Enhancement of microalga Haematococcus pluvialis growth and astaxanthin production by electrical treatment

Jee Young Kim, Changsu Lee, Min Seo Jeon, Jaewon Park, Yoon E. Choi

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)


In this study, we investigated the effects of electrical treatment on Haematococcus pluvialis growth. The slow growth of H. pluvialis is a major limitation for its mass production. We discovered that electrical treatment may promote the growth of H. pluvialis. To evaluate optimal growth-promoting conditions, the algal growth rate was investigated at various voltages. The optimum current was identified as 100 mA (voltage: 25 V). In comparison with the non-treated cells, those subjected to electrical treatment showed a 1.2 fold increase in cell density. Further experiments confirmed the direct impact of electrical treatment on the growth of H. pluvialis. The periodic application of electrical voltage resulted in a significant increase in the dry weight and astaxanthin production. The astaxanthin content in the periodic application of electrical treatment was 32.6 mg/L, which was a 10% increase compared to those in the non-treated controls. This strategy may serve as a novel approach to enhance H. pluvialis growth as well as astaxanthin production.

Original languageEnglish
Pages (from-to)815-819
Number of pages5
JournalBioresource technology
Publication statusPublished - 2018 Nov


  • Astaxanthin
  • Electrical treatment
  • Haematococcus pluvialis
  • Periodical treatment

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal


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