Application of Peroxyacetic Acid Detector in Sterile Cold Filling Line: Precise Concentration Control to Safeguard the 'Sterile' Lifeline

Aseptic cold filling line is a highly automated production system used to fill liquid or semi-liquid products (such as beverages, dairy products, pharmaceuticals, etc.) into pre-sterilized containers in aseptic environment, ensuring that the products are not contaminated by microorganisms throughout the process, thus achieving long-term preservation without preservatives.

In aseptic cold filling lines, peroxyacetic acid (PAA) serves as the cornerstone chemical for maintaining sterile environments, leveraging its broad-spectrum sterilization and rapid decomposition properties. However, both insufficient concentration leading to sterilization failure and excessive concentration causing corrosion or residue risks present challenges. How can we precisely control PAA concentration to achieve dual objectives of effective sterilization and production safety? The PAA detector emerges as the optimal solution to this critical challenge!

This article introduces the application of peracetic acid detector in sterile filling line, and reveals how to build a "firewall" for sterile production through intelligent monitoring technology.

1. Why do we need peracetic acid detector?

The core requirement of aseptic filling line is "zero contamination", and the fluctuation of peracetic acid concentration directly affects the success of sterilization:

Low concentration: incomplete sterilization may lead to microbial contamination, resulting in the risk of batch rejection or even recall.

High concentration: excessive residue affects the flavor of the product, and long-term use accelerates the corrosion of the equipment and increases the maintenance cost.

Manual detection lags: Traditional detection methods are time-consuming and laborious, and cannot meet the real-time control requirements of high-speed production.

The value of peracetic acid detector:

✅ Real-time online monitoring: Instant response with dynamic tracking of peracetic acid concentration changes.

✅ Closed-loop automation: Integrated with the dosing system, it intelligently regulates acetic acid supply.

✅ Full-process data traceability: Record key parameters and optimize processes.

2. Application scenario: Full coverage from "packaging sterilization" to "residue control"

2.1. Real-time monitoring of disinfectant concentration

Online concentration control: In aseptic cold filling processes, peracetic acid is commonly used for sterilizing equipment, pipelines, bottle bodies, and caps. The peracetic acid detector continuously monitors the solution concentration (typically 0.1%-2%), ensuring it remains within the effective sterilization range. Lower concentrations may result in incomplete sterilization, while higher concentrations could cause corrosion or residue risks.

Automatic fluid replacement regulation: It is linked with the drug addition system to automatically adjust the amount of peracetic acid according to the detection results, maintain a stable concentration and reduce manual intervention.

2.2. Sterilization Effect Verification

Surface disinfection validation: During CIP (Clean-in-Place) and SIP (Sterilize-in-Place) processes, peracetic acid detectors are used to verify that the PAA concentration on equipment surfaces (e.g., filling machines, pipelines, valves, etc.) meets the required standards, ensuring thorough sterilization.

Packaging material sterilization monitoring: Monitor the immersion or spray sterilization process of packaging materials such as bottles, caps, and films to ensure that the PAA concentration and time meet the process requirements.

2.3. Residue Testing

Residual control after rinsing: After sterilization, the equipment or packaging materials should be rinsed with sterile water. The peracetic acid detector can monitor the residual amount of PAA in the rinse water to avoid the residual affecting the flavor or safety of the product.

3. Application of the BT6308-Pera Peroxyacetic Acid Detector

Real-time Monitoring and Rapid Response: Sterile cold filling requires real-time monitoring of PAA concentration. The BT6308-Pera Peroxyacetic Acid Detector supports continuous online monitoring and automated dosing control. By automatically adjusting flow rate, pump speed, or valve position, it maintains the peracetic acid concentration at preset values. This automated dosing system reduces reagent costs and enhances process control efficiency.

Wide-range adaptability: The BT6308-Pera peracetic acid detector features a detection range of 0.5-50,000 ppm, meeting all scenario requirements from low-concentration residue detection to high-concentration disinfectant monitoring.

Environmental tolerance: The sensor is made of corrosion-resistant materials (such as stainless steel, PVC) and has built-in automatic temperature compensation. The sensor is a diaphragm type double electrode system, which can automatically adjust the potential to eliminate zero point drift.

The peracetic acid detector serves not only as the 'concentration guardian' for aseptic filling lines but also as the core engine for achieving efficient, safe, and compliant production. Driven by dual forces of consumption upgrades and stricter food safety standards, companies urgently need intelligent detection solutions to strengthen aseptic defenses and seize market opportunities!