Integrated Viral Filtration and SPTFF System for Biologics Processing
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Solution Overview
Problem
Conventional biologics manufacturing processes face challenges in achieving consistent purity and minimizing viral breakthrough, particularly due to the decoupled and sequential nature of viral filtration (VRF) and ultrafiltration/diafiltration (UF/DF) systems, which require significant space and time, and are prone to viral contamination risks.
Innovation Solution
An integrated, single-use system combining viral filtration with single-pass tangential flow filtration (SPTFF) and diafiltration (DF) for continuous processing of biologic products, allowing for simultaneous viral removal, concentration, and buffer exchange in a compact format, reducing processing time by up to 50% and minimizing viral breakthrough.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional decoupled VRF and UF/DF systems are used sequentially, then viral filtration and concentration can be performed with large equipment, but processing time is extended and space requirements increase
Solution Approach 1:
The patent combines viral reduction filtration (VRF) and ultrafiltration/diafiltration (UF/DF) into a single integrated continuous processing system. The system uses a first semi-permeable membrane for viral reduction and a second semi-permeable membrane for ultrafiltration and diafiltration, allowing both functions to occur simultaneously in one continuous process rather than sequentially in separate systems.
Solution Approach 2:
The system operates continuously with feed stream constantly flowing through both membrane stages. The integrated design eliminates idle time between VRF and UF/DF operations, maintaining continuous viral filtration and concentration throughout the process, thereby reducing total processing time while maintaining reliability.
2Reliability
If conventional decoupled VRF and UF/DF systems are used, then each operation can be optimized independently, but significant space and large equipment are required
Solution Approach 1:
The patent merges VRF and UF/DF into a single integrated system where both membrane operations occur in one continuous flow path. This consolidation reduces the total equipment footprint and space requirements compared to having separate VRF and UF/DF systems, while maintaining the ability to optimize each membrane stage independently through controlled parameters.
Solution Approach 2:
The integrated system performs multiple functions (viral reduction, concentration, and buffer exchange) in a single processing train. The continuous operation allows the system to achieve multi-functionality without requiring separate dedicated equipment for each operation, thereby reducing overall space requirements.
3Productivity
If periodic/continuous filtration is used to reduce process time, then processing speed increases, but viral breakthrough risk increases
Solution Approach 1:
The system maintains continuous viral filtration throughout the entire processing operation. The feed stream constantly passes through the first semi-permeable membrane, ensuring uninterrupted viral removal. This continuous action maintains high productivity while preventing viral breakthrough by eliminating periods where filtration is not active.
Solution Approach 2:
By integrating viral reduction and ultrafiltration in one continuous system, the patent ensures that viral filtration occurs simultaneously with concentration operations rather than periodically. This merging of functions maintains constant viral removal capacity, reducing breakthrough risk while sustaining high processing speed.
4Productivity
If integrated continuous processing is implemented, then processing time is reduced and concentration increased, but system complexity increases
Solution Approach 1:
The patent integrates VRF and UF/DF into one continuous processing system with two semi-permeable membranes arranged in series. This merging achieves high productivity by eliminating idle time and enabling simultaneous viral removal and concentration, while the modular membrane design keeps operational complexity manageable through standardized components.
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
The system achieves rapid and efficient processing of biologic products, reducing processing time by approximately 50% and increasing concentration ten-fold, while ensuring high purity and minimizing viral contamination risks, thus addressing the limitations of traditional methods.
Implementation Method 1
filtering the feed stream to remove viral contaminants
Implementation Method 2
single-pass tangential flow filtration (SPTFF) for product concentration
Implementation Method 3
diafiltration (DF) unit operation for buffer exchange
Data Source
AI summary
A method and system for integrated and continuous viral filtration and biological product concentration, including an initial purification system coupled to a final purification system. The initial purification system includes a viral reduction filtration (VRF) skid, while the final purification system includes a single-pass tangential filtration-diafiltration (SPTFF-DF) skid.