Factors influencing the growth of Spirulina platensis in closed photobioreactors under CO2 – O2 conversion

Abstract

Since there is growing interest throughout the world in photosynthetic microbes as a potential source of food or food supplements, an assessment of factors which influence the biomass obtained in bioreactors, protein contents and constituents is important. This work reviews the autotrophic cultivation conditions of Spirulina platensis especially the dependency on the strain, the composition of the nutrient solution, pH, temperature of the medium, light intensity and color as well as exposure rhythm, the flow rate and composition of the aerating gas mixture and the bubble size, the content of oxygen, CO 2 and HCO 3 in the medium and last but not least from the optical density of the spirulina suspension during growth.

Influence of Different Light-Emitting Diode Colors on Growth and Phycobiliprotein Generation of Arthrospira platensis

“…Studies on optimizing the production yield of AP show that, among other factors, the light color (and of course intensity [ 28 ]) can influence the build-up of biomass but also of various ingredients [ 29 , 30 , 31 ]. On a molecular level, pigments and phycobiliproteins play a pivotal role for these processes.…”

Cyanobacteria and Algal-Based Biological Life Support System (BLSS) and Planetary Surface Atmospheric Revitalizing Bioreactor Brief Concept Review

“…Below a threshold of light intensity, Arthrospira will begin respiration and have a net production of carbon dioxide. For this reason, the light intensity must be maintained above a certain level and the density of the biomass must be kept beneath a certain optical density to ensure adequate light exposure [ 71 ].…”

Lipophilic and Hydrophilic Compounds from Arthrospira platensis and Its Effects on Tissue and Blood Cells—An Overview

“…All of these compounds are described to have different effects on blood or tissue cells. In general, one has to bear in mind that kinds and concentrations of the ingredients depend on the environmental conditions during growth, such as illumination and temperature, nutrients in the culture medium, aeration, and especially the supply with minerals, as well as the conditions during the extraction process [ 9 ]. This can explain the broad range of variety of ingredients in different studies.…”