Liquid purification or separation – Processes – Treatment by living organism
Patent
1998-07-30
2000-04-11
Upton, Christopher
Liquid purification or separation
Processes
Treatment by living organism
210612, 210631, 210769, 210663, 210912, 210914, 4352625, C02F 328
Patent
active
060484586
ABSTRACT:
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 aid 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 may be removed as a vapor phase in an initial stage of the steam heating and condensed and collected. An aqueous phase of the anaerobic digestate may be treated to remove heavy metals and may be discarded or reused to slurry solid phase incoming to a digester. The solids phase of the anaerobic digestate may be acidified to solubilize heavy metals which are recovered by electrodeposition from the solution. The depleted residue can be neutralized and disposed of.
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Vogt Gregory M.
Vogt Hubert S.
Walter Herman K.
Eastern Power Limited
Upton Christopher
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