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Sludge thickening

Sludge  cylindrical sedimentation tank with a galvanised metal platform and railings above it

Introduction to sludge thickening

A number of processes act purely to remove water from the sludge to reduce its volume. As a result, the suspended solids concentration of the sludge is increased, i.e. the sludge becomes consolidated.

These processes are referred to as either thickening or dewatering, depending on the amount of water removed.

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Schematic of intensification of AD by thermal hydrolysis, showing thickening, TH, AD and post-AD DW. Coversion of biogas be CHP engine included.
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Pretty intense: the intensification of sewage sludge processes

Sludge intensification processes increase the sewage sludge solids concentration through thickening/dewatering or the biogas generation by digestion. But at what point do you stop extracting more water from the sludge or enhancing biogas production?

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Gravity thickener principles (Indian School of Mines) Source: Himanshu Srivastav / YouTube

How do thickeners work?

An overview of thickeners and explanation of how they work