Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Responsive to fluid flow
Patent
1977-06-03
1979-02-06
Hart, Charles N.
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Responsive to fluid flow
210 15, 210195S, 210199, 210220, 210528, C02C 108, C02C 510, B01D 2110
Patent
active
041383281
ABSTRACT:
An apparatus for the purification of waste water in accordance with the activated-sludge process which comprises a buffer vessel downstream of a settling tank with a mechanical cleaner, at least one oxidation trough or vessel provided with at least one aerating device and a device for subdividing the input into the latter receptacle in the region of the aeration device, an afterclarifying receptacle and a sludge recycling path from the afterclarifier. The buffer vessel is provided in addition with an aeration device and the waste water or sewage is treated therein to partially reduce its biological oxygen demand. Between the buffer vessel and the oxidation receptacle, a high-efficiency stage is provided which is formed with an aeration device. The sludge recycle from the afterclarifier is introduced into the high-efficiency receptacle which is provided in the region of the aeration device of the latter with a distributor for the recycled sludge and a distributor for the discharge from the buffer vessel.
REFERENCES:
patent: 3053390 (1962-09-01), Wood
patent: 3412017 (1968-11-01), Abson
patent: 3415379 (1968-12-01), Thayer
patent: 3703462 (1972-11-01), Smith
patent: 3735870 (1973-05-01), Uden
patent: 3764524 (1973-10-01), Stankewick
patent: 3776841 (1973-12-01), Torpey
patent: 3897334 (1975-07-01), Murphy
patent: 3920550 (1975-11-01), Farrell
patent: 3977965 (1976-08-01), Tholander et al.
patent: 4002561 (1977-01-01), Traverse
Wasser, Luft, und Betrieb, vol. 20, 196, pp. 298-300, 1976.
Chemical and Process Technology, Encyclopedia, Consicline, Editor, McGraw-Hill Book Co., N. Y. 1974.
Hart Charles N.
Ross Karl F.
Therkorn Ernest G.
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