Review of Drying Requirements and Material Characteristics for High-Temperature Processes

Historically, dryers have been used to produce biosolids products for land application, fertilizer amendment, volume reduction for landfilling, or fuel sources (cement kiln, lime kiln, etc.). With many facilities considering high-temperature processes (HTPs) because of their potential destruction of per- and polyfluoroalkyl substances (PFAS), greater mass reduction and potentially more valuable end products, dryers will be required to pre-dry biosolids for these processes as well.

This Fact Sheet will provide a high-level overview of dryer requirements and considerations for dried biosolids to be used in HTPs.