Controlled Atmosphere Poultry Stunning with Carbon Dioxide
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Solution Overview
Problem
Current poultry stunning methods, particularly those using high voltage electricity and gas, are costly, complex, and lead to labor inefficiencies and meat quality degradation due to bird movement and potential injury during processing.
Innovation Solution
A controlled atmosphere stunning system using a sealed chamber where poultry are exposed to a gaseous mixture, such as carbon dioxide, to induce lethargy or unconsciousness, followed by exhaustion of the gas and advancement to processing, minimizing labor strain and meat damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high voltage electricity is used to stun poultry, then the stunning process is rapid and effective, but labor costs increase and worker injuries occur due to bird movement and wing flapping
Solution Approach 1:
The patent replaces the mechanical/electrical stunning system with a gaseous atmosphere system. Instead of using high voltage electricity that causes bird movement and worker injury, the system uses carbon dioxide gas to induce lethargy and unconsciousness, eliminating the need for mechanical handling of moving birds and reducing labor safety risks.
Solution Approach 2:
The patent creates an inert atmosphere by introducing carbon dioxide gas into the stunning chamber, replacing the normal air atmosphere. This inert gas environment causes the birds to become lethargic and unconscious without mechanical contact, solving the problem of bird movement causing worker injuries.
2Productivity
If poultry are handled while fully awake, then processing can begin immediately, but wing breakage and joint damage occur leading to meat quality degradation
Solution Approach 1:
The patent applies preliminary action by stunning the birds before they are handled for processing. The carbon dioxide gas is introduced into the chamber before any mechanical handling occurs, ensuring the birds are already in a lethargic state that prevents wing breakage and joint damage during subsequent processing operations.
Solution Approach 2:
The patent provides beforehand cushioning by creating a protective gaseous environment that prevents mechanical injury before handling occurs. The carbon dioxide atmosphere acts as a cushioning medium that reduces bird movement and prevents wing flapping, thereby preventing damage to wings and joints before any mechanical contact happens.
3Ease of operation
If gas stunning systems are implemented, then bird movement is reduced and labor burden decreases, but system complexity and capital costs increase significantly
Solution Approach 1:
The patent extracts the essential function of gas stunning from complex existing systems. Instead of implementing complete gas stunning systems with multiple components, the invention extracts and uses only carbon dioxide gas in a simple chamber setup, eliminating the need for complex gas delivery systems, multiple gas types, and expensive infrastructure modifications.
Solution Approach 2:
The patent uses inexpensive carbon dioxide gas as a disposable stunning medium. Rather than investing in expensive, complex gas stunning infrastructure, the system uses readily available CO2 gas that can be easily introduced and exhausted, significantly reducing capital costs while maintaining the benefits of reduced bird movement.
4Reliability
If existing gas stunning systems are installed, then poultry can be stunned effectively, but significant disruption and downtime occur during implementation
Solution Approach 1:
The patent extracts the core stunning function from complex existing systems, using only carbon dioxide gas in a simple chamber. This simplified approach can be implemented without disrupting existing processing operations, allowing the chamber to be introduced as a separate module that processes birds during normal operation without requiring major infrastructure changes or extensive downtime.
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 system reduces wing breakage and bruising, improves meat quality, and enhances processing efficiency by minimizing stress on birds, allowing for semi-automated or fully automated chicken handling and increased productivity.
Implementation Method 1
introducing a gaseous mixture to the isolated atmosphere to stun the one or more batches of poultry
Implementation Method 2
an atmosphere re-circulating subsystem adapted to recirculate the isolated atmosphere within the stunning chamber
Implementation Method 3
an exhaust subsystem adapted to evacuate the carbon dioxide from the stunning chamber
Data Source
AI summary
System and method for controlled atmosphere stunning of chickens or turkeys in a batch mode is provided. The disclosed method includes the steps of: loading one or more batches of chickens or turkeys in a stunning chamber and sealably enclosing the stunning chamber to isolate the atmosphere therein. Carbon dioxide is then introduced to the isolated atmosphere in a series of three, four, five or more phases to humanely stun and eventually kill the poultry. The carbon dioxide containing atmosphere is subsequently forcibly exhausted from the stunning chamber and the ranks of cages or modules containing the stunned poultry are advanced to a subsequent processing station such as a tipper or dumping station.