Filling for percolating filters for biological waste water purif

Details Filling for percolating filters for biological waste water purif Filling for percolating filters for biological waste water purif

1983-02-17

1984-05-29

Castel, Benoit

Liquid purification or separation

With gas-liquid surface contact means

210505, 261DIG72, B01D 3904, C02F 304

Patent

active

044513623

ABSTRACT:
A filling for a percolating filter for biological purification of waste water includes a plurality of flexible, irregularly touching, randomly arranged plastic strips up to 8 cm in width and several meters in length twisted together and suspended from a support over the height of the filter tank. The strips may have a maximum thickness of 30-100 .mu.m and a minimum thickness of 10-60 .mu.m, varying in such thicknesses over their width. The strips may be residue edge portion cuttings severed from the production of continuously produced sheet materials.

REFERENCES:
patent: 3238124 (1966-03-01), Burton
patent: 3407935 (1968-10-01), Burton
patent: 4088571 (1978-05-01), Helgesson
patent: 4167482 (1979-09-01), Muller
patent: 4181604 (1980-01-01), Onishi et al.
patent: 4219420 (1980-08-01), Muller

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