Cytiva ÄKTA readyflux Tangential Flow Filtration System

Overview

The Cytiva ÄKTA readyflux is an automated, single-use tangential flow filtration (TFF) system engineered for scalable, robust, and contamination-controlled bioprocess operations. Based on the well-established hydrodynamic principle of cross-flow filtration—where feed stream velocity is maintained parallel to the membrane surface to minimize fouling and polarization—the ÄKTA readyflux enables precise control over transmembrane pressure (TMP), retentate recirculation rate, and permeate flux. Unlike traditional stainless-steel TFF systems requiring rigorous cleaning-in-place (CIP) and sterilization-in-place (SIP) validation, the ÄKTA readyflux utilizes fully disposable fluid paths, eliminating carryover risk between batches and significantly reducing downtime associated with equipment qualification and changeover. Its modular architecture supports both laboratory-scale process development and pilot-scale production, making it particularly suitable for downstream purification of monoclonal antibodies (mAbs), viral vectors, plasmid DNA, and other sensitive biologics where product integrity and process consistency are critical.

Key Features

• Single-use fluid path design with pre-sterilized, gamma-irradiated components—including tubing sets, pump cassettes, and sensor housings—to ensure aseptic operation and eliminate cleaning validation burden.
• Compact footprint with low minimum recirculation volume (typically 20×) and improved product recovery yield in small-volume applications.
• Integrated peristaltic pumping system with real-time flow monitoring and closed-loop feedback control for stable TMP and consistent shear profile across varying viscosity conditions.
• Multi-mode filtration control: constant flux, constant TMP, constant recirculation flow, or user-defined ramped profiles—configurable via UNICORN method editor.
• Native compatibility with Cytiva’s ReadyToProcess hollow-fiber cartridges (e.g., 0.5–5 m² surface area) and standard cassette-style ultrafiltration/diafiltration devices (e.g., 30–500 kDa MWCO).
• Optional integration with Xcellerex XDUO single-use mixers or third-party bag-based mixing systems for real-time liquid level monitoring and automated feed replenishment during diafiltration.

Sample Compatibility & Compliance

The ÄKTA readyflux accommodates a broad range of biological feed streams—including clarified harvests, cell culture supernatants, lysates, and purified intermediates—without compromising membrane performance or product stability. Its single-use configuration meets stringent requirements for multi-product facilities operating under current Good Manufacturing Practice (cGMP) guidelines. The system supports full traceability through UNICORN’s electronic batch record (EBR) functionality, including time-stamped event logs, parameter setpoints, alarm history, and operator actions—all compliant with FDA 21 CFR Part 11 when deployed with appropriate access controls and digital signature modules. All disposable components are manufactured in accordance with ISO 13485 and supplied with full CoA/CoC documentation. System validation packages—including IQ/OQ protocols—are available through Cytiva’s OptiRun service portfolio.

Software & Data Management

UNICORN software serves as the central control and data management platform for the ÄKTA readyflux. Version 7.2 and later provide a validated, graphical method editor supporting drag-and-drop step sequencing, conditional logic (e.g., “if TMP > X, reduce flow”), and dynamic parameter linking. Real-time trending of critical process parameters—including TMP, permeate flow, retentate pressure, temperature, and conductivity—is visualized on customizable dashboards. All raw data is stored in a secure, relational database (Microsoft SQL Server) with built-in backup scheduling and export options (CSV, PDF, XML). For enterprise-level integration, UNICORN offers OPC UA connectivity to MES/SCADA systems and native DeltaV™ interface drivers for distributed control environments.

Applications

• Concentration and buffer exchange of therapeutic proteins prior to chromatography loading.
• Clarification and polishing of lentiviral and AAV vector preparations using low-shear hollow-fiber membranes.
• Plasmid DNA diafiltration and formulation into final storage buffers.
• Removal of host cell proteins (HCP) and DNA from mammalian cell culture harvests.
• Process development studies comparing membrane chemistries (e.g., regenerated cellulose vs. polyethersulfone) and pore sizes under identical operational conditions.
• Scale-down modeling for tech transfer from lab to manufacturing, leveraging identical single-use hardware and UNICORN method portability.

FAQ

Is the ÄKTA readyflux suitable for GMP manufacturing?
Yes—when operated with validated single-use components, UNICORN Pharma Edition, and documented procedures, the system meets ICH Q5A, Q5D, and Annex 1 requirements for biologics manufacturing.
Can I use non-Cytiva filter cassettes or hollow-fiber modules?
The system supports most commercially available TFF devices via mechanical adapters (e.g., Fluxkart for cassettes) and standardized mounting interfaces; however, performance validation remains the user’s responsibility.
What level of automation does the system offer?
Full end-to-end automation is supported—including auto-start, automatic diafiltration endpoint detection (via conductivity or UV absorbance thresholds), and integrated shutdown sequences—with no manual intervention required during routine runs.
How is system performance verified post-installation?
Cytiva provides comprehensive Installation Qualification (IQ) and Operational Qualification (OQ) documentation, along with optional Performance Qualification (PQ) support for specific process applications.
Does the system support remote monitoring and troubleshooting?
Yes—via UNICORN’s web-based remote access module (with TLS 1.2 encryption) and Cytiva’s secure ConnectCare portal for predictive maintenance alerts and firmware updates.