Process for biological waste water treatment

Details Process for biological waste water treatment Process for biological waste water treatment

1992-10-13

1993-09-07

Wyse, Thomas

Liquid purification or separation

Processes

Treatment by living organism

210610, 210614, 210630, 210906, C02F 330

Patent

active

052425924

ABSTRACT:
Activated sludge process for biological waste water treatment comprises controlling the supply of oxygen to a single tank reactor in response to the phosphate concentration in the anaerobic phase independent of turbidity. The oxic phase is initiated if the maximum turbidity set point is exceeded in the usual manner. However, if the phosphate concentration exceeds its maximum set point before the turbidity reaches a maximum, then the oxic phase is initiated to end phosphate release. Acetic acid can be added to increase phosphate elimination at the end of the anaerobic phase, prior to switching on the supply of oxygen.

REFERENCES:
patent: 3342727 (1967-09-01), Bringle
patent: 4179366 (1979-12-01), Kaelin
patent: 4333838 (1982-06-01), Ballnus
patent: 4437992 (1984-03-01), Saito et al.
patent: 4650585 (1987-03-01), Hong et al.
patent: 4859341 (1989-08-01), Schreiber
patent: 5076928 (1991-12-01), Ballnus

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