Method for separating pollutants from liquid

Details Method for separating pollutants from liquid Method for separating pollutants from liquid

1977-11-28

1981-01-20

Castel, Benoit

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210 961, 210723, 210739, 210765, 210786, 210793, 210798, B01D 2324

Patent

active

042461022

ABSTRACT:
In the particular embodiment of the invention described in the specification, a liquid to be purified passes first through a screen, a sand trap, a first sedimentation basin, an aeration basin and a second sedimentation basin, and then through a final purification step for chemical admixture and passage upwardly through a particulate filter bed. The particulate filter material is circulated continuously from the bottom of the filter bed through a washing device and the cleaned particulate material is deposited at the top of the filter bed. Sludge collected from the sedimentation basins and the washing device is treated in thickeners and digesters.

REFERENCES:
patent: 3151187 (1964-09-01), Comte
patent: 3545619 (1970-12-01), Ettlich et al.
patent: 3968034 (1976-07-01), Tymoszczuk
patent: 4060484 (1977-11-01), Austin et al.
patent: 4126546 (1978-11-01), Hjelmner et al.

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