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Title: Statistical optimization of culture media for growth and lipid production of Chlorella protothecoides UTEX 250

Journal Article · · Bioresource Technology
 [1];  [2];  [2]
  1. National Taiwan Univ., Taipei (Taiwan)
  2. Univ. of Arizona, Tucson, AZ (United States)
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The concentration of NaNO3, MgSO47H2O and proteose, in Chlorella protothecoides medium were optimized for algal biomass and lipid production by using response surface methodology with Box-Behnken design. The optimal concentrations were 0.45 g/L of NaNO3, 6 mg/L of MgSO47H2O, and 0.25 g/L of proteose for maximum biomass production and 2 mg/L of MgSO47H2O and no addition of NaNO3 and proteose for lipid accumulation. In optimized biomass production medium, a final biomass concentration of 1.19 g/L was obtained, which was 1.8 times higher than that in the original medium. For lipid accumulation, a 12.9% lipid content was obtained from the biomass in the lipid production medium, which was three times higher than that from the original medium. The fatty acid profile of algae grown in the optimized medium demonstrated a higher unsaturated fatty acid content (i.e. methyl linoleate (C18:2) and methyl linolenate (C18:3)) than that of the algae grown in the original medium. The results provide a strategy for limiting the amount of nutrients required in large scale outdoor cultivation systems of C. protothecoides to make the production of algal biomass more economically attractive.

Research Organization:
Univ. of Arizona, Tucson, AZ (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
DOE Contract Number:
EE0003046
OSTI ID:
1093681
Report Number(s):
DOE-DANF-0003046-Q3; 28308-Q
Journal Information:
Bioresource Technology, Vol. 128; ISSN 0960-8524
Publisher:
Elsevier
Country of Publication:
United States
Language:
English

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Related Subjects

09 BIOMASS FUELS
59 BASIC BIOLOGICAL SCIENCES
Lipid production response surface methodology
medium optimization
autotrophic cultivation