Microwave drying of fish, chicken and beef samples

Area of Science:

• Food Science
• Materials Science
• Chemical Engineering

Background:

• Microwave drying offers a rapid method for processing food products.
• Understanding the drying kinetics and energy consumption is crucial for optimizing food preservation.
• Meat products like fish, chicken, and beef require specific drying strategies due to their varying compositions.

Purpose of the Study:

• To investigate the drying characteristics of fish, chicken, and beef using microwave drying.
• To determine the optimal microwave power levels for efficient drying.
• To evaluate the suitability of various drying models and analyze energy consumption.

Main Methods:

• Samples of fish, chicken, and beef were dried at four different microwave power levels (90, 180, 270, 360 W).
• Experimental data were fitted to seven established drying models to identify the best fit.
• Effective moisture diffusion coefficients, activation energies, and energy consumption were calculated.

Main Results:

• Drying time significantly decreased with increasing microwave power for all meat types.
• Fish samples dried faster than chicken and beef.
• The logarithmic and Midilli et al. models accurately represented the microwave drying behavior of meat samples.
• Effective moisture diffusion coefficients ranged from 1.74 × 10⁻⁷ to 16.4 × 10⁻⁷ m²/s.
• Activation energies varied for each meat type, with chicken, fish, and beef showing 14.59, 79.147, and 140.81 W/g, respectively.
• Energy consumption was highest for chicken at 90 W (0.045 kWh) and lowest for fish at 360 W (0.018 kWh).
• Microwave power level was the primary factor influencing color change (ΔE), with chicken experiencing the most significant change and fish the least.

Conclusions:

• Microwave power is a critical parameter influencing the drying rate and energy efficiency of meat products.
• The choice of drying model is essential for accurately predicting and optimizing the microwave drying process.
• Higher microwave power levels lead to faster drying but can impact color stability, necessitating a balance for optimal results.