Lift station pump control
Pre-treated wastewater is brought up from inlet trunk sewers to ground level by centrifugal pumps, where it continues on by gravity flow to subsequent treatment. To maintain a desired level in the headworks wetwell, pump speed is often varied. Pumps turn on and off automatically according to an operator selectable sequence.
Challenge
A desired wetwell level reduces the drop downstream of the influent flumes to minimize turbulence and air entrainment, and eliminates frequent pump cycling associated with variable level control. Proper level control maintenance in the wells can alleviate pump surging, which disrupts settling by causing currents and eddies in the clarifier.
Related products
Other applications
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Splitter box level
Wastewater treatment facilities with a large number of primary clarifiers often employ a concrete tank with chambers and gates known as a splitter box, or distribution box, to split the influent flow into multiple streams that are routed into the bank of clarifiers. A similar device may also be used to split mixed liquor flows between secondary clarifiers.
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