Aeration Industries International (AII)

Midwest town’s oxidation oval trouble-free for decades!


Courtesy of Courtesy of Aeration Industries International (AII)

Year-round compliance is met in this double oxidation system


The Department of Natural Resources was very rigid in its requirements to keep this popular recreational river area free from pollution. The town’s wastewater treatment plant had problems with the two rotor units used for aeration in its oxidation oval. A 40 hp (30 kW) motor powered each rotor unit. When one was down, they lost 50% of their horsepower and aeration effectiveness. The plant also treated some industrial wastewater. Downtimes as long as two months were disastrous with this old system.


In the early 1980’s, the plant installed 10 - 7.5 hp (5.5 kW) AIRE-O2® aspirator aerators, spaced at intervals around the oval, to maintain a good flow and mix of the wastewater. When routine maintenance was required on a unit, only a fraction of the total horsepower was effected. Maintenance was quick and easy. The AIRE-O2® units have worked equally well during years of frigid winters since aeration and mixing occur beneath the ice surface.


This site has remained trouble free and provided the city with superior treatment performance for decades, which includes very severe winters that would challenge most systems. The plant superintendent has allowed Aeration Industries’ guests from all over the world to take a plant tour of the facility, convenient with its close proximity to the company’s headquarters.

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