Device for biological treatment of liquid, especially sewage

Details Device for biological treatment of liquid, especially sewage Device for biological treatment of liquid, especially sewage

1996-04-12

1997-12-16

Upton, Christopher

Liquid purification or separation

With gas-liquid surface contact means

With separator

210194, 2101954, 210629, C02F 308

Patent

active

056980949

ABSTRACT:
A device for the biological treatment of liquids, especially sewage, including at least two compartments between which a vertical wall is inserted so that the compartments communicate with each other by free passages above and below the wall. The liquid to be treated is introduced into the compartments which contain particles which are supports for microorganisms exhibiting a density that is lower than that of the liquid to be treated. A gas is injected into the lower part of one of the compartments in order to establish, in the two compartments, a concurrent, continuous and orderly circulation of the multiphase mixture consisting of the liquid, solid and gaseous phases. In the lower part of the compartment not having gas injection, and above the recovery of the treated liquid, in the region where the change takes place in the direction of the flow passing from one compartment to the other, a system is provided for separating the less dense phases (particles, gas) from the multiphase mixture. The system includes at least two arrays of vertically staggered obstacles arranged across the multiphase flow.

REFERENCES:
patent: 3133017 (1964-05-01), Lambeth
patent: 4137171 (1979-01-01), Yokata
patent: 4230563 (1980-10-01), Roesler
patent: 4253949 (1981-03-01), Hines et al.
patent: 4374730 (1983-02-01), Brahn et al.
patent: 4407718 (1983-10-01), Pollock
patent: 5338445 (1994-08-01), Zumbragel et al.

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