Development of a post-processing method to reduce the unique off-flavor of Allomyrina dichotoma: Yeast fermentation

Jungyeon Kim, Ha Eun Lee, Yeojin Kim, Jungwoo Yang, Sung Joon Lee, Young Hoon Jung

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

Allomyrina dichotoma larva is an edible insect that has been consumed in East Asia for centuries. A. dichotoma is suitable for insect farming due to its numerous health benefits and advantages in industrial production. However, its market share is very poor due to their unique off-flavor, which negatively affects consumer preferences. So far, only one study has reported an effective method for reducing the unique off-flavor of A. dichotoma larvae. In this study, to reduce the off-flavor without increasing larval mortality, we inoculated Saccharomyces cerevisiae W-3, which is a wine fermentation yeast strain, in processed larva powder and investigated changes in volatiles. In the fermented larva powder, the intensity of indole, which has a strong fecal odor, decreased to 1/12. In addition, fruit-flavored volatiles such as ethyl acetate, isopentyl acetate, and 2-butanone increased by 17, 13, and 4 times, respectively. To provide clues for understanding the mechanisms by which volatiles change, we performed network analyses. Our yeast fermentation method can be used as a post process to reduce the off-flavor and improve the overall flavor of A. dichotoma larvae.

Original languageEnglish
Article number111940
JournalLWT
Volume150
DOIs
Publication statusPublished - 2021 Oct

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by Korea government (Ministry of Science and ICT, MSIT; No. 2020R1C1C1005251). This work was performed at the Research center for Ildong Bioscience and at the School of Food Science and Biotechnology in Kyungpook National University. We thank to Hye Jee Kang for finalizing this manuscript.

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by Korea government ( Ministry of Science and ICT , MSIT; No. 2020R1C1C1005251 ). This work was performed at the Research center for Ildong Bioscience and at the School of Food Science and Biotechnology in Kyungpook National University. We thank to Hye Jee Kang for finalizing this manuscript.

Publisher Copyright:
© 2021 Elsevier Ltd

Keywords

  • Allomyrina dichotoma
  • Edible insects
  • HS-SPME/GC-MS
  • Off-flavor
  • Yeast fermentation

ASJC Scopus subject areas

  • Food Science

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