Process for treatment of wastewater

Details Process for treatment of wastewater Process for treatment of wastewater

1980-01-07

1981-12-08

Wyse, Thomas G.

Liquid purification or separation

Recirculation

210220, 261121R, C02F 172

Patent

active

043046657

ABSTRACT:
A method and apparatus for treating wastewater by circulating it around a system comprising a downcomer and a riser communicating with each other at their lower ends, the level of the wastewater in the downcomer being above the level of the wastewater in the riser and providing a hydrostatic pressure head which causes circulation of the wastewater around the system, supplying a gas containing free oxygen to the wastewater as it passes through the downcomer, and pumping the wastewater up from, or from near, the top of the riser to a part of the downcomer, at or near the top thereof, which has, for at least a part of its length, a cross-sectional area which is less than the cross-sectional area of the remainder of the downcomer below the said part.

REFERENCES:
patent: 3696929 (1972-10-01), Shah
patent: 3840216 (1974-10-01), Smith et al.
patent: 3945918 (1976-03-01), Kirk
patent: 4086160 (1978-04-01), Roesler
patent: 4207180 (1980-06-01), Chang
patent: 4230563 (1980-10-01), Roesler
patent: 4253949 (1981-03-01), Hines et al.
Speece, "U-Tube Stream Reaeration", Public Work, Aug. 1969, pp. 111-113.
Speece et al., "Design of U-Tube Aeration Systems", Journal of the Sanitary Eng. Div., ASCE, Jun. 1970, pp. 715-725.

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