Sartorius Stedim Biotech launches next generation BIOSTAT STR bioreactors

Sartorius Stedim Biotech (SSB), a leading international supplier for the biopharmaceutical industry, announced the launch of its next generation BIOSTAT STR^®, a fully scalable, single-use bioreactor family based on a conventional stirred-tank design. This new bioreactor range featuring upgraded hardware and software, as well as a fully integrated, new design of Flexsafe STR^® single-use bags, ensures quick and easy bioprocess scale-up of biologics and vaccines.

Figures: left to right, shows SSB’s new BIOSTAT STR^® 500L (open and closed view) and single-use Flexsafe STR^® bag

The BIOSTAT STR^® bioreactors are equipped with an improved stainless steel bag holder for userfriendly installation of the single-use Flexsafe STR^® bag. The bioreactor series consisting of five systems in different sizes offers working volumes from 12.5 L to 2,000 L. Because the bioreactors are designed with the same geometries as SSB’s ambr^® 250 mini bioreactor, the industry gold standard for scale-down, linear scale-up and process transfer from 250 mL to 2,000 L can be achieved in weeks rather than months using this innovative technology platform.

The new bioreactors and the newly introduced single-use Flexsafe STR^® bags are a perfect match. The bags with advanced single-use sensor solutions are manufactured from a proprietary, robust multilayer S80 polyethylene film. The formulation of resins and additives for the film are fully characterized, and extrusion process parameters are controlled within established ranges, providing consistent batch-to-batch extractable and leachable profiles. The fully self-contained design of the new bioreactor with its single-use bag prevents product cross-contamination, saving time in set-up, validation, clean-in-place procedures and sterilize-in-place operations.

Besides using bags of the highest purity, the system is designed for efficient oxygen transfer, mixing and CO₂ stripping. These combined features ensure excellent cell culture performance with reproducible high-density growth of even sensitive cell lines. As a result, BIOSTAT STR^® bioreactors are ideal for achieving very high cell densities in continuous processes and for safe manufacture of vaccines and recombinant proteins in cGMP environments.

The new bioreactor range provides greater flexibility in bioprocess control and data acquisition as software connectivity has been upgraded to allow integrated control by either BioPAT^® MFCS software or commonly used third-party industrial distributed control systems (DCS), such as Emerson DeltaV™ or Siemens SIMATIC PCS7.

Dr. Thorsten Adams, Director of Product Management for Fermentation Technologies at Sartorius Stedim Biotech, stated:

Direct linear scalability is crucial for ensuring the efficiency and cost effectiveness of bioprocess development campaigns. Compared with conventional stainless steel vessels, our next generation BIOSTAT STR^® bioreactors in combination with the ambr^® 250 technology will help reduce process development timelines significantly. These highly scalable, single-use bioreactors are an intelligent, low-risk bioprocess development solution for use in multi-product facilities, as well as at contract manufacturing organizations, for the production of biologics and vaccines.