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논문검색

High-density cultivation of the docosahexaenoic acid-rich microalga, Aurantiochytrium sp. KRS101 using the organic waste from the brewery industry

초록

영어

In the present study, spent yeast from a brewery was used as the growth substrate for the docosahexaenoic acid (DHA)-rich microalga, Aurantiochytrium sp. KRS101. A significant biomass yield (6.69 g/l/d) was obtained using only spent yeast as the growth substrate, with simple stirring as pretreatment. Maximization of nutrient utilization through the use of stepwise cultivation increased the yield to 31.8 g/l of biomass. DHA constituted 38.2% (w/w) of the total fatty acids, and the highest DHA productivity was observed when the C/N ratio was 20:1 (w/w). Spent yeast thus served as a good growth substrate for the production of DHA. Economic assessment revealed that stepwise cultivation using spent yeast as either the sole growth substrate or as a nutrient source could substantially reduce the production cost of microalgal DHA. (This work was supported by the Advanced Biomass R&D Center (ABC) of Global Frontier Project funded by the Ministry of Education, Science and Technology. ABC-2010-0029728)

저자정보

  • Byung-Gon Ryu Environmental and Energy Program, KAIST
  • Kyochan Kim Department of Chemical and Biomolecular Engineering, KAIST
  • Jungmin Kim Department of Chemical and Biomolecular Engineering, KAIST
  • Min S. Park Department of Chemical and Biomolecular Engineering, KAIST, Advanced Biomass R&D Center, KAIST
  • Jong-In Han Department of Civiland Environmental Engineering, KAIST
  • Ji-Won Yang Department of Chemical and Biomolecular Engineering, KAIST, Advanced Biomass R&D Center, KAIST

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