Cadence™ Virus Inactivation System product photo Primary L

Cadence™ Virus Inactivation System

Single-use virus inactivation system for batch and continuous processing

The Cadence Virus Inactivation (VI) system is a fully automated system that provides the ability to perform low pH virus inactivation to an incoming elution stream continuously, with minimal operator involvement.

Benefits

  • Designed for integrated unit operation
  • Fully automated for true continuous processing
  • Reduced risk of operator error
  • Ability to operate in batch or continuous mode for flexible facility fit

The system will collect the elution stream from a Cadence BioSMB Process system, however it can easily process as standalone system or with a batch chromatography system.

Automation of the manual operations of elution collection, titration to low pH, hold, titration to high pH, and then transfer out.

The system comprises of a control unit which attaches to one or two system specific Allegro™ single-use mixers dependent on the application. The specification of the manifolds currently supports 24 hours continuous operation.

Overview

Low pH virus inactivation has traditionally been a labor intensive task, involving a sequence of manual operations. The Cadence Virus Inactivation system takes this proven methodology and fully automates the process.

The progress toward unit operation integration and parallel continuous processing makes the adoption of an automated methodology necessary, with the added benefits of reduced operator error and more repeatable operations.

Figure 1
A circular process status graphic shows system state at a glance

Software

The software represents the latest generation of the Pall automation philosophy; such that all interactions and workflows have been carefully designed and tested to minimize operator error and allow easy interaction with the system.

The program comes with inbuilt sequences for both batch and continuous operation, which can be fully configurable to meet all process requirements. The system is supplied with an Open Platform Communications (OPC) server to allow easy connection with other units and supervisory control and data acquisition (SCADA) systems.

Figure 2
Home screen of the software

Figure 3
The Cadence VI system is designed to work as an integrated unit operation downstream from the Cadence BioSMB Process systems
Figure 4
Schematic of the Cadence Virus Inactivation system

Mode of Operation

Recirculation Loop

The fluid flow into and out of the mixer is via the bottom of the unit, using the recirculation loop. The recirculation loop facilitates:

  • Entry of externally pumped elutions into the mixer
  • Addition of acid and base
  • Transfer out of treated elution pool after processing
  • Mixing of the elution pool during titrations and hold
  • Sampling of elution pool

The gentle manner of liquid addition from the bottom of the mixer, combined with close control of the impeller by the control unit allows the transfer, titration and mixing of the elution pool without foaming and splash back – minimizing the risk of carry over between batches of elution.

Two Mixer Operation

The system mimics the traditional approach of manual low pH virus inactivation. The collection, low pH titration down, hold and high pH titration are all performed in the same mixer.

During continuous operation, when the system has reached steady state, the incoming elution flow is collected into one mixer, while the second mixer processes the collected elutions.

When mixer #2 has finished processing and has transferred out the current treated elution pool, it is then available for receiving elutions. Mixer #1 can then begin treating the next batch of elutions while the elution stream is directed to mixer #2. The diversion of the flow between mixers can be set to be switched immediately once a mixer is empty, when a certain fill level has been reached, or alternatively when connected to the continuous chromatography system at the end of the current elution after a certain minimum volume has been collected.

The valve block provides an effectively zero dead-leg valve configuration which ensures that the entire elution pool in the mixer and recirculation loop are effectively mixed and exposed to the inactivation cycle.

Single Mixer Operation

The system can operate with only one mixer attached, facilitating batch operations. A dedicated method template is included within the software to allow easy configuration.

pH Titrations

To ensure time efficient operation, the titrations are based on a decreasing dosing volume system. An initial large dose is added to make a quick step change in pH to get close to the desired set point, subsequently medium sized doses are added until an intermediate set point is reached. To obtain the final pH set point the titration process adds small doses, mixes and checks the pH until the final set point is reached.

The use of decreasing dose methodology ensures that the risk of overshoot is minimized, while processing in a timely manner.

For both acid and base additions, the titrations are fully configurable to ensure that the process can be optimized for a particular application.

