Liquid purification or separation – With gas-liquid surface contact means
Patent
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
Castel Benoit
Felix Schoeller Jr. GmbH & Co. KG
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