Influence of nutrients and LED light intensities on biomass production of microalgae Chlorella vulgaris

Abstract

Microalgae are viable sources of biological compounds for biodiesel production. In this study, effects of various types of nitrogen sources and nutrients concentrations in the growth medium and different LED light wavelengths and intensities on biomass production of green algae Chlorella vulgaris were investigated. Warm white light with 80 µmol/m 2 /sec light intensity was determined as the optimal light for biomass production. The results indicated that microalgae growth with urea as nitrogen source was higher than that of other nitrogen sources such as sodium nitrate, ammonium carbonate and ammonium chloride. Maximum biomass concentration (1.37 g/L) was obtained under the following media compositions: urea 0.25 g/L, K 2 HPO 4 0.04 g/L, MgSO 4 · 7H 2 O 0.06 g/L, and ammonium ferric citrate 0.01 g/L. Microalgae growth data under the different light wavelengths and intensities were fitted with a mathematical model.

Macro and Micro Algae in Pollution Control and Biofuel Production – A Review

“…Macroalgae demonstrate multiple groups of eukaryotic, photosynthetic, and aquatic organisms. The macroalgae species are multicellular with plant‐like specifications and are known as seaweeds . The common appearance of macroalgae structures is extremely diverse.…”

“…Since microalgae are photosynthetic organisms, they need a light source for their growth . They can easily capture CO 2 gas and convert it to high value by‐products like carbohydrates, lipids, and vitamins , .…”

Biochemical responses to bicarbonate supplementation on biomass and lipid productivity of Chlorella Sp. BTA9031 isolated from Coalmine area

“…BTA 9031 was able to grow in media containing 0.75 gL 21 sodium nitrate which ultimately reduces the cultivation cost to certain extent. Khalili et al (2015) reported the use of ammonium chloride and ammonium carbonate as a source of nitrogen for cultivation of C. vulgaris. Results revealed that 0.236 gL 21 of ammonium chloride and 0.212 gL 21 of ammonium carbonate produced a biomass of 0.50 and 0.40 gL 21 , respectively.…”

“…Results revealed that 0.236 gL 21 of ammonium chloride and 0.212 gL 21 of ammonium carbonate produced a biomass of 0.50 and 0.40 gL 21 , respectively. When compared to ammonium chloride and ammonium carbonate, sodium nitrate proved to a better nitrogen source because it helped produce a much higher biomass of 0.789 gL 21 at the end of cultivation [26].…”

In vivo determination of carotenoid resonance excitation profiles of Chlorella vulgaris, Haematococcus pluvialis, and Porphyridium purpureum

“…[20] Its main commercial application is lipid production [21] for biofuel. [22] The storage location [23] and pathways for lipid [24] and carotenoid [25] synthesis differ, therefore, it is unlikely that lipid production will influence carotenoid measurements. Additionally, lipid Raman spectra [26] differ from carotenoid Raman spectra and can be easily spotted, if present.…”