Definition: Secondary waste (or treatment residues)

Category: Environment

Waste from secondary sources, i.e. waste generated in a process that is known as a waste treatment operation.  Includes residual materials originating from recovery and disposal operations, such as incineration and composting residues. 

N.B.: In accordance with the definition of waste, waste from sewage treatment (i.e. sewage sludge) is considered as primary waste.