GOETTINGEN, Germany--(BUSINESS WIRE)--Today, Sartorius Stedim Biotech (SSB)(Paris:DIM), a leading international supplier for the pharma and biotech industries, announced a substantial expansion of its technology portfolio in the area of single-use bioreactors. At the 2009 ACHEMA, the world’s largest trade show for the process industry, the company is presenting two prototypes of innovative single-use bioreactors that operate based on novel mixing technologies. These cell culture systems were developed in cooperation with the German company Bayer Technology Services GmbH (BTS) and the Swiss cell culture specialist ExcellGene SA . The new bioreactors have been specially designed for the manufacture of monoclonal antibodies, recombinant proteins and vaccines.