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A novel double-layered photobioreactor for simultaneous Haematococcus pluvialis cell growth and astaxanthin accumulation

Paper ID Volume ID Publish Year Pages File Format Full-Text
25594 43583 2006 7 PDF Available
Title
A novel double-layered photobioreactor for simultaneous Haematococcus pluvialis cell growth and astaxanthin accumulation
Abstract

This study proposes a novel double-region photobioreactor to simplify the commercial two-stage process of astaxanthin production by the cultivation of Haematococcus pluvialis. The feasibility of the double-region photobioreactor has been investigated and found to achieve high biomass yield in the inner core region and simultaneous astaxanthin accumulation in the outer jacket region. Among many environmental factors, light condition and nitrate level were manipulated for selective cell growth and astaxanthin production. In the outer jacket region, efficient astaxanthin production was accomplished by excessive irradiation (770 ± 20 μE m−2 s−1) and nitrate starvation, resulting in a dramatic increase of astaxanthin productivity (357 mg l−1). Meanwhile, attenuated light energy (40 ± 3 μE m−2 s−1) and sufficient nitrates were supplied to the vegetative cells in the inner core region, which continued to grow to a high cell concentration of 4.0 × 105 cells ml−1. The sequential batch run was performed by utilizing the high-density vegetative cells as inoculum for the next batch run. The cultivation results exhibited similar trends as the previous run, reaching high cell density (4.3 × 105 cells ml−1) in the inner core region and high astaxanthin content (5.79% on a dry weight basis) in the outer jacket region. The present study indicates that the double-region photobioreactor and its method of operation possess a good potential for commercial production of astaxanthin by H. pluvialis.

Keywords
Double-region photobioreactor; Haematococcus pluvialis; Astaxanthin; Inner core region; Outer jacket region
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A novel double-layered photobioreactor for simultaneous Haematococcus pluvialis cell growth and astaxanthin accumulation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Biotechnology - Volume 125, Issue 4, 1 October 2006, Pages 540–546
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