Fed-batch culture of astaxanthin-rich Haematococcus pluvialis by exponential nutrient feeding and stepwise light supplementation

Chang Duk Kang, Se Jong Han, Seung Phill Choi, Sang Jun Sim

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

A fed-batch culture process followed by subsequent photoautotrophic induction was established for the high density culture of astaxanthin-rich Haematococcus pluvialis using a CO2-fed flat type photobioreactor under unsynchronized illumination. Fed-batch culture was performed with an exponential feeding strategy of the growth-limiting nutrients, nitrate and phosphate, concurrently with the stepwise supplementation of light depending on the cell concentration. During the growth phase, a biomass of 1.47 g/L was obtained at a biomass productivity of 0.33 g/L/day. Photoautotrophic induction of the well-grown vegetative cells was performed consecutively by increasing the light intensity to 400 μmol photon/m2/s, while keeping the other conditions in the CO2-fed flat type photobioreactor fixed, yielding an astaxanthin production of 190 mg/L at an astaxanthin productivity of 14 mg/L/day. The proposed sequential photoautotrophic process has high potential as simple and productive process for the production of valuable Haematococcus astaxanthin.

Original languageEnglish
Pages (from-to)133-139
Number of pages7
JournalBioprocess and Biosystems Engineering
Volume33
Issue number1
DOIs
Publication statusPublished - 2010

Keywords

  • Astaxanthin
  • Exponential feeding
  • Fed-batch culture
  • Haematococcus pluvialis
  • Photoautotrophic induction

ASJC Scopus subject areas

  • Biotechnology
  • Bioengineering

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