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Reagent dosing

Chemical conditioning through reagent dosing is designed to coalesce (or agglomerate) the smaller sludge particles (1−10 µm) to produce larger ones, and to reduce the colloidal (the sub-0.1 µm particle/macromolecular size range) content of the particulate matter. This then increases both the particle sedimentation rate and the permeability of the cake − the solids sediment formed from the particles. In doing so, the efficiency of the downstream thickening and dewatering processes is increased.

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Reagent dosing features and blogs

Blog sludge worth shutterstock 16047946
Blog

How much is sludge worth?

The UK regulator OFWAT has introduced legislation based on the notion of sludge as a resource. Its value is often expressed in terms of calorific content, and the phosphate is also potentially recoverable. But how exactly should sludge value be quantified?

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