreactor. MF was applied for 24 h d −1 and 1 h d −1 . In outdoor cultivation, MF applied for 24 h d −1 increased 23% in the biomass concentration, while indoor assays resulted in an increase in both modes, with biomass production increasing between 70 and 85%. Biomass composition was altered when MF was applied for 1 h d −1 in indoor assays; the highest protein content was achieved (32.7%). Nitrate consumption was higher in outdoor assays, while MF application did not alter the protein profile. The results showed that combining the outdoor conditions with MF is advantageous, as higher biomass concentration can be achieved with lower energy expenditure.