Pall can supply onsite support with a subject matter expert to ensure that configuration and integration with your process is as easy as possible.


Figure 5
pH graph showing steady state titrations to low pH and high pH set points



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Description

Single-use virus inactivation system for batch and continuous processing

The Cadence Virus Inactivation (VI) system is a fully automated system that provides the ability to perform low pH virus inactivation to an incoming elution stream continuously, with minimal operator involvement.

Benefits

  • Designed for integrated unit operation
  • Fully automated for true continuous processing
  • Reduced risk of operator error
  • Ability to operate in batch or continuous mode for flexible facility fit

The system will collect the elution stream from a Cadence BioSMB Process system, however it can easily process as standalone system or with a batch chromatography system.

Automation of the manual operations of elution collection, titration to low pH, hold, titration to high pH, and then transfer out.

The system comprises of a control unit which attaches to one or two system specific Allegro™ single-use mixers dependent on the application. The specification of the manifolds currently supports 24 hours continuous operation.

Overview

Low pH virus inactivation has traditionally been a labor intensive task, involving a sequence of manual operations. The Cadence Virus Inactivation system takes this proven methodology and fully automates the process.

The progress toward unit operation integration and parallel continuous processing makes the adoption of an automated methodology necessary, with the added benefits of reduced operator error and more repeatable operations.

Figure 1
A circular process status graphic shows system state at a glance

Software

The software represents the latest generation of the Pall automation philosophy; such that all interactions and workflows have been carefully designed and tested to minimize operator error and allow easy interaction with the system.

The program comes with inbuilt sequences for both batch and continuous operation, which can be fully configurable to meet all process requirements. The system is supplied with an Open Platform Communications (OPC) server to allow easy connection with other units and supervisory control and data acquisition (SCADA) systems.

Figure 2
Home screen of the software

Figure 3
The Cadence VI system is designed to work as an integrated unit operation downstream from the Cadence BioSMB Process systems
Figure 4
Schematic of the Cadence Virus Inactivation system

Mode of Operation

Recirculation Loop

The fluid flow into and out of the mixer is via the bottom of the unit, using the recirculation loop. The recirculation loop facilitates:

  • Entry of externally pumped elutions into the mixer
  • Addition of acid and base
  • Transfer out of treated elution pool after processing
  • Mixing of the elution pool during titrations and hold
  • Sampling of elution pool

The gentle manner of liquid addition from the bottom of the mixer, combined with close control of the impeller by the control unit allows the transfer, titration and mixing of the elution pool without foaming and splash back – minimizing the risk of carry over between batches of elution.

Two Mixer Operation

The system mimics the traditional approach of manual low pH virus inactivation. The collection, low pH titration down, hold and high pH titration are all performed in the same mixer.

During continuous operation, when the system has reached steady state, the incoming elution flow is collected into one mixer, while the second mixer processes the collected elutions.

When mixer #2 has finished processing and has transferred out the current treated elution pool, it is then available for receiving elutions. Mixer #1 can then begin treating the next batch of elutions while the elution stream is directed to mixer #2. The diversion of the flow between mixers can be set to be switched immediately once a mixer is empty, when a certain fill level has been reached, or alternatively when connected to the continuous chromatography system at the end of the current elution after a certain minimum volume has been collected.

The valve block provides an effectively zero dead-leg valve configuration which ensures that the entire elution pool in the mixer and recirculation loop are effectively mixed and exposed to the inactivation cycle.

Single Mixer Operation

The system can operate with only one mixer attached, facilitating batch operations. A dedicated method template is included within the software to allow easy configuration.

pH Titrations

To ensure time efficient operation, the titrations are based on a decreasing dosing volume system. An initial large dose is added to make a quick step change in pH to get close to the desired set point, subsequently medium sized doses are added until an intermediate set point is reached. To obtain the final pH set point the titration process adds small doses, mixes and checks the pH until the final set point is reached.

The use of decreasing dose methodology ensures that the risk of overshoot is minimized, while processing in a timely manner.

