Growth, lipid content, and lipid profile of the green alga, Chlorella vulgaris Beij., under different concentrations of Fe and CO2

Issue Date

1-2015

Abstract

The effects of Fe+3 (2.4E-05 and 4.8E-05 mol/L) in the growth medium, and CO2 in air (0.036, 1, and 2%) on the growth, total lipid content (TLC), total lipid production (TLP) and fatty acid (FA) profile of the green alga, Chlorella vulgaris Beij., were investigated, in vitro. Hi-Fe (4.8E-05 mol Fe+3/L) with 2% CO2 provided the best growth for the alga with 460.0 ± 10 mg/L dry biomass, while the culture with lo-Fe (2.4E-05 mol Fe+3/L) and 2% CO2 provided the maximum TLC of 27.0 ± 0.8%. The maximum TLP both obtained from hi-Fe with 1% CO2 and lo-Fe with 2% CO2 at 116.4± 5.4 mg/L. Both of these lipids displayed FA profile suitable for biodiesel production, but the later condition displayed superior fuel property in terms of iodine value, cetane number, and viscosity, satisfying the specifications by both the European (EN 14214) and US (ASTM B100) standards. The study also showed the possibility of manipulating the FA composition in freshwater green alga, Chlorella vulgaris Beij. by varying the concentrations of CO2 in aeration and Fe+3 in the growth medium.

Source or Periodical Title

Journal of Engineering Science and Technology

ISSN

1823-4690

Page

19-30

Document Type

Conference Paper

Physical Description

tables, graphs

Language

English

Subject

Carbon dioxide, Chlorella vulgaris, Fatty acid, Iron, Microalgae

Digital Copy

yes

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