Bioreactor:

A container used for fermentation or enzymatic reactions. Bioreactors vary in size from benchtop fermentors to standalone units. 

Vessel or container in which a biological reaction occurs. Often used in manufacturing efforts to produce pharmaceuticals. 

a contained vessel or other structure in which chemical reactions are carried out (usually on an industrial scale), mediated by a biological system, enzymes or cells. A bioreactor can range in size from a small container to an entire building.