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Drying

In sludge drying the moisture from sludge is removed as water vapour by heating, rather than being removed as a liquid via mechanical means such as in thickening or dewatering. The sludge is normally dried to solid concentrations above 65% to produce pellets or, at the highest solids concentrations of 90% or more, a powder. Pelleted or powdered sludge is more readily conveyed than the dewatered sludge of higher water content, which exists as large lumps.

Drying related videos

Belt dryer in use at Innsbruck WwTW in Austria, Huber Source: HUBER SE / YouTube

Belt dryer in use at Innsbruck WwTW in Austria, Huber

Huber's animation of sewage sludge drying using a belt dryer at Innsbruck wastewater treatment works.

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Drying features and blogs

PFAS molecule
Blog

How do you solve a problem like PFAS?

PFAS (per- and polyfluoroalkyl substances) are generated from the breakdown of fluorinated polymers. The activation barrier for their breakdown is huge and the only fully commercialised processes possibly capable of destroying PFAS are thermochemical ones.

Read article

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