Controlled fermentation of kimchi using naturally occurring antimicrobial agents

Area of Science:

• Food Science
• Microbiology
• Fermentation Technology

Background:

• Kimchi, a traditional Korean fermented food, faces shelf-life challenges due to continuous fermentation and over-acidification.
• Preventing over-acidification is crucial for the kimchi industry to maintain product quality during distribution and storage.

Purpose of the Study:

• To review methods for extending kimchi shelf life by delaying fermentation using naturally occurring antimicrobial agents.
• To explore the potential of hurdle technologies (multifactor preservative systems) to control kimchi fermentation and minimize undesirable sensory changes.

Main Methods:

• Review of existing research on adding various natural antimicrobial agents to kimchi.
• Analysis of the impact of these agents on fermentation rate and sensory quality.
• Evaluation of hurdle technologies as a strategy for combined antimicrobial effects.

Main Results:

• Addition of natural antimicrobial agents can delay kimchi fermentation but may alter sensory quality if used in high concentrations.
• Hurdle technologies, utilizing combinations of low-level natural agents, offer a promising approach to control fermentation.
• Synergistic or additive effects from combined agents can minimize sensory changes while extending shelf life.

Conclusions:

• Naturally occurring antimicrobial agents can be used to extend the shelf life of kimchi.
• Hurdle technologies are recommended for developing effective preservation strategies for kimchi and other fermented foods.
• Further research into synergistic combinations of natural agents is needed to optimize kimchi's sensory qualities and shelf life.