Treatment of wastewater

Details Treatment of wastewater Treatment of wastewater

1980-05-12

1981-10-27

Hruskoci, Peter A.

Liquid purification or separation

Processes

Treatment by living organism

210614, 210629, 210 97, 2101951, 210199, 261 29, C02F 322

Patent

active

042972175

ABSTRACT:
A method and apparatus for the treatment of wastewater in which the wastewater is circulated around a system comprising a downcomer and a riser communicating with each other at their lower ends, the level of the wasterwater in the downcomer being maintained above the level of the wastewater in the riser and providing a hydrostatic pressure head which causes circulation of the wastewater around the system at a pre-selected rate, a gas containing free oxygen is supplied to the wastewater as it passes through the downcomer, and the wastewater is pumped from, or form near, the top of the riser back into the downcomer (or vessel communicating therewith) at a position(s) above the highest level to which the wastewater in the downcomer can fluctuate during normal operation of the system when operating at maximum load.

REFERENCES:
patent: 3642615 (1972-02-01), Wieferig
patent: 3804255 (1974-04-01), Speece
patent: 3878097 (1975-04-01), Mochizuki et al.
patent: 3910838 (1975-10-01), kaelin
patent: 4086160 (1978-04-01), Roesler
patent: 4207180 (1980-06-01), Chang
patent: 4253949 (1981-03-01), Hines et al.
Speece, "U-tube Stream Reaeration," Public Works Aug. 1969, pp. 111-113.

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