SOUTH DAKOTA Department of
Environment & Natural Resources

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Surface Water

Solids Thickener

picture of a gravity belt thickener

The gravity belt thickener, such as the one on the left, is one way to reduce the amount of water in the biosolids before further treatment. The volume reduction is occurring from the loss of water. Thickening of the biosolids improves digester operation and reduces the cost of sludge digestion.

 

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