SLUDGE PRETREATMENT APPARATUS, SLUDGE THICKENING APPARATUS AND SLUDGE THICKENING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a sludge pretreatment apparatus, a sludge thickening apparatus and a sludge thickening method, capable of thickening efficiently organic sludge containing protein by using a screw press machine.SOLUTION: A sludge thickening apparatus 10 includes: a sludge supply part 2 for supplying sludge; a sludge pretreatment apparatus 1 constituted of a pre-filtration part 3 for transferring the supplied sludge, and simultaneously subjecting it to gravity filtration and compression filtration, and a microwave irradiation part 4 for irradiating the filtered sludge with a microwave; and a screw press machine 12.SELECTED DRAWING: Figure 4