Hi Sue!
The waste stream is separated into 3 major catagories.
1) kitchen scraps (never plated for a guest)
2) recycables
3) food waste
The solid waste facility at WDW is lovingly pronounced "The MURF" but it's actual name is MRF (Materials Recovery Facility).
The MRF is a 110-ton-per-day facility designed to sort and process various grades of paper, including high grade and cardboard; and containers (plastic, glass, steel, and aluminum). All processing operations are enclosed in a pre-engineered metal building with sorting rooms, full employee facilities, visitor viewing and educational exhibit acres.
The MRF is designed to serve the unique waste stream of the Disney World resort and surrounding facilities. The site consists of a 3,600sf air-conditioned office space with lunch room, conference room, restrooms, and showers are included in the 32,000 sf buildings. Also, a scale and scalehouse are on site.
Mechancial sorting permits the recovery of many ferrious and non-ferris materials to be sold into the recycling raw materials markets. Kitchen waste is composted for use by WDW horticulturalists, and food wastes and non recyclables are incinerated and/or landfilled.
HTH