Heat drying occurs when heat from direct or indirect dryers is used to evaporate water from wastewater solids. A major advantage of heat drying versus other biosolids improvement methods is that heat drying is ideal for producing Class A biosolids.
The biosolids technology fact sheet for heat drying provides:
- A description of heat drying
- Applicability to wastewater treatment plants
- Advantages and disadvantages heat dryinig
- Design criteria
- Performance capabilities and data
- Operation and maintenance information
- Costs
- Fact Sheet: Heat Drying (PDF)(13 pp, 423 K, September 2006, EPA 832-F-06-029)