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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.

Challenge

Level control in the splitter boxes helps maintain balanced routing of influent wastewater in the primary sedimentation process where 50 to 70 percent of the suspended solids are removed, and in the secondary sedimentation process where remaining suspended solids are removed.

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