Twin-Column Chromatography with Single Detector Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Capture chromatography in biopharmaceutical production faces inefficiencies due to high manufacturing costs of affinity ligands and suboptimal utilization of stationary phase capacity, leading to reduced productivity and increased costs, particularly in single-column discontinuous modes and traditional control methods requiring multiple detectors for accurate process control.
Innovation Solution
A twin-column sequential loading chromatography process with a dual loading flow strategy and process control using a single detector to optimize capacity utilization and productivity, reducing hardware requirements and improving chromatographic bed height, allowing for efficient product recovery and regeneration with enhanced throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If single-column discontinuous chromatography is used, then equipment simplicity is maintained, but stationary phase capacity utilization is reduced
Solution Approach 1:
The single chromatography column is divided into multiple segments (first column and second column) that operate in sequence. The method segments the loading process into discrete stages where each column segment handles specific portions of the feed, enabling independent optimization of each segment's capacity utilization while maintaining overall system simplicity.
Solution Approach 2:
The chromatography process employs periodic switching between columns with defined loading, washing, and elution cycles. Columns alternate between active loading phases and regeneration phases in a periodic manner, allowing continuous operation at optimal flow rates while maximizing the utilization of stationary phase capacity across the system.
2Productivity
If high linear loading flow rate is used, then throughput is increased, but dynamic binding capacity is reduced
Solution Approach 1:
The system dynamically adjusts operating parameters including flow rate and column switching timing based on real-time process conditions. By optimizing the linear loading flow rate for each column during its active phase and coordinating column switching, the system maintains high throughput while ensuring adequate dynamic binding capacity is achieved during the loading period.
Solution Approach 2:
The method changes operational parameters such as flow rate, loading time, and column switching points to optimize the balance between throughput and binding capacity. By carefully controlling the duration and intensity of loading phases at optimized flow rates, the system achieves high productivity without sacrificing the quantity of product bound to the stationary phase.
3Device complexity
If traditional single detector control is used, then hardware cost is reduced, but process control precision is insufficient
Solution Approach 1:
A single detector is designed to perform multiple measurement functions by detecting different parameters at different times. The detector alternates between monitoring breakthrough curves during loading phases, measuring elution profiles during washing phases, and detecting product concentration during elution phases, thereby providing comprehensive process control data with one instrument.
Solution Approach 2:
The single detector operates continuously throughout the chromatography cycles, constantly monitoring the effluent from the active column. This continuous detection provides uninterrupted process information for controlling loading, washing, and elution phases, maintaining high measurement precision despite using only one detector through optimized sampling and analysis timing.
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 twin-column sequential loading process significantly enhances productivity and capacity utilization, reduces hardware needs, and simplifies process control by using a single detector, achieving high product recovery and minimizing product losses while maintaining chromatographic quality.
Implementation Method 1
affinity materials offer a very high selectivity for the target molecules as they are based on immobilized ligands that bind specifically to the target molecules
Implementation Method 2
the product concentration can be determined online at that outlet, typically by measuring UV light absorbance
Data Source
AI summary
Provided is a method for control and/or monitoring and/or optimization of a chromatographic process, in which the method comprises at least 2 columns which are operated, alternatingly, wherein this operation can be carried out in that the at least 2 columns are operated in interconnected and disconnected states, wherein the columns switch positions after such a sequence of interconnected and disconnected state,and wherein downstream of at least one, or of each column, a detector is located capable of detecting the desired product and/or impurities when passing the detector.