The Fuchs Centrox-Aerator consists of a vertically mounted TEFC-motor with drip cover, base plate, drive shaft, suction pipe with gas intake, diffuser and an impeller with curved blades. The rotating impeller draws the liquid from underneath and the gas through the suction pipe from above. It swirls gas and liquid and centrifuges the mixture along the diffuser outwards. The aeration takes place with fine bubbles and high carbon dioxide utilization. Thus problems with sprayed water, cooling-off during wintertime and odors are avoided. The design of the aerator is simple and sturdy without bearings and seals in the immersed part.