Screening various Yarrowia lipolytica strains for citric acid production

Carsanba E., Papanikolaou S., Fickers P., ERTEN H.

YEAST, vol.36, no.5, pp.319-327, 2019 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 36 Issue: 5
  • Publication Date: 2019
  • Doi Number: 10.1002/yea.3389
  • Journal Name: YEAST
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.319-327
  • Keywords: batch bioreactor culture, C, N molar ratio, citric acid, Yarrowia lipolytica, GLUCOSE, SUBSTRATE, CULTURE, LIPIDS, WHEY
  • Çukurova University Affiliated: Yes

Abstract

Citric acid (CA) productivity by Yarrowia lipolytica dependents on strain type, carbon source, carbon to nitrogen (C/N) molar ratio as well as physicochemical conditions (pH, temperature, oxygen transfer rate, etc.). In the current study, 10 different Y. lipolytica strains were first challenged in shake-flask culture for CA production in a glucose-based media under nitrogen-limited conditions. For the most promising one, strain K57, CA productivity was monitored during culture in batch bioreactor for three initial C/N molar ratio (167, 367, and 567 Cmol/Nmol). The highest CA yield (0.77 g/g glucose), titre (72.3 g/L CA), and productivity (0.04 g/g.h) were found for C/N ratio of 367. However, the highest growth rate was obtained for an initial C/N ratio of 167. From these results, Y. lipolytica strain K57 could be considered to produce CA at higher titre on glucose-based medium in batch bioreactor than others Y. lipolytica strain reported in the literature.