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

Rotary drum dryers

Rotating drum – or rotary – dryers consist of a drum, several metres in length and ~2 m in diameter, which is inclined at 3–4° to the horizontal and rotates around its axis at a speed of 4-8 RPM. The drum is fitted with internal structures (fins, paddles or blades) which agitate and break up the sludge solids and help them pass along the length of the drum while being dried by a stream of warm air passing along the length of the drum.

Rotary drum dryers 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.

Rotary drum dryers features and blogs

Blog eu biosolids disposal header

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 Rotary drum dryers topics…

More process and operation topics…