IP Library › Patent Application 12909664
Patent Application
App. No. 12/909,664

TERTIARY FILTER

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Quick Facts
Patent No.
US None
App. No.
12/909,664
Abstract

A filter cloth of long pile fiber bundles is used as a tertiary filter in a wastewater processing method. The filter may be backwashed by a rotating suction head which does not touch the filter cloth. A combination of countercurrent and horizontal flow dislodges entrained solids from the filter cloth. Mounting of the filter media as modular components permits increased capacity within a single tank while avoiding down time in changeover of filter media.

Claims (19)

1 - 21 . (canceled)

22 . A modular filter assembly comprising a peripheral frame, said peripheral frame defining an outlet for filtered wastewater at an upper end thereof;

a first supporting backing plate attached to said peripheral frame to form a front face; and a second supporting backing plate attached to said peripheral frame to form a back face of said modular filter assembly;

said first backing plate forming said front frame being covered with a first filter media;

said second backing plate forming said rear frame being covered with a second filter media;

the first and second filter media; in combination with said peripheral frame defining an enclosed space into which filtered wastewater can accumulate;

said outlet being in fluid communication with said enclosed space into which filtered wastewater can accumulate.

23 . The modular filter of claim 22 , wherein the first and second filter media each comprises a plurality of fiber bundles attached to a foraminous backing.

24 . The modular filter of claim 22 , wherein the peripheral frame further comprises a track which is sized and shaped so as to be receivable by channels mounted in a tank for receiving wastewater.

25 . A tank for receiving wastewater comprising a modular filter according to claim 22 .

26 . The tank of claim 25 , comprising a plurality of the modular filter according to claim 22 .

27 . A tank for receiving wastewater, the tank comprising a plurality of channels, said channels being sized and shaped to receive the modular filter according to claim 22 .

28 . The tank of claim 27 , wherein the channels are sized and shaped to permit the peripheral frame of the modular filter elements to be slidingly engaged by, and slidingly removed therefrom.

29 . The modular assembly of claim 22 , wherein the peripheral frame further comprises tracks.

30 . The modular assembly of claim 22 , wherein at least one of the first and second backing plates comprises a material selected from the group consisting of metal and plastic.

31 . The modular assembly of claim 30 , wherein the backing plate comprises a grid.

32 . The modular assembly of claim 31 , wherein the filter media is stretched over the grid and attached at points intermediate its periphery.

33 . The modular assembly of claim 31 , wherein the filter comprises a plurality of fiber bundles attached to a fabric backing.

34 . The modular filter assembly of claim 22 , further comprising a lifting hook attached to the peripheral frame.