example of from about 5 l to 30 000 l e g 50 l to 5000 l for example the total capacity of the vessel may be 75 l 150 l 300 l 500 l 1000 l 1500 l 3000 l or 5000 l it may be preferred that the vessel have an aspect ratio diameter height of for example about 0 5 1 to about 4 1 or about 0 5 1 to 2 1 e g about 0 5 1 to 1 1 a shaft 104 extends into the vessel and a jet mixing device 106 is mounted at the distal end of the shaft as will be discussed in detail below the jet mixing device 106 creates a circulating flow in the liquid 108 in the vessel as indicated by the arrows entering and leaving the jet mixing device in the embodiment shown in fig1 the jet mixing device 106 includes a shroud 110 and an impeller 112 disposed within the shroud however the jet mixer may have any of the structures disclosed herein or any other desired structure which produces jet flow in the embodiment shown in fig1 the shaft 104 is driven by a motor 114 however other types of jet systems may be used as will be discussed below.