Process for waste water purification

Details Process for waste water purification Process for waste water purification

1981-10-15

1983-02-15

Therkorn, Ernest G.

Liquid purification or separation

Processes

Ion exchange or selective sorption

210665, 210685, 210694, 210703, 210804, C02F 124, C02F 142

Patent

active

043740286

ABSTRACT:
Disclosed is an improved process for purifying waste water in which a waste water containing contaminants, including dispersed solids, water-immiscible organic materials, and metallic cations, is first introduced to a sedimentation zone to remove water-insoluble materials having a density higher than that of water, then to a flotation zone to separate as an upper layer water-insoluble and water-immiscible materials having densities lower than that of water. The waste water stream is then introduced to an adsorption zone, where activated carbon particles are added to adsorb remaining water-insoluble and water-immiscible materials, following which the solids are removed in a liquid-solids separation zone. The aqueous phase from the last zone is then passed through a cation exchange zone to remove cations.

REFERENCES:
patent: 2620926 (1952-12-01), Helbig
patent: 2799645 (1957-07-01), Musgrove
patent: 3118833 (1964-01-01), Reinhardt
patent: 3218253 (1965-11-01), Clarke
patent: 3362534 (1968-01-01), Kay
patent: 3408289 (1968-10-01), Gustafson
patent: 3444079 (1966-11-01), Bowers
patent: 3763040 (1973-10-01), Timpe et al.
patent: 3781201 (1973-12-01), Carmichael
patent: 4146472 (1979-03-01), Treyssac
patent: 4168228 (1979-09-01), Mallatt et al.
patent: 4289505 (1981-09-01), Hardison

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