Utilizing response surface methodology to evaluate the process parameters of indigenous cucumber fermentation

Area of Science:

• Food Science
• Microbiology
• Fermentation Technology

Background:

• Commercial pickled cucumbers utilize high salt (up to 15% NaCl) for preservation, inhibiting beneficial microbial growth.
• High salt content in pickles poses a challenge for maintaining probiotic viability during production and storage.

Purpose of the Study:

• To optimize conditions for naturally fermented cucumber production.
• To maximize the viability of beneficial microorganisms in fermented cucumbers.

Main Methods:

• Utilized Box-Behnken Design (BBD) to optimize salt concentration, fermentation temperature, and brine filling temperature.
• Monitored sugar consumption and total acid production to correlate process parameters.
• Assessed microbial viability using colony-forming units per milliliter (cfu/mL).

Main Results:

• Identified optimal conditions: 5% salt concentration, 70°C brine filling temperature, and 25°C fermentation temperature.
• Achieved microbial viability exceeding 6 log cfu/mL under optimized conditions.
• Demonstrated a significant fit (p < 0.05) to a quadratic model for process optimization.

Conclusions:

• Established optimal parameters for producing fermented cucumbers with high probiotic viability.
• Provides valuable process knowledge for the pickle industry to enhance product quality and health benefits.