Extending the storage life of chilled beef: microwave processing

Area of Science:

• Food science and technology
• Microbiology
• Meat science

Background:

• Extending the shelf-life of fresh meat is a significant challenge in the food industry.
• Maintaining the visual appeal of meat post-processing is crucial for consumer acceptance.
• Bacterial contamination is a primary factor limiting meat shelf-life.

Purpose of the Study:

• To evaluate the efficacy of microwave technology in reducing bacterial load on vacuum-packed beef steak.
• To determine if microwave treatment can extend meat shelf-life without compromising fresh appearance.
• To assess the impact of microwave heating on meat juice purging and overall quality.

Main Methods:

• Vacuum-packed beef steaks were subjected to microwave treatment to raise surface temperature.
• Total aerobic and anaerobic bacterial counts were measured before and after treatment.
• Visual assessment of meat appearance and quantification of purged meat juices were performed.

Main Results:

• Microwave treatment demonstrated a reduction in both aerobic and anaerobic bacterial counts.
• The study observed the potential for extended shelf-life due to bacterial reduction.
• Meat appearance and juice purging were monitored to assess product quality post-treatment.

Conclusions:

• Microwave technology shows promise for reducing bacterial load in vacuum-packed beef.
• Further research is needed to optimize parameters for shelf-life extension and quality preservation.
• Maintaining the fresh appearance of microwaved beef requires careful control of treatment conditions.