Your web browser is out of date.

Update your browser for better security, speed and to get the best experience on this website.

Update your browser

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

Simulation of rotary dryer operation, Dynamis Source: Dynamis /

Simulation of rotary dryer operation, Dynamis

A simulation of rotary dryer operation, produced by Dynamis.

Drying features and blogs

Blog eu biosolids disposal header
Blog

Biosolids vs sewage sludge

Biosolids are usually considered to be the useful fraction of the sewage sludge. They are generally higher in solids concentration and lower in pathogen content, having gone through a stabilisation process such as chemical dosing, digestion and/or drying.

Read article

More Drying topics…

More process and operation topics…