Hyperclassic Mixer Aerators


The HyperClassic Mixer Aerator was developed and optimized for demanding applications in municipal and industrial wastewater treatment plants. It is very similar to the HyperClassic Mixer, but also includes an air sparger directly below the impeller.


With most other aeration types, mixing intensity decreases as aeration decreases. This often gives rise to the need for separate aeration and mixing equipment, or over-aeration to maintain adequate mixing. The HyperClassic Mixer Aerator overcomes these disadvantages by providing independent mixing and aeration in one integrated unit. This makes it ideal for use in swing zones, low load zones such as at the end of aeration lanes in Sequencing Batch Reactors (SBRs), and where there are high fluctuations of load such as in industrial effluent treatment.


During aeration mode, air or gas is introduced under the hyperboloid impeller through a specially designed air sparger system where large bubbles are released. These hit the shaped underside of the hyperboloid mixer-body, which is equipped with shear fins and dispersing tunnels. As the hyperboloid impeller rotates, the air is dispersed into fine bubbles by the shear fins underneath the impeller. The strong flow then transports these fine bubbles radially outwards and distributes them throughout the whole tank.

This optimized form of mechanical aeration creates fine bubbles sizes with a high alpha factor and particularly high retention times, achieving high oxygen transfer efficiencies.


In addition to and independently of aeration, the HyperClassic Mixer Aerator maintains efficient mixing. Mixing energy is introduced in a radial flow pattern on the tank floor where it is needed most, thus preventing undesirable settlement.


Bio-aerosols and their associated risks are minimised by the absence of surface spray, eliminating the need for splash covers. HyperClassic Mixer Aerators are also quieter than many other mechanical aerators.


The air sparger system is constructed from HDPE or stainless steel and does not have any fine pores or membranes that are susceptible to silting, clogging, abrasion or tearing. This means that there is absolutely no loss of efficiency as time goes on – a common downside of fine-bubble diffused aeration.


A cage-mounted option is available, allowing installation and maintenance to be performed in ‘live’ tanks with minimal interruption.