Aeration tank

Liquid purification or separation – Recirculation – Serially connected distinct treating or storage units

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Details

210199, 210201, 210205, 210220, C02F 320

Patent

active

045459070

ABSTRACT:
An aeration tank comprising a mixing vessel having starting and end zones. The mixing tank has water-jet aeration columns and communicates with a sludge separator provided with an outlet of recyclable sludge communicable with a circulation pump connected through a pressure pipe line to the aeration columns. There is also provided a regeneration chamber communicated with the outlet of recyclable sludge of the sludge separator and with the end zone of the mixing vessel, and a chamber for deoxygenation of the sludge medium having an inlet of waste water and communicating with the regeneration chamber and with the starting zone of the mixing vessel. A suction pipeline of the pump communicates with the chamber for deoxygeneation of the sludge medium and with the starting zone of the mixing vessel. Each aeration column has a converging inlet portion in which the pressure pipeline of the pump having a nozzle is introduced, and an adjacent portion of invariable cross-section accommodating a disperser of oxygen-containing gas. The inlet portion has ports and is provided with a gas-trapping casing immersed in the sludge medium so as to isolate the inlet portion from the outside.

REFERENCES:
patent: 3807565 (1974-04-01), Langston et al.
patent: 4069147 (1978-01-01), Abrams et al.
patent: 4207180 (1980-06-01), Chang
patent: 4246111 (1981-01-01), Savard et al.
patent: 4405456 (1983-09-01), Kinzer et al.
patent: 4442005 (1984-04-01), Breider

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