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A pneumatic backflush system can virtually eliminate all in-basin maintenance and manual cleaning, thereby maintaining high oxygen transfer rates and efficiencies.

By simply shutting off the pump, opening the backflush valve and continuing to supply air to the system, the unit’s aerodynamic design converts the submerged aeration system into a pneumatic air lift pump.

In the backflush mode, air flow blows backward through the system, displacing the liquid in the liquid distribution line and pumping the surrounding liquid in the reverse direction through the jets and liquid lines. This cleans the jet nozzles and the submerged aeration system of fouling material and debris. Most plants backflush their aeration tank once each month to maintain maximum efficiency.