Low Atmospheric Pressure Slaughter Reduces Poultry Wing Damage
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Solution Overview
Problem
Current poultry slaughter methods, such as electrical stunning and gas stunning, result in increased stress, spastic wing activity, and meat damage due to inadequate consideration of pressure levels and decompression rates, leading to suboptimal humane treatment and meat quality.
Innovation Solution
A method involving a sealed chamber where pressure is reduced at a continuous rate to a target decompression pressure of 79.58 kPa to 91.43 kPa, with controlled decompression rates and lapse times to minimize spastic wing activity and ensure humane stunning and slaughter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional electrical stunning is used to render birds unconscious, then the birds will not struggle during processing, but the birds experience increased stress and spastic wing activity due to being forced into an upside-down position
Solution Approach 1:
The patent applies parameter changes by transitioning from electrical stunning to controlled atmospheric pressure decomposition. The pressure parameters are precisely controlled (decompression to 79.58-91.43 kPa at specific rates) to induce unconsciousness without the harmful effects of electrical shock and inverted positioning, thereby reducing stress and spastic wing activity while maintaining stunning effectiveness
Solution Approach 2:
The patent replaces the mechanical/electrical stunning system with a pneumatic system using controlled pressure decomposition. This substitution eliminates the need for electrical shocks and physical restraint in inverted positions, achieving unconsciousness through pressure-induced physiological changes instead
2Object-affected harmful factors
If gas stunning is used to render birds unconscious, then the birds may be stunned without electrical shock, but the process requires excessively long exposure times and can cause grand mal seizures indicating extreme pain
Solution Approach 1:
The patent changes the physiological parameter affecting unconsciousness from chemical (gas exposure) to physical (pressure decomposition). By controlling pressure decomposition rate and final pressure levels, the patent achieves rapid unconsciousness within minutes, eliminating both the excessively long exposure times and the grand mal seizures associated with gas stunning
3Productivity
If rapid pressure decomposition is used to quickly render birds unconscious, then the slaughter process is faster, but spastic wing activity increases due to inadequate control of pressure levels and decomposition rates
Solution Approach 1:
The patent applies dynamics by implementing a controlled, continuous pressure decomposition process rather than rapid or static pressure changes. The pressure is decompressed continuously at controlled rates to specific target levels (79.58-91.43 kPa), maintaining dynamic control throughout the process to prevent spastic wing activity while achieving unconsciousness efficiently
Solution Approach 2:
The patent incorporates feedback mechanisms by monitoring pressure levels and decomposition rates, and by observing bird physiological responses. This feedback allows adjustment of the decomposition process to prevent excessive spastic activity while maintaining slaughter efficiency, ensuring pressure parameters remain within the optimal range
4Device complexity
If conventional slaughter methods are used, then the process is simple and quick, but the birds experience extreme stress and the meat quality deteriorates due to broken wings and other damage
Solution Approach 1:
The patent changes the fundamental parameter of the slaughter process from mechanical/electrical to pneumatic (pressure-controlled). This parameter change enables a more humane process that reduces stress and prevents wing damage, thereby improving meat quality while maintaining operational simplicity through automated pressure control systems
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach significantly reduces spastic wing activity and improves meat quality by rendering birds unconscious before death, minimizing stress and wing damage, resulting in a more humane and efficient slaughter process.
Implementation Method 1
the pressure in the chamber is reduced at a continuous rate to a target decompression pressure
Data Source
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AI summary
The present disclosure generally relates to a method for humanely stunning and slaughtering poultry and more particularly to a method for decreasing the spastic wing activity of poultry during slaughter. In particular, the birds are placed into a sealed chamber and the pressure in the chamber is reduced at a continuous rate to a target decompression pressure. The low atmospheric pressure slaughter is more humane than traditional techniques and results in less spastic wing activity.