Revitalizing Old Aeration Blowers With VFDs

A St. Louis plant team, consultant and manufacturer team up with an innovative solution to extract better efficiency and process control from an older aeration blower.
Revitalizing Old Aeration Blowers With VFDs
A project at the Lemay Wastewater Treatment Plant in St. Louis gave new life to an old aeration blower.

Variable-frequency drives (VFDs) have been used for decades to control multistage centrifugal blowers. The increasingly popular turbo blowers also use VFDs for flow control and energy optimization.

VFDs have not been applied to geared, single-stage centrifugal blowers —...

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