Digester level
The principal biological methods employed in wastewater treatment for sludge stabilization are aerobic and anaerobic digestion. The former utilizes aerobic bacteria to convert organic matter and stabilize biosolids while the latter accomplishes this goal with anaerobic bacteria working without oxygen. Both processes are monitored for level within their tanks.
Challenge
The gas-injection and mechanical stirring systems of anaerobic process, and the aeration systems of aerobic process, create large amounts of foam that have traditionally hampered mechanical level controls. Recent developments in radar technologies have advanced measurement accuracy despite the foam content of these digesters.
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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