Problems associated with commercial lamb washing in Ireland

Area of Science:

• Food Science
• Meat Processing Technology
• Microbiology

Background:

• Effective cleaning of lamb carcasses is crucial for food safety and shelf-life.
• Traditional and novel carcass cleaning methods require evaluation for commercial viability.
• Irish export factories face challenges in optimizing lamb carcass hygiene.

Purpose of the Study:

• To compare the efficacy of three different lamb carcass cleaning methods.
• To assess the bacteriological impact and shelf-life implications of each cleaning technique.
• To determine the practicality of novel cleaning methods in a commercial setting.

Main Methods:

• Comparison of three cleaning techniques: high-pressure hot water spray (MRI), pneumatic gun spray, and manual brushing.
• Bacteriological analysis of carcasses post-cleaning.
• Assessment of carcass shelf-life under factory conditions.

Main Results:

• The MRI method demonstrated a slight bacteriological advantage over brushing.
• No significant difference in ultimate carcass shelf-life (8 days) was observed between methods.
• All methods yielded visually clean carcasses with good bloom.

Conclusions:

• While MRI showed minor bacteriological benefits, it did not extend shelf-life.
• Spray washing methods (MRI and pneumatic gun) were found to be too slow for practical commercial application.
• Manual brushing remains a viable, albeit less bacterially effective, option for lamb carcass cleaning.