Moreover, traditional discard processing only pays emphasis on material recovery to call back waste residual, leaving the environmental pollution ignored.

Oil shale waste, a waste residual by carbonization or burning of oil shale, would seriously pollute environment and occupy large area of useful land without rational reuse.

Keppel Seghers' Waste-to-Energy plants incorporate all proprietary technology related to an integrated waste recovery concept for treating the residual waste fraction.