Sterility Verification via pH-Adjusted Culture Medium
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Solution Overview
Problem
Current sterile filling systems face challenges in accurately assessing the initial bacterial contamination of containers and caps, leading to potential bacterial propagation in finished products, which necessitates increased disinfectant usage and higher costs due to the use of neutral culture media that are not specific to the content being filled.
Innovation Solution
A method involving a content filling system that uses a culture medium with adjusted pH and composition matching the characteristics of the content, allowing for the verification of bacterial survival or propagation in containers and caps without sterilization, thereby reducing costs and optimizing disinfectant usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If neutral culture medium is used to detect all bacteria, then measurement precision is improved, but cost increases due to excessive facilities, medicines, and energy requirements
Solution Approach 1:
The patent applies local quality by matching the culture medium's pH to the specific content being filled. Instead of using a universal neutral pH culture medium for all contents, the system adjusts the culture medium's pH to match each content type (acidic, neutral, or alkaline), creating a localized optimal environment for detecting bacteria relevant to that specific content.
Solution Approach 2:
The patent implements parameter changes by modifying the pH parameter of the culture medium based on the content characteristics. The system changes the culture medium's pH parameter to match the content's pH, thereby optimizing bacterial detection for each specific content type while reducing unnecessary detection capabilities and associated costs.
2Reliability
If sterilization is performed on containers before filling, then reliability is improved, but initial bacterial contamination assessment becomes difficult
Solution Approach 1:
The patent applies preliminary action by performing a test fill with culture medium before actual production sterilization. This preliminary step allows assessment of initial bacterial contamination on containers and caps without affecting the final sterility assurance, as the test containers are discarded after evaluation.
Solution Approach 2:
The patent uses culture medium as an intermediary substance to detect initial bacterial contamination. The culture medium serves as a mediator that reveals the presence of bacteria on containers and caps, allowing quality assessment without compromising the sterility requirements of the actual filling process.
3Reliability
If increased disinfectant amount is used to prevent bacterial propagation, then reliability is improved, but loss of substance and energy increase
Solution Approach 1:
The patent implements feedback by using the initial bacterial contamination assessment results to adjust disinfectant usage. The system measures the actual bacterial load on containers and caps, then provides feedback to optimize the disinfectant amount required, avoiding both under-disinfection and excessive disinfectant usage.
Solution Approach 2:
The patent applies partial action by using the minimum necessary disinfectant amount based on measured bacterial contamination levels. Instead of applying excessive disinfectant to all containers uniformly, the system adjusts disinfectant application based on the actual contamination risk identified through culture medium testing.
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 allows for accurate assessment of initial bacterial contamination, reducing the need for excessive disinfectants and energy while ensuring the sterility of the filling system, thereby minimizing production costs and maintaining product quality.
Implementation Method 1
a culture medium with adjusted pH and composition matching the characteristics of the content
Data Source
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AI summary
The present invention relates to sterility verification methods for verifying sterility of a container or a cap with use of a content filling system.