Water-soluble, biodegradable filter, and process of using same

Details Water-soluble, biodegradable filter, and process of using same Water-soluble, biodegradable filter, and process of using same

1998-01-21

1999-07-13

Smith, Duane S.

Gas separation: processes

Filtering

55421, 55522, 55528, B01D 4600

Patent

active

059221100

ABSTRACT:
A water-soluble, biodegradable filter medium for removing entrained solid and/or liquid particles from an air stream, and a method of use thereof are disclosed. The filter medium is a solid solution of starch and a biodegradable, water-soluble synthetic polymer. After use, the filter medium is disposed of in an environmentally sound fashion. In particular, the filter medium is dissolved in water and the solid and/or liquid particles collected thereon are removed from the resulting aqueous solution of starch and polymer by decantation and the polymer and starch biodegraded using a conventional biological water treatment process.

REFERENCES:
patent: 3616603 (1971-11-01), Warner
patent: 5095054 (1992-03-01), Lay et al.
patent: 5308663 (1994-05-01), Nakagawa et al.
patent: 5478386 (1995-12-01), Itoh et al.
patent: 5702516 (1997-12-01), Spangler
patent: 5783505 (1998-07-01), Duckett et al.
patent: 5817159 (1998-10-01), Cahill et al.

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