For both acid and base additions, the titrations are fully configurable to ensure that the process can be optimized for a particular application.

Pall can supply onsite support with a subject matter expert to ensure that configuration and integration with your process is as easy as possible.


Figure 5
pH graph showing steady state titrations to low pH and high pH set points

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Specifications

Cadence Virus Inactivation
System

 
Dimensions main control unit
(w x d x h)
1100 x 900 x 2005 mm without warning light
1100 x 900 x 2225 mm with warning light
Dimensions Allegro mixer
(w x d x h)
964 x 654 x 1364 mm
Weight 350 kg (main control unit)
155 kg (Allegro mixer, full)
105 kg (Allegro mixer, empty)
Number of mixer positions 2
(2 required for continuous operation,
1 required for batch operation)
Maximum operating pressure 0.4 barg single-use assembly
(Atmospheric pressure only in mixer
biocontainer)
Air supply 6 barg
(Main control unit feeds air to the mixers)
Electricity supply Single phase
 

Cadence Virus Inactivation –
Single-Use (SU) System

 
Manifold Specifications
Item Description
Hose and connectors All tubing is silicone, with CPC
connectors internally and sanitary clamp
connectors to interface with upstream
and downstream processes
Pressure PendoTECH pressure transmitter
Recirculation pump Insert is standard silicone tubing rated for
24 hours operation
Transfer pump Insert is standard silicone tubing rated for
24 hours operation
Gamma irradiation dose 25-50 kGy
Tube size 1/4 in., 3/8 in., 1/2 in.
 

Process Wetted Materials
of Construction

 
Material* Claims & Compliances
Silicone USP <88> Class VI, USP <87>, 21CFR177,
latex free, phthalate free, melamine free
Polypropylene (PP) USP <88> Class VI, 21CFR177, latex free,
phthalate free, melamine free
Polysulfone (PSU) USP <88>. Class VI, ISO 10993, USP <661>,
USP <381>, latex free, phthalate free,
melamine free
Phthalate free USP <88> Class VI, ISO 10993, USP <661>,
latex free, melamine free
 
 
Expiry and Lead Time
Lead time Manifolds are made to order on a lead
time of 6 weeks ex-works
Expiry Manifolds carry a minimum shelf life of 24 months
 

*All components are either ADIF or EMA/410/01 compliant

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Performance

The Cadence VI system can process elutions at a rate of up to approximately 30 L/hr. The flow rate that the system can accommodate is dependent on titration behaviors, incubation time and other upstream process conditions.

To put this into context, for a typical mAb process the tables below show a guideline operating envelope for the Cadence Virus Inactivation system with 50 L Allegro single-use mixers. Please contact Pall for help with detailed capacity determination.

Manifold Installation

The manifolds are designed to be installed in less than30 minutes, and are color coded to ensure that the installation is right first time, every time. The operator is additionally lead by an onscreen installation guide. The entire process has been developed through user testing to ensure simple installation, resulting in time savings while minimizing operator error.

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Additional Information
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Ordering Information

Cadence Virus Inactivation
Hardware Systems

 
Part Number Description
VICAD-PR-1 VI - Control system complete with two
pH probes
VICAD-LGR-50 VI - Allegro 50 L mixer VI specific
 
 
Cadence Virus
Inactivation SU
Systems
The Cadence VI system comprises
4 separate manifolds. A manifold to
interconnect with the upstream elution
source, the control panel manifold and
two identical mixer biocontainer manifolds.
The manifolds are supplied double
bagged and gamma irradiated
 
 
Part Number Description
VICAD-CT-1 VI - Manifold for the control system
(includes interconnection manifold and
control system manifold), 1 required
VICAD-MX-50 VI - Allegro 50 L mixer biocontainer
VI specific, no pH probe, 2 required to
complete the system
LGRMX225PH pH probe, 2 required per system,
reusable probes. First set supplied with the control system
639-80N pH probe installation bellows, 2 required per system
 
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Segment
Continuous Processing