Classifying – separating – and assorting solids – Plural – diverse separating operations – Including electrostatic
Patent
1976-01-30
1978-03-21
Halper, Robert
Classifying, separating, and assorting solids
Plural, diverse separating operations
Including electrostatic
209138, 71 64JC, 241DIG38, B03B 700
Patent
active
040798372
ABSTRACT:
A method for the separation of components of solid waste which has been treated by thermal explosive decompression followed by biodegradation (also hereinafter referred to as composting) is presented. The explosive decompression and composting pretreatment before separation presents a granular and inoffensive finely-divided product mixed with less-fragmented non-biodegradable materials such as plastic, metals and other substances. The method first separates the finely-divided product from the waste to leave a first residue, then magnetically separates any magnetic components from the first residue to leave a second residue, and then separates by gravity flotation any plastic components from the second residue, each step being carried out successively without interruption for further treatment of the waste.
A system is described which separates the biodegradable and fine residues first, followed by the separation of other, more valuable components from each other at later stages of separation.
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Grube Kenneth E.
Harrington James V.
Harrington Vincent E.
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