Solutions Guide

Securing the Flow in Bioprocessing

Single-use risk builds at five points, from cell culture to final fill. This guide maps all five.

Contamination opportunities in a single-use bioprocess do not start at the filling line. They arise at five points: cell expansion and harvest, mixing and formulation, in-process sampling, aliquoting or bulk filling, and final fill, wherever fluid is exposed, a connection is made, or a container changes hands. By the time a batch reaches final fill, it has passed through all five, and it is at its most valuable. Securing the Flow in Bioprocessing takes each point in turn and shows the engineering that reduces unnecessary connections and manual interventions at each one.

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Cover of the Securing the Flow in Bioprocessing solutions guide, navy with white title
21-Page PDF
6 Chapters, Cell Culture to Final Fill
4 Product Line Experts
1 CDMO Case Study
Why now

Modality Diversity Is Changing What a Fluid Path Must Do

Biopharmaceutical manufacturers now run an increasingly diverse product mix: monoclonal antibodies, mRNA and other nucleic acid therapies, viral vectors, cell and gene therapies, bispecific antibodies, and antibody-drug conjugates (ADCs). These modalities tend to bring small batch sizes, high product value, formulation-specific requirements, and frequent product changeovers, and they need to move from clinical to commercial scale without a redesign at every step.

Equipment built for high-volume small molecules, such as stainless-steel tanks and fixed filling lines, can make that harder through capital cost, cleaning validation, minimum working volumes, and limited flexibility.

EU GMP Annex 1, revised in 2022, sets expectations for a contamination control strategy and for identifying, risk-assessing, and minimizing aseptic interventions, and it added sections on single-use and closed systems. It does not call for any particular product or supplier.

The engineering challenge is to design the fluid path around the drug product and its process, rather than fit every product to the same equipment.

The approach

Fluid Path Design Decides How Much Single-Use Reduces Risk

Single-use technology can reduce cleaning requirements and contamination opportunities, but how much depends on fluid path design, material selection, connection management, and process controls. Assembled from generic parts on an otherwise unchanged workflow, it can leave in place the connection points and particulate risks it was meant to remove.

  • Capsule filter
  • Multi-bottle sampling assembly on a stand
  • Single-use tubing set with end connectors
  • Tubing assembly with a valve and fittings
  • Coiled tubing with connectors
  • Bottle with closure and tubing
  • Manifold with valves feeding two containers
  • Two bottles on a mixing plate, joined by one cap manifold
  • Two bottles filled from one shared feed line

The guide sets out the alternative: a fluid path engineered component by component around the drug.

SaniSure builds five solutions on that approach, each addressing a distinct operation rather than forming one integrated system: closed, automated roller bottle cell culture with RC-40™, low-shear mixing with Mixed4Sure™, sterile sampling with One2Sample®, simultaneous aliquoting with One2Fill™, and custom fill-finish assemblies with Fill4Sure™.

Across downstream operations, four of these solutions can use common components: PharmaTainer™ bottles, Cap2V8® closures, CellGyn® tubing, fittings, and clamps. That can support fluid-path consistency, simplify supplier management, and allow reuse of relevant component qualification data. Application-specific suitability, material compatibility, sterilization, and validation still need to be evaluated. The guide shows what each solution changes at its point, and the engineering behind it.

Inside the guide

Every Chapter Answers a Question Your Team Already Asks

Six chapters, in process order. Each of the four solution chapters is led by the SaniSure product line expert for that solution.

  1. Chapter 01Overview

    Where risk accumulates

    Where do contamination opportunities, manual interventions, and product losses arise across the single-use fluid path?

    Opening chapter, the problem across the path

  2. Chapter 02RC-40

    Cell expansion and harvest

    How do you scale adherent roller bottle culture without a room of technicians opening bottles by hand, and without walking away from a process regulators already trust?

    Michael CastelliGlobal Product Line Manager, Upstream Solutions

  3. Chapter 03Mixed4Sure

    Mixing and formulation

    What do you mix in when the batch is under 20 L, stainless brings capital cost and cleaning validation, and a bag mixer brings setup time and a minimum volume? Includes a note on containing ADC payloads.

    SpecsMixed4Sure: 50 mL – 20 L working volume.

    Jordan CobiaGlobal Product Line Manager, Mixed4Sure

  4. Chapter 04One2Sample · One2Fill

    Sampling and aliquoting

    How many sterile connections does your sampling and aliquoting plan really need, and how many vent filters does it leave you to integrity-test?

    SpecsOne2Sample: up to ten samples through one sterile connection. One2Fill: up to ten bottles from one feed line, 125 mL – 2 L, ±3% fill accuracy.

    Galen DaoGlobal Product Line Director, One2Sample and One2Fill

  5. Chapter 05Fill4Sure

    Final fill

    Should the drug adapt to the filling line, or the filling line to the drug? Includes a CDMO case study on GLP-1 fill-finish, where sensitivity to gamma-irradiated silicone meant redesigning the assembly for autoclave sterilization.

    Dr. Alexander Van HagenGlobal Product Line Manager, Fill4Sure

  6. Chapter 06All five solutions

    One path, stage by stage

    How can shared single-use components support consistency across operations?

    Closing chapter, the full path in sequence

Common Questions

Securing the Flow in Bioprocessing: FAQ

Where does contamination risk arise in single-use bioprocessing?

Contamination opportunities in single-use bioprocessing can arise at five points: cell expansion and harvest, mixing and formulation, in-process sampling, aliquoting or bulk filling, and final fill. Open manipulations, fluid transfers, connection points, and manual interventions are where they enter. Final fill is the least forgiving, because the batch is at its most valuable there.

Does single-use technology automatically reduce contamination risk?

Not by itself. Single-use technology can reduce contamination opportunities when the fluid path is designed around the specific drug product and process, and the effect depends on system design, component integrity, and process controls. A single-use bag connected with generic fittings on an otherwise unchanged workflow can leave the same connection points and particulate risks in place.

What do I receive when I download Securing the Flow in Bioprocessing?

You receive the full 21-page Securing the Flow in Bioprocessing solutions guide as a PDF, ready as soon as you submit the form and also sent by email. It has six chapters: where risk accumulates, cell expansion, mixing, sampling and aliquoting, final fill, and a closing stage-by-stage map, plus one CDMO case study.

Which SaniSure solutions does Securing the Flow in Bioprocessing cover?

Securing the Flow in Bioprocessing covers five SaniSure solutions: RC-40 for automated roller bottle cell culture, Mixed4Sure for single-use mixing from 50 mL – 20 L, One2Sample for up to ten samples through one sterile connection, One2Fill for filling up to ten bottles from one feed line with ±3% accuracy, and Fill4Sure for custom fill-finish assemblies.

Can shared single-use components reduce qualification effort?

Using common components across compatible processing stages can let manufacturers draw on existing component characterization and qualification data. In Securing the Flow in Bioprocessing, four solutions share PharmaTainer bottles, Cap2V8 closures, and CellGyn tubing. Application-specific assessments, process conditions, material compatibility, and validation requirements must still be considered.

Who is Securing the Flow in Bioprocessing written for?

Securing the Flow in Bioprocessing is written for Manufacturing Science and Technology (MSAT), bioprocess engineering, process development, fill-finish, quality assurance, and validation professionals evaluating single-use technologies. It suits teams moving small, high-value batches from clinical to commercial scale, or running several modalities through the same facility.

Will Securing the Flow in Bioprocessing qualify these solutions for my process?

No. Securing the Flow in Bioprocessing describes engineering approaches and product capabilities at each of the five points. Manufacturers must independently assess component suitability, process-specific risks, and applicable qualification and validation requirements. For a question about your own fluid path, a SaniSure specialist can work through it with you.

Read the Full Guide
Five Points. One Engineering Approach.
From cell expansion to the last drop of final fill.

Six chapters from cell expansion to final fill, four of them led by SaniSure product line experts, and a CDMO case study from a GLP-1 fill-finish line.

Have a specific process question? Talk to a Specialist.