Optimization of erythritol production by Candida magnoliae in fed-batch culture

Y. W. Ryu, C. Y. Park, J. B. Park, S. Y. Kim, J. H. Seo

Research output: Contribution to journalArticlepeer-review

54 Scopus citations

Abstract

A two-stage fed-batch process was designed to enhance erythritol productivity by the mutant strain of Candida magnoliae. The first stage (or growth stage) was performed in the fed-batch mode where the growth medium was fed when the pH of the culture broth dropped below 4.5. The second stage (or production stage) was started with addition of glucose powder into the culture broth when the cell mass reached about 75 g dry cell weight l-1. When the initial glucose concentration was adjusted to 400 g l-1 in the production stage, 2.8 g l-1 h-1 of overall erythritol productivity and 41% of erythritol conversion yield were achieved, which represented a fivefold increase in erythritol productivity compared with the simple batch fermentation process. A high glucose concentration in the production phase resulted in formation of organic acids including citrate and butyrate. An increase in dissolved oxygen level caused formation of gluconic acid instead of citric acid.

Original languageEnglish
Pages (from-to)100-103
Number of pages4
JournalJournal of Industrial Microbiology and Biotechnology
Volume25
Issue number2
DOIs
StatePublished - 2000

Keywords

  • Candida magnoliae
  • Erythritol
  • Fed-batch culture

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