Development of large-scale and economic pH control system for outdoor cultivation of microalgae Haematococcus pluvialis using industrial flue gas

Yoon Young Choi, Jae Min Joun, Jeewon Lee, Min Eui Hong, Hoang Minh Pham, Won Seok Chang, Sang Jun Sim

Research output: Contribution to journalArticle

19 Citations (Scopus)


The aim of this study was to develop the economic and effective buffer system for microalgae mass cultivation using industrial flue gas. Due to the continuous flue gas supplement, culture media acidified, therefore cell growth inhibited. Although buffering agent was added, this result increase in cost for overall culture process. Therefore combined buffer system of bicarbonate and phosphate (BP) for large-scale use was investigated. The bicarbonate buffer system generated from CO2 dissolution, additionally phosphate buffer system improves the buffer performance under the continuous CO2 supplementation from flue gas. The microalgae Haematococcus pluvialis was cultivated under autotrophic outdoor conditions using these buffer solutions. As a result, the autotrophic BP buffer system enhanced the biomass and astaxanthin productivity of H. pluvialis to 105% and 103%, respectively. The results confirm that the BP buffer system reduces the cost of microalgal CO2 conversion process, particularly for the outdoor mass cultivation.

Original languageEnglish
JournalBioresource Technology
Publication statusAccepted/In press - 2017 Mar 20



  • Astaxanthin
  • Autotrophic buffer system
  • Flue gas
  • Haematococcus pluvialis
  • Polymeric thin-film photobioreactor

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Waste Management and Disposal

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