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Gravity belt thickeners

Gravity belt thickening (GBT) thickens sludge by allowing the water (or filtrate) to drain from the sludge under gravity through a permeable medium (a recirculating conveyor belt) on which the sludge sits. The sludge solids concentration is increased along the length of a porous belt as water drains through it, the sludge solids forming a layer on the belt surface.

Gravity belt thickeners related videos

Gravity belt thickener, Alfa Laval Source: Alfa Laval / YouTube

Gravity belt thickener, Alfa Laval

A video to demonstrate the workings of the Alfa Laval AS-H gravity belt thickener which can be used for municipal sludge, and industrial sludge that flocculates.

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Gravity belt 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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