Segmented Food Processing Rooms with Air Pressure Control
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Solution Overview
Problem
The challenge lies in preventing the contamination of processed foods by less common bacteria like Listeria monocytogenes, which can thrive in refrigerated conditions and evade competition from more common bacteria, leading to potential food safety issues and difficulties in tracing and recalling adulterated products in food processing facilities.
Innovation Solution
The solution involves creating separate food processing rooms with controlled air pressure, ventilation systems, and strict personnel and equipment sanitation protocols to minimize the migration of pathogens, along with dedicated maintenance and packaging procedures to ensure the integrity of processed foods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple food processing devices and packaging machines are placed in a single food processing room, then space utilization and productivity are improved, but the risk of pathogen contamination and spread increases
Solution Approach 1:
The patent divides the food processing facility into multiple separate processing rooms, each housing specific food processing devices and packaging machines. This segmentation isolates potential pathogen sources to individual rooms, preventing cross-contamination while maintaining high productivity through coordinated operations across multiple specialized rooms.
2Ease of operation
If personnel move freely between multiple machines and rooms, then operational flexibility and ease of operation are improved, but the likelihood of pathogen migration increases
Solution Approach 1:
The patent implements different access control levels for different processing rooms based on their contamination risk profiles. Critical rooms handling ready-to-eat products have stricter access controls and sanitation requirements, while less critical areas allow greater personnel freedom. This localized quality control maintains operational flexibility while preventing pathogen migration to high-risk areas.
3Device complexity
If a single food processing room is used for multiple devices, then facility complexity and construction cost are reduced, but the ability to trace and recall contaminated products is diminished
Solution Approach 1:
The patent assigns unique identifiers to each processing room and tracks which products are processed in each room. This segmentation enables precise traceability of contaminated products to specific rooms and devices, facilitating targeted recalls rather than facility-wide recalls, thereby maintaining product traceability while managing facility complexity through systematic organization.
4Reliability
If refrigeration is used to control common bacteria, then food safety for typical pathogens is improved, but Listeria and other refrigeration-tolerant pathogens can proliferate
Solution Approach 1:
The patent introduces additional control measures as intermediaries between refrigeration and pathogen control. These include separate processing environments for different product types, enhanced sanitation protocols specifically targeting Listeria, and monitoring systems that detect early signs of Listeria proliferation. These intermediary controls work alongside refrigeration to provide comprehensive protection against both common and refrigeration-tolerant pathogens.
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 effectively reduces the risk of contamination by isolating potential sources of pathogens, allowing for targeted recall and sanitation of contaminated products, thereby enhancing food safety and reducing the risk of adulteration in food processing facilities.
Implementation Method 1
draws all initial and make-up air supplied to a particular VAC system from outside the food processing facility containing the individual food processing rooms through a filter
Implementation Method 2
supply the filtered air to the individual food processing rooms at a velocity and in an amount sufficient to create higher air pressure regions within the individual food processing rooms than in the adjacent areas
Data Source
AI summary
Some food pathogens are not well controlled by lethality treatments followed by refrigeration. A food processing facility according to this invention reduces the likelihood that food pathogens will be able to enter the food processing facility, or spread should they be able to enter. The food processing facility is divided into a plurality of area, with different areas having different allowed actions that can be taken on the food product, different rules and/or procedures for persons who are allowed entry, and/or different levels of cleanliness. The food processing facility includes a plurality of separate rooms for processing the food product, each including separate food processing machines, air handling systems, drain systems and/or often-used supplies and tools. Different air pressures within different areas limit the possible movement of airborne food pathogens. Sanitizing stations are placed between various ones of the different areas.