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Details
Types |
Vortex Unit |
Surface Aerators |
Air diffusion |
Remarks |
Power Requirement |
Very small/ the force of Gravity helps so needs less HP. |
High/ the force of Gravity must be overcome so needs more HP. |
High / high power need to compress air and overcome head of water. |
Very Small |
Air Bubble Size |
Micro |
Bigger |
Tiny |
Micro |
Air/water contact time |
Long because air bubbles are captured in toroidal flow. |
Less-Time taken by liquid to travel from impeller to liquid surface. |
Proportional to the depth of placement of diffuser from surface. |
Maximum retention time of air bubbles in water due to toroidal flow |
BNR* |
High |
Low |
Low |
High |
Liquid circulation |
Effective |
Solid accumulate at corners of basin |
Less |
Water moves in natural ways. |
Installation |
Easy |
Civil work required |
Pressure piping is required. |
Simply slip in lagoon or tank |
Maintenance |
Less |
High in high pH liquid |
High |
Negligible |