Characterization of the thermal-tolerant mutants of Chlorella sp. with high growth rate and application in outdoor photobioreactor cultivation

Seow Chin Ong, Chien Ya Kao, Sheng Yi Chiu, Ming Ta Tsai, Chih-Sheng Lin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

62 Scopus citations

Abstract

In this study, two thermal-tolerant mutants of Chlorella sp. MT-7 and MT-15, were isolated. In indoor cultivation, specific growth rate (μ, d-1) of the mutants were 1.4 to 1.8-fold at 25 °C and 3.3 to 6.7-fold at 40 °C higher than those of wild type. The carbon dioxide fixation rate of both microalgal mutants was also significantly higher than that of wild type. In outdoor closed cultivation, where the temperature of culture broth was 41 ± 1 °C, the μ of mutant strain MT-15 was 0.238 d-1 during an 8-day cultivation. Whereas, the growth of wild type was inhibited in the outdoor cultivation. Our results show that the isolated microalgal strains are adaptable to be applied in outdoor cultivation in subtropical zones.

Original languageEnglish
Pages (from-to)2880-2883
Number of pages4
JournalBioresource Technology
Volume101
Issue number8
DOIs
StatePublished - 1 Apr 2010

Keywords

  • Carbon dioxide
  • Chlorella sp.
  • Growth
  • Microalgae
  • Thermal-tolerant mutant

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