Influence of CO2 and light spectra on the enhancement of microalgal growth and lipid content

Abstract

The effect of different light spectrum and CO2 concentrations on the growth and lipid content of Micractinium pusillum and Ourococcus multisporus was investigated. The highest biomass yields (2.9 and 2.6 g-dry cell weight l−1) were observed for M. pusillum and O. multisporus, respectively, at 5% CO2 with red light illumination. Red light spectrum with 5% CO2 supported the highest lipid contents (20% and 27%) and lipid productivity (32 and 36 mg l−1 d−1) for M. pusillum and O. multisporus, respectively. The highest fatty acid methyl esters content for both microalgal species was observed under red light spectrum and 5% CO2 conditions, with the oleic acid fraction ranging between 35% and 37%. This study showed that the red light spectrum and 5% CO2 were the optimum conditions for maximum growth, lipid content and lipid productivity of both microalgae species, which could be further exploited to establish a microalga-based biodiesel production strategy.

Use of tar color additives as a light filter to enhance growth and lipid production by the microalga Nannochloropsis gaditana

“…Studies using monochromatic illumination indicate that light quality can improve cellular growth and lipid content at the same time [16,17]. However, the optimal wavelength seems to depend on the species and other factors [18][19][20][21][22][23][24][25][26]. Moreover, it is difficult to scale-up laboratory experiments that use monochromatic light from light emitting diodes (LEDs), because of cost considerations.…”

Identification of microalgae cultured in Bold’s Basal medium from freshwater samples, from a high-rise city

“…Coelastrum sp. and Asterarcys quadricellulare have nutrition and pharmaceutical potential 41 , 42 . Parachlorella beijerinckii is currently employed in the cosmetics industry 43 .…”

Assuaging Microalgal Harvesting Woes via Attached Growth: A Critical Review to Produce Sustainable Microalgal Feedstock

“…On another note, the application of the same light intensity but different light colors can also influence the formation of the biofilm structure, later impacting the growth of attached microalgae [131]. Each color of the light sources has different spectra as well as illumination value [131] and this phenomenon can be observed based on the cellcell interactions of the cell's physicochemical properties [132].…”

“…On another note, the application of the same light intensity but different light colors can also influence the formation of the biofilm structure, later impacting the growth of attached microalgae [131]. Each color of the light sources has different spectra as well as illumination value [131] and this phenomenon can be observed based on the cellcell interactions of the cell's physicochemical properties [132]. The attached microalgal cells that are cultured under white light illumination with an optimum photoperiod can form a heterogeneous biofilm with many voids, giving rise to high biofilm porosity and roughness.…”