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Disc dryers

Disc dryers operate in a manner similar to paddle dryers. A series of vertical discs or rings mounted on a single shaft within a cylindrical vessel rotate in a mass of sludge passing through the vessel. The shaft and discs are externally heated by steam or hot oil. For disc dryers, unlike paddle dryers, a proportion of the dried product sludge is often recycled to avoid the formation of the sticky phase.

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Disc dryers features and blogs

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Feature

Anaerobic digestion optimization through thermal hydrolysis pre-treatment

Pre-treatment of sludge by thermal hydrolysis upstream of anaerobic digestion is used to improve AD efficiency. A study looked at (pre-)commissioning data for a full-scale AD installation undergoing upgrading with TH to assess the basis for optimisation.

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