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Paddle dryers

Paddle dryers are based on externally-heated paddles (or blades) rotating in the mass of sludge solids. There are normally either two or four sets of blades which rotate together to continuously cut into and stir the sludge solid lumps into smaller particles to continuously replenish the drying surface. Paddle dryers can operate without back-mixing since the agitation provided by the rotating paddles is sufficient to avoid the formation of sticky sludge.

Paddle dryers related videos

Paddle dryer for sludge treatment Source: Klooth Alex / YouTube

Paddle dryer for sludge treatment

A video to demonstrate a paddle dryer for sludge in operation.

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Paddle 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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