Low Atmospheric Pressure Poultry Stunning System
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Solution Overview
Problem
Current poultry stunning and slaughter methods, such as electrical stunning and gas stunning, cause significant stress and pain to birds, leading to reduced meat quality and increased suffering, while existing pressure-based methods do not consider animal behavior, physiology, or hormonal responses effectively.
Innovation Solution
A low atmospheric pressure system where poultry are placed in a sealed chamber and the pressure is reduced at a continuous rate to a target decompression pressure, maintaining it until death, resulting in unconsciousness and rapid death, thereby reducing stress and improving meat quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrical stunning is used to stun poultry, then the birds are rendered unconscious reliably, but the birds experience increased stress and pain during shackling and stunning, leading to elevated blood corticosterone levels and reduced meat quality
Solution Approach 1:
The patent replaces the electrical stunning system with a pressure-based system. Instead of using electrical shock to render birds unconscious, the invention uses rapid decompression of a sealed chamber to achieve unconsciousness and death. This substitution eliminates the need for shackling and electrical contact, thereby removing the sources of stress and pain while maintaining reliable stunning效果
Solution Approach 2:
The patent creates a controlled sealed chamber environment that isolates the birds from external stressors. The chamber provides a contained space where pressure changes can be applied uniformly, creating a controlled inert environment that eliminates the harmful effects of handling, shackling, and electrical contact while achieving the desired stunning outcome
2Reliability
If gas stunning is used to stun poultry, then the birds are rendered unconscious, but the process requires excessively long exposure times and can cause grand mal seizures suggestive of extreme pain
Solution Approach 1:
The patent replaces the chemical gas stunning system with a physical pressure-based system. Instead of relying on gas diffusion and chemical effects that require prolonged exposure, the invention uses rapid pressure decompression that acts immediately on the birds' physiology, achieving unconsciousness in a fraction of the time required for gas stunning
Solution Approach 2:
The patent employs rapid decompression to quickly transition the birds from conscious to unconscious state. The pressure drop is applied swiftly rather than gradually, rushing through the transition period that would otherwise require long gas exposure. This rapid action achieves the stunning effect before pain or seizures can occur, eliminating the time penalty associated with gas stunning
3Productivity
If traditional slaughter methods are used, then the birds are killed efficiently, but the birds struggle and break wings during processing, reducing meat value and increasing suffering
Solution Approach 1:
The patent merges the stunning and slaughter functions into a single integrated pressure-based process. Instead of separate steps for stunning and killing that require handling and positioning, the invention combines both outcomes into one rapid decompression event. This merging eliminates the handling steps that cause wing breaking and physical damage while maintaining slaughter efficiency
Solution Approach 2:
The patent applies pressure decompression as a preliminary action that simultaneously achieves both stunning and slaughter. The rapid pressure drop precedes any handling or processing steps, rendering the birds unconscious and killing them before any physical manipulation occurs. This preliminary action prevents subsequent handling from causing wing breaks or other damage
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
The method achieves a 90% reduction in brain wave activity before death, minimizing awareness of impending death, reducing blood corticosterone levels, and improving meat tenderness and quality by stabilizing tissue pH and reducing oxygen concentration.
Implementation Method 1
the pressure in the chamber is reduced at a continuous rate to a target decompression pressure and maintained at the decompression pressure until a state of death is obtained
Data Source
Figure 1A~1B
AI summary
The present disclosure generally relates to a method for humanely stunning and slaughtering poultry, and more particularly to a method for stunning and slaughtering poultry using a low atmospheric pressure system. 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 and maintained at the decompression pressure for a period of time until a state of death is obtained. The low atmospheric pressure slaughter is more humane than traditional slaughter techniques and results in excellent meat quality.