Peracetic Acid Concentration Control via Real-Time Feedback
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Solution Overview
Problem
Maintaining appropriate concentrations of peracetic acid (PAA) in food processing systems is challenging due to changing microbiological loads, leading to potential microbial contamination and safety concerns in protein food products.
Innovation Solution
A real-time monitoring system using a PAA probe to measure concentrations and control the addition of PAA through a dosing/metering pump system, ensuring PAA levels remain within a tight concentration range by adjusting with water or concentrated PAA as needed, in both live stream and static storage tank applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If peracetic acid is added in excess to maintain appropriate concentrations, then microbial control is improved, but concentration control precision deteriorates due to equilibrium variations
Solution Approach 1:
The system continuously monitors PAA concentration using a probe and automatically adjusts dosing based on real-time measurements. The controller receives feedback from the probe and modulates the dosing pump to maintain concentration within the target range, resolving the contradiction between maintaining reliable microbial control and achieving precise concentration control.
Solution Approach 2:
The system self-regulates by automatically detecting concentration deviations and correcting them through automated dosing adjustments. The monitoring and control system operates autonomously to maintain optimal PAA levels without manual intervention, ensuring both reliable microbial control and precise concentration management.
2Stability of the object's composition
If continuous monitoring and dosing is implemented, then concentration stability is improved, but system complexity increases
Solution Approach 1:
The controller serves multiple functions: it receives signals from the PAA probe, processes concentration data, controls the dosing pump, and maintains concentration within target ranges. This multi-functionality reduces the need for separate dedicated components, achieving concentration stability while limiting complexity growth.
Solution Approach 2:
The controller acts as an intermediary between the monitoring probe and the dosing pump, coordinating their operations to maintain concentration stability. This centralized control mechanism simplifies the overall system architecture compared to distributed control approaches.
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 system maintains consistent PAA concentrations, reducing microbial activity and ensuring food safety by minimizing variations and maintaining desired levels, even during offline operations.
Implementation Method 1
PAA, which is also sometimes called peracetic acid or peroxyacetic acid, is a peroxycarboxylic acid and is a well known chemical for its strong oxidizing potential
Data Source
AI summary
A system and related methods for monitoring and dosing peroxycarboxylic acids, particularly peracetic acid, in food processing applications based upon desired concentration of the processing solution. The concentration of the peroxycarboxylic acid measured and additional peroxycarboxylic acid being added to the processing solution if the measured concentration is below a threshold level of the desired concentration, and additional water being added to the processing solution if the measured concentration is above a threshold level of the desired concentration. The system and related methods capable of being used in utilized with either live stream or static, storage tank based systems, to keep the concentration of peroxycarboxylic acid at or near desired concentration levels while experiencing less variation than experienced with conventional flow-based or hand-mixed systems.