Sediment and sludge dewatering by vacuum bag method

Details Sediment and sludge dewatering by vacuum bag method Sediment and sludge dewatering by vacuum bag method

2006-12-15

2008-11-25

Rinehart, Kenneth B (Department: 3749)

Drying and gas or vapor contact with solids

Process

Mechanical liquid removal

C034S397000

Reexamination Certificate

active

07454847

ABSTRACT:
Dredged sediment or sludge dewatering by vacuum bag method preferably includes a foundation, at least one sediment enclosure, a porous media spacer, an air impermeable sheet, and a vacuum source. The foundation may be air permeable or impermeable. The sediment enclosure is filled with sediment or sludge. The porous media spacer is placed against at least one perimeter surface of the sediment enclosure. At least one drain tube may be used to drain water. The air impermeable sheet is placed over the at least one sediment enclosure and the porous media spacer and the perimeter is sealed to an impermeable foundation. A vacuum is applied to the porous media spacer to remove water. A second embodiment uses a second air impermeable sheet. A third embodiment uses a barge. A fourth embodiment discloses a composite vacuum bag. A fifth embodiment discloses the composite vacuum bag with inflatable flotation.

REFERENCES:
patent: 4483641 (1984-11-01), Stoll
patent: 4606674 (1986-08-01), Capron
patent: 4984594 (1991-01-01), Vinegar et al.
patent: 2006/0102565 (2006-05-01), Alford
Vacuum Consolidation, ISSMFE-TC-17 (4) pp. by Menard.
Dredging and Management of Dredged Material, GEO Institute by Meegoda, et al. Jul. 16, 1997 (18) pages.
Vacuum Consolidation, GEO Odyssey ASCE/Virginia Tech, Jun. 9, 2001 by Masse, et al. (23) pages.

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