APPARATUS AND METHOD FOR WASTE RECYCLING AND CONVERSION

摘要

Municipal solid waste is classified as to density as well as size in a perforated inclined trommel through which a gas stream is flowed inwardly through the perforations and downwardly to entrain and remove paper and plastics through the lower end. Ferrous and non-ferrous metals are removed from the residue which is digested anaerobically in two stages with an intermediate steam explosion treatment to expose cellulose fibers coated with lignin. Mercury is removed as a vapor phase in an initial stage of the steam heating and is condensed and collected. The solids phase of the anaerobic digestate is acidified to solubilize heavy metals which are recovered by electrodeposition from the solution. The depleted residue is neutralized and disposed of.