Two zone process for biological treatment of waste water

Details Two zone process for biological treatment of waste water Two zone process for biological treatment of waste water

1978-05-11

1980-03-11

Castel, Benoit

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210 13, 210 14, 261 93, C02C 510

Patent

active

041927400

ABSTRACT:
A process is provided for treating waste water biologically and clarifying the biologically treated water; considerable economic advantage is obtained by conducting both the biological treatment and the clarification of biologically treated water in a single vessel rather than in separate vessels; it is further found possible to treat in this system water containing much higher concentration of waste; in the process the supply of oxygen to the biological reaction zone is carefully monitored to meet the biological oxygen demand and avoid the occurrence of undissolved oxygen in the form of gas bubbles in the biological reaction zone or the clarification zone; there is further provided improvements in oxygen dissolving devices rendering them especially suitable for the two zone treatment.

REFERENCES:
patent: 3482694 (1969-12-01), Rice et al.
patent: 3615025 (1971-10-01), Rice et al.
patent: 3643403 (1972-02-01), Speece
patent: 3788476 (1974-01-01), Othmer
patent: 3804255 (1974-04-01), Speece
patent: 3966598 (1976-06-01), Ettelt
patent: 3983031 (1976-09-01), Kirk
patent: 4000227 (1976-12-01), Garrett

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