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

36 Citations (Scopus)

Abstract

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
Volume268
DOIs
Publication statusPublished - 2018 Nov

Bibliographical note

Funding Information:
This research was supported by Academic Research Program funded by Astabio Co., Ltd. (Jeonju, Korea) and the National Research Foundation (NRF) grant funded by the Korea government (2016R1D1A1B03932773). This work was supported by the Marine Biotechnology Program of the Korea Institute of Marine Science and Technology Program (KIMST) funded by the Ministry of Oceans and Fisheries (MOF) of Korea (No. 20170488 ). This work was also supported by the International Young Scientists Research Grant (31750110453) funded by the National Natural Science Foundation of China (NSFC).

Publisher Copyright:
© 2018 Elsevier Ltd

Keywords

  • 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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