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 Tech Talk
Surface Aerators and Direct-Drive Mixers: a Perfect Complement
 | Aqua DDM Direct-Drive Mixer
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Using a surface aerator for oxygenation, mixing and maintaining biomass suspension in your system is a good idea. So is using a direct-drive mixer. However, if you use both together, you will have even better results.
Operating an up-flow surface aerator and a down-flow mixer together creates a complementary flow pattern that gives you better solids suspension and increased distribution of oxygen and substrate. The variable oxygen input keeps the system operating at the most efficient oxygen supply level.
Since this system requires less overall horsepower, you will improve your process efficiency. Energy costs are reduced by 30 to 40% in most applications.
Combining an up-flow surface aerator (left) and
down-flow mixer (right) results in better mixing and energy efficiency.
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Applications include:
Retrofitting existing aeration systems, including
extendaeration, aerobic digestion, equalization
and aerated lagoons
Variable load, activated sludge systems
Municipal-industrial combinations
Oxidation ditches
Long residence time processes in cold climates
Aqua-Aerobic®’s MixAir System combines an AquaDDM direct drive mixer with an Aqua-Jet surface aerator. The Aqua-Aerobic products are new to our #118 catalog. You can find them on pages 53 and 1379.
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