Foaming process optimization, drying kinetics and quality of foam mat dried papaya pulp

Area of Science:

• Food Science and Technology
• Drying Technology
• Powder Production

Background:

• Papaya pulp processing requires efficient methods for powder production.
• Foaming techniques can alter drying kinetics and product quality.
• Optimizing foaming parameters is crucial for desirable powder characteristics.

Purpose of the Study:

• To optimize the papaya pulp foaming process using egg white and xanthan gum.
• To evaluate the impact of drying conditions on drying kinetics and powder quality.
• To determine the effectiveness of foam mat drying for papaya powder production.

Main Methods:

• One-factor-at-a-time and 2^k full factorial design for foaming optimization.
• Varied egg white (5-20%), xanthan gum (0-0.5%), and whipping time (5-20 min).
• Foamed and non-foamed pulps dried at 60°C and 80°C at different layer thicknesses.

Main Results:

• Optimal foaming conditions (15% egg white, 0.3% xanthan gum, 15 min whipping) yielded 275.64% foam expansion.
• Foaming reduced drying times by 50-70% across temperatures and thicknesses.
• Foamed powders exhibited lower dissolution times, hygroscopicity, and lighter reconstituted solutions.

Conclusions:

• Foam mat drying is a highly effective method for producing high-quality papaya powder.
• Optimized foaming parameters enhance drying efficiency and product attributes.
• Further research can explore ascorbic acid retention and phenolic compound stability during drying.