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Gravity thickeners

Gravity thickening increases the solids concentration by allowing the particles to settle to the base of a vessel, producing a concentrated (thickened) solids stream at the vessel base and a supernatant (diluted) stream at the surface. The thickener has the same design features as a primary sedimentation tank used for wastewater treatment, and most often has cylindrical geometry.

Gravity thickeners related videos

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

Gravity thickener principles (Indian School of Mines)

Video to demonstrate what gravity thickeners and the principles of how they work.

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Gravity thickeners features and blogs

Fig. 4.  SP filtrate and acidified sludge samples
Feature

Phosphorus recovery by sludge acidification and dewatering

A pilot-scale Danish study of phosphorus extraction from acidified anaerobic and aerobic sludge samples has revealed removal to be more effective from anaerobic sludges, even though the digested sludge alkalinity increases the total acid demand.

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