Mechanical and biological treatment allows for waste reduction through screening, sorting and recovering the recyclable materials then compressing them so as to achieve dry and wet separation. The subsequent use of bio-drying, anaerobic and aerobic digestion would depend on the remaining waste characteristics.
Waste to Energy facilities allow a valorisation of high calorific value waste or RDF (Refuse Derived Fuel) produced in mechanical and biological treatments. This greatly limits the amount of waste treated in landfills and thus reduces area size, volume of landfill gas and leachate production.