Landox Channel Aeration System

The LANDOX channel aeration system is based on the well known principle of an oxidation ditch in which both aeration (fine bubble) and propulsion of the mixed liquor can be independently controlled. The innovation of the LANDOX system is that the flow velocitors are positioned at the bends of the oxidation ditch, creating ideal operating conditions for the diffusers. This results in a higher oxygen transfer as well as lower propulsion energy, hence increasing overall efficiency.

One or more low speed (7-15rpm) vertical LANDOX rotors, located in the bends of the ditch, provide the required propulsion. The LANDOX rotor consists of a vertically mounted drum with 16 radially mounted blades. The rotor may be constructed of either stainless steel or coated mild steel. The revolutionary design of the LANDOX top bearing eliminates the problem of an underwater bottom bearing, yet maintains the strength needed for the suspended rotors to be driven with rugged helical gearboxes.

Other types of flow velocitors - installed in the straight channels of an oxidation ditch - will cause dead zones just after the bends, leading to the settlement of solid particles and sludge. The LANDOX rotors have been designed to be installed in the bends of the ditch, therefore no dead zones will occur.