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Astaxanthin biosynthesis from simultaneous N and P uptake by the green alga Haematococcus pluvialis in primary-treated wastewater

Paper ID Volume ID Publish Year Pages File Format Full-Text
4822 248 2006 5 PDF Available
Title
Astaxanthin biosynthesis from simultaneous N and P uptake by the green alga Haematococcus pluvialis in primary-treated wastewater
Abstract

An alternative microalgal system for biological wastewater treatment is proposed for both the removal of nitrogen and phosphorus from wastewater and the production of a valuable carotenoid, astaxanthin. The system consists of sequential photoautotrophic cultivation and induction processes using the green alga Haematococcus pluvialis. The Haematococcus process was applied to primary-treated sewage (PTS) and primary-treated piggery wastewater (PTP) with serial dilution. H. pluvialis grew well on PTS and PTP diluted four-fold, resulting in the successful removal of nitrogen and phosphorus from both wastewaters. At that time, cell growth rates were comparable to those in the algal-defined NIES-C medium. Following the cultivation stage, N-deprived vegetative cells were transformed under photoautotrophic induction by continuous feeding of both CO2-mixed gas and intense light to red aplanospores with substantial astaxanthin contents. The resulting astaxanthin contents accounted for about 5.1 and 5.9% of the total biomass of the PTS and PTP cultures, respectively. Our results indicate the potential of the proposed Haematococcus process as a subsidiary wastewater treatment technology with the capability of biosynthesizing the high-value antioxidant astaxanthin.

Keywords
Wastewater treatment; Haematococcus pluvialis; Astaxanthin; Photoautotrophic induction; Carotenoid production; Microalgae
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Astaxanthin biosynthesis from simultaneous N and P uptake by the green alga Haematococcus pluvialis in primary-treated wastewater
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 31, Issue 3, 1 October 2006, Pages 234–238
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