Modeling and optimization of red currants vacuum drying process by response surface methodology (RSM).

Area of Science:

• Food Science and Technology
• Agricultural Engineering

Background:

• Red currants are rich in bioactive compounds and antioxidants.
• Effective drying methods are crucial for preserving fruit quality and extending shelf life.

Purpose of the Study:

• To optimize vacuum drying conditions for red currants.
• To evaluate the impact of drying on physical and chemical properties.

Main Methods:

• Box-Behnken experimental design and response surface methodology were employed.
• Optimized temperature, pressure, and drying time.
• Analyzed moisture content, water activity, color, firmness, rehydration, phenolic content, flavonoid content, anthocyanins, ascorbic acid, and antioxidant activity.

Main Results:

• Optimal vacuum drying conditions determined: 70.2 °C, 39 mbar, and 8 hours.
• Vacuum drying maintained good physico-chemical properties.
• Results were comparable to lyophilization and superior to conventional drying.

Conclusions:

• Vacuum drying is an effective method for preserving red currant quality.
• Optimized parameters ensure high retention of beneficial compounds and physical attributes.
• This method offers a viable alternative to freeze-drying and conventional drying techniques.