Sludge level
There are several areas within a wastewater treatment facility where solids settle and are subsequently removed as sludge. These include hoppers, holding tanks, gravity thickeners, and other sludge collection systems. Sludge level is monitored to control against incomplete discharge or dilution of the sludge.
Challenge
Non-contact measurement is often preferred since sensors are located above the process fluid and beyond direct contact with the sludge. Sensors of contact technologies should be single rod types to minimize material buildup - or bridging - that occurs in twin rods configurations.
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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