Chiller Bath Zoning for Meat Decontamination
Solution Overview
Problem
Current methods for disinfecting poultry and meat carcasses in sprays and aqueous baths are inadequate in reducing microbial contamination, as existing antimicrobial strategies can counteract each other when combined, and water reuse contributes to microbial growth and cross-contamination.
Innovation Solution
Creating zones in sprays and chiller baths by dosing a source of alkalinity and peracid into the water, with at least one alkaline zone and one peracid zone, to effectively reduce bacterial loads on meat and poultry by maintaining optimal pH and concentration levels for each zone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If multiple antimicrobial agents are combined in wash water, then microbial contamination is reduced, but the agents may counteract each other
Solution Approach 1:
The processing system is divided into multiple sequential zones, each with a different antimicrobial agent (e.g., chlorine zone, peroxide zone, alkaline zone). This segmentation allows each agent to work effectively without interfering with others, as carcasses move through zones in sequence rather than all agents being present simultaneously.
Solution Approach 2:
Different antimicrobial agents are applied periodically or sequentially as the carcass moves through the washing system. The system uses timed dosing and sequential zone passage to ensure each agent has sufficient contact time to be effective while avoiding simultaneous application that could cause counteraction.
2Loss of substance
If water is reused in processing, then water conservation is improved, but microbial growth and cross-contamination increase
Solution Approach 1:
The washing system is segmented into multiple zones with different chemical compositions and functions. Each zone serves a specific purpose (e.g., pre-rinse, main wash, final rinse) and uses optimized conditions to maximize microbial reduction while minimizing water reuse requirements.
Solution Approach 2:
The system changes key parameters (temperature, pH, chemical concentration) in different zones to optimize microbial control. By adjusting these parameters sequentially, the system maintains high effectiveness in reducing microbial growth while managing water usage efficiency.
3Object-affected harmful factors
If washing time is increased, then microbial reduction is improved, but processing speed decreases
Solution Approach 1:
The washing process is segmented into multiple parallel zones that operate simultaneously. This allows the carcass to be exposed to multiple antimicrobial zones at different locations along the conveyor, effectively reducing total microbial burden without requiring prolonged single-point contact time.
Solution Approach 2:
The system transitions from a single-point washing approach to a multi-zone sequential approach along the processing line. By distributing washing actions across multiple spatial zones, the system achieves comprehensive microbial reduction while maintaining high processing throughput.
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 method significantly reduces bacterial loads on meat and poultry by ensuring the antimicrobial effectiveness of peracids and alkaline solutions, even when combined, thereby improving the microbial quality of the water and reducing cross-contamination risks.
Implementation Method 1
generating a plurality of zones using spray nozzles or within a chiller bath containing water by dosing a source of alkalinity and a peracid into the water, wherein the plurality of zones comprises at least one alkaline zone with pH above pKa of the peracid, and at least one peracid zone with pH below the pKa of the peracid
Data Source
AI summary
A chiller bath includes a tank for holding a volume of chiller water; a dosing system for dosing a first solution and a second solution into the chiller water, arranged to create a plurality of zones within the volume of water, wherein each zone has a higher concentration of either the first or the second solution than surrounding portions of the volume of water; and a meat or poultry immersion arrangement for immersing and moving carcasses in the chiller water. A method for reducing bacterial load on meat or poultry includes generating a plurality of zones within a chiller bath containing water by dosing a source of alkalinity and antimicrobial into the water, wherein the plurality of zones comprises at least one alkaline zone with a pH above 8.5, and at least one antimicrobial zone with pH below 8.5; and submersing meat or poultry in the bath. The zones can also be generated using spray nozzles in a meat or poultry operation.