A fluid mixing system includes a container, such as a flexible bag, bounding a compartment. A flexible drive line is disposed within the compartment, the drive line having a first end rotatably connected to a first end of the container and an opposing second end rotatably connected to a second end of the container. At least one mixing element, such as an impeller, can be coupled with the flexible drive line. Rotation of the drive line facilitates rotation of the impeller within the container.

A bioreactor includes a flexible container and an impeller assembly having a hollow tube. The impeller assembly is coupled to the flexible container. At least one mixing element is removably disposed on the hollow tube. A drive shaft is adapted to engage the hollow tube of the impeller assembly and facilitate rotational movement of the hollow tube.

A fluid mixing system includes a container, such as a flexible bag, bounding a compartment. A flexible drive line is disposed within the compartment, the drive line having a first end rotatably connected to a first end of the container and an opposing second end rotatably connected to a second end of the container. At least one mixing element, such as an impeller, can be coupled with the flexible drive line. Rotation of the drive line facilitates rotation of the impeller within the container.

A modular mixing impeller assembly that includes one or more connection tubes, and one or more impellers configured for assembly to the one or more connection tubes. Each of the one or more impellers has a plurality of mixing blades. Each of the one or more impellers is assembled onto at least one connection tube via a friction fit such that each of the one or more impellers is configured to rotate with its attached connection tube, and wherein the assembly between impeller and connection tube creates an airtight and water-tight seal.

A modular mixing impeller assembly that includes one or more connection tubes, and one or more impellers configured for assembly to the one or more connection tubes. Each of the one or more impellers has a plurality of mixing blades. Each of the one or more impellers is assembled onto at least one connection tube via a friction fit such that each of the one or more impellers is configured to rotate with its attached connection tube, and wherein the assembly between impeller and connection tube creates an airtight and water-tight seal.

A method for mixing a biological suspension includes disposing a biological suspension within a compartment of a container, the biological suspension comprising cells or microorganisms suspended within a nutrient growth medium; and rotating a first drive line and laterally spaced apart second drive line within the compartment of the container so as to cause the drive lines to twist into a helical configuration and mix the biological suspension.

A method for mixing a biological suspension includes disposing a biological suspension within a compartment of a container, the biological suspension comprising cells or microorganisms suspended within a nutrient growth medium; and rotating a first drive line and laterally spaced apart second drive line within the compartment of the container so as to cause the drive lines to twist into a helical configuration and mix the biological suspension.

A fluid mixing system includes a container, such as a flexible bag, bounding a compartment. A flexible drive line is disposed within the compartment, the drive line having a first end rotatably connected to a first end of the container and an opposing second end rotatably connected to a second end of the container. At least one mixing element, such as an impeller, can be coupled with the flexible drive line. Rotation of the drive line facilitates rotation of the impeller within the container.

A fluid mixing system includes a container, such as a flexible bag, bounding a compartment. A flexible drive line is disposed within the compartment, the drive line having a first end rotatably connected to a first end of the container and an opposing second end rotatably connected to a second end of the container. At least one mixing element, such as an impeller, can be coupled with the flexible drive line. Rotation of the drive line facilitates rotation of the impeller within the container.

A liquid mixing system includes a support housing at least partially bounding a compartment. A mount is secured to the support housing. A drive motor assembly is configured to engage a drive shaft for moving the drive shaft within the compartment of the support housing. A four bar linkage system extends between the mount and the drive motor assembly, the four bar linkage system being movable between a first position wherein the drive motor assembly is disposed at a first elevation and a second position wherein the drive motor assembly is disposed at a second elevation that is different from the first elevation.