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A laboratory study of producing docosahexaenoic acid from biodiesel-waste glycerol by microalgal fermentation

Paper ID Volume ID Publish Year Pages File Format Full-Text
35719 45103 2007 9 PDF Available
Title
A laboratory study of producing docosahexaenoic acid from biodiesel-waste glycerol by microalgal fermentation
Abstract

Crude glycerol is the primary by-product in the biodiesel industry, which is too costly to be purified into to higher quality products used in the health and cosmetics industries. This work investigated the potential of using the crude glycerol to produce docosahexaenoic acid (DHA, 22:6 n-3) through fermentation of the microalga Schizochytrium limacinum. The results showed that crude glycerol supported alga growth and DHA production, with 75–100 g/L concentration being the optimal range. Among other medium and environmental factors influencing DHA production, temperature, trace metal (PI) solution concentration, ammonium acetate, and NH4Cl had significant effects (P < 0.1). Their optimal values were determined 30 mL/L of PI, 0.04 g/L of NH4Cl, 1.0 g/L of ammonium acetate, and 19.2 °C. A highest DHA yield of 4.91 g/L with 22.1 g/L cell dry weight was obtained. The results suggested that biodiesel-derived crude glycerol is a promising feedstock for production of DHA from heterotrophic algal culture.

Keywords
Biodiesel; Crude glycerol; Docosahexaenoic acid; Algal fermentation
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A laboratory study of producing docosahexaenoic acid from biodiesel-waste glycerol by microalgal fermentation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 42, Issue 11, November 2007, Pages 1537–1545
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us