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Combined effects of light intensity and acetate concentration on the growth of unicellular microalga Haematococcus pluvialis

Paper ID Volume ID Publish Year Pages File Format Full-Text
18448 42723 2006 6 PDF Available
Title
Combined effects of light intensity and acetate concentration on the growth of unicellular microalga Haematococcus pluvialis
Abstract

The green microalga Haematococcus pluvialis is known as one of the most useful photosynthetic microorganisms, due to its ability to produce a high value-added antioxidant (astaxanthin). However, this microalga is not easily commercially cultivated because its growth is slow under autotrophic conditions. In this study, the mixotrophic culture conditions were partially optimized using a sequential factorial design. The light intensity and acetate concentration were selected as major factors affecting the algal growth rate. The first factorial design (22) was performed with the light levels of 80–120 μE m−2 s−1 and 40–70 mM acetate. As a result, the optimum conditions were not present within the domain of the first experimental design. An ascent line obtained from the first design showed that the optimum conditions existed within a region of lower concentration of acetate, but similar intensity of light. On the basis of the ascent line, additional experiments were carried out using a central composite design, which enhanced the growth rate up to 0.243 g L−1 day−1 at a light intensity of 170 μE m−2 s−1 and acetate concentration of 30 mM.

Keywords
Light; Acetate; Haematococcus pluvialis; RSM
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Combined effects of light intensity and acetate concentration on the growth of unicellular microalga Haematococcus pluvialis
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Publisher
Database: Elsevier - ScienceDirect
Journal: Enzyme and Microbial Technology - Volume 39, Issue 3, 3 July 2006, Pages 490–495
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