Method for a dynamic in-line mixing process

A bioprocess arrangement for the dynamic inline mixing of a pressurized medium containing a liquid and at least one further liquid or solid constituent, the liquid being able to be merged with the at least one further liquid or solid constituent in a predefined volume ratio at an opening point to form a resulting liquid flow, the bioprocess arrangement having a line arrangement with at least one line through which the medium to be mixed is conducted, the bioprocess arrangement having a pump arrangement with a first pump, the first pump being arranged in the line of the line arrangement, the first pump being designed as a rotary pump, configured for the dynamic inline mixing of the medium, the first pump having a liquid inlet which during intended operation forms the suction side of the pump, and a liquid outlet which during intended operation forms the pressure side of the pump, and the medium being conducted through the rotary pump for the purpose of dynamic inline mixing,

• wherein the rotary pump is arranged in such a way that, for the purpose of dynamic inline mixing, during operation of the bioprocess arrangement, it is flowed through in the opposite direction of flow compared with intended operation.