A thermal immersion circulator can comprise a heater including a hollow cylindrical main body having an inlet opening at a first end thereof and an outlet opening in a side wall thereof. The heater can include a flexible circuit board having a plurality of resistive bands controlled by controlling electronics such as TRIACs, which can be water-cooled. A thermal immersion circulator including such a heater can be used in scientific laboratories or sous vide food cooking.

An automated system associates an agitator with a respective container for containing fluid, such as paint. The system includes a plurality of agitators; a storage area where the plurality of agitators are arranged; a moving device for moving the agitators at least between the storage area and the container; and a control system for controlling and coordinating the operations of the system. The agitators include a locking mechanism for removably fixing the agitator to the respective container.

Described are systems and methods of mixing a liquid in a container, while liquid is being added or removed from the container, and with control of the speed of a mixing device that mixes the liquid to prevent an undesired mixing effect such as splashing, formation of a vortex, foaming, and vibration of a shaft of a mixing device used to mix the liquid.

A thermal immersion circulator can comprise a heater including a hollow cylindrical main body having an inlet opening at a first end thereof and an outlet opening in a side wall thereof. The heater can include a flexible circuit board having a plurality of resistive bands controlled by controlling electronics such as TRIACs, which can be water-cooled. A thermal immersion circulator including such a heater can be used in scientific laboratories or sous vide food cooking.

Methods and apparatus for the treatment of animal waste are disclosed, together with a treated animal waste and fertilizer and growth media products derived therefrom.

A mixing apparatus and system includes a hub, a plurality of blades, and a respective hinge for each blade to pivotally secure each blade to the hub. Each hinge including a lock having a tab and a detent to secure the respective blade in an operating conformation.

Methods and apparatus for the treatment of animal waste are disclosed, together with a treated animal waste and fertilizer and growth media products derived therefrom.

An automated system associates an agitator with a respective container for containing fluid, such as paint. The system includes a plurality of agitators; a storage area where the plurality of agitators are arranged; a moving device for moving the agitators at least between the storage area and the container; and a control system for controlling and coordinating the operations of the system. The agitators include a locking mechanism for removably fixing the agitator to the respective container.

The disclosure relates to a drive shaft system (1) for use with a container for mixing a fluid, being a container for a bioreaction, and a container holder for holding the container, comprising: a drive shaft coupling (4) having: a container connection (5) for connecting the drive shaft coupling to the container; a motor connection (6), for detachably connecting the drive shaft coupling to a stationary part of a motor of the container holder, provided with a first alignment element (25, 26) to be rotationally aligned with a second alignment element (27, 28) provided on the stationary part; a drive shaft (9), rotatably arranged in the drive shaft coupling, having: a first drive shaft end (10) configured for detachable coupling to a rotatable output shaft end of the motor; a second drive shaft end (12); and an agitation device (13), connected to the drive shaft.