Biosolids are nutrient-rich organic materials produced when sludge from either industrial or municipal wastewater treatment facilities are properly treated and processed. After treatment and processing, these residuals can be recycled and applied as fertilizer to improve and maintain productive soils and stimulate plant growth.

In some wastewater treatment applications such as DAF(Dissolved Air Flotation), anaerobic digestion, and traditional municipal wastewater a Uzelac dryer is used for the final drying of the sludge or digestate. The dewatered solids are conveyed to the Uzelac dryer’s inlet, where the drying process begins with a heated airflow coming in contact with the sludge. The airflow carries the product from the dryer into a collection system, where the air and dried product are separated. The product is then conveyed to the storage area. Where desired other operations such as screening and sorting may take place as well.

Drying biosolids in this way help ensure that useful materials are recycled on land and harmful materials are not released to bodies of water.
Examples of Biosolids dried by Uzelac
• Digestate
• Municipal Biosolids
• DAF solids
• Various manures
• Industrial sludge