Quick Definition
What is a Wave Bioreactor Bag (Rocker Bag)?: A wave bioreactor bag (rocker bag) is a single-use bag designed for use on a rocking platform that generates wave motion in the culture medium, providing oxygen transfer and mixing without mechanical agitation or sparging. Used for mammalian cell culture at 10–50 L scale in the seed train and for virus production.
Wave bioreactor vs stirred tank
Wave bioreactors are preferred for: shear-sensitive cells, insect cells, viral production; seed train expansion from vial to 50 L; small-scale GMP runs (<50 L); and parallel process development at small scale. Stirred tank bioreactors (3D bags >100 L) are preferred for: large-scale commercial production; precise pH/DO/temperature control with feedback; and high cell density processes requiring sparging.
Oxygen transfer limitation
Wave bioreactor oxygen transfer occurs via gas-liquid interface created by wave motion — not through a sparger. This limits maximum cell density (~5–10 × 10⁶ cells/mL for most mammalian lines) compared to sparged stirred tanks (>20 × 10⁶ cells/mL with perfusion).
Key Facts
- Placed on rocking platform (1–40 RPM, 4–12° tilt) — wave motion at liquid surface drives oxygen transfer
- Volume range: 10 L, 20 L, 50 L (working volume 40–70% of bag volume)
- Shear stress: significantly lower than stirred tank bioreactors — beneficial for shear-sensitive cells and viral production
- No mechanical agitation, no sparger — oxygen via surface aeration; CO₂ stripping via gas inlet
- Compatible with: Sartorius BIOSTAT RM, GE Wave, Thermo Scientific Rocker platforms
- Used for: seed train expansion, virus production (AAV, lentivirus), small-scale GMP runs, process development
Further Reading
SeamlessBio GmbH · Passau, Germany · info@seamlessbio.de
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