Apparatus and process for biological wastewater treatment with c

Liquid purification or separation – Processes – Treatment by living organism

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Details

210610, 210614, 210630, 210903, 210906, C02F 330

Patent

active

056267541

ABSTRACT:
An activated sludge treatment process and apparatus are provided for denitrification of a trickling filter plant effluent in which the nitrate nitrogen to BOD5 ratio can be maintained at less than or equal to 0.18 without the use of a nitrate monitor to control supplemental dosing with carbonaceous organic compounds or their salts. The apparatus is equipped with a turbidity meter, a phosphate monitor, and with a substrate storage tank for the addition of carbonaceous organic substrate. The substrate is added immediately at the end of the oxic phase and is continued until phosphate release is detected. Accordingly, the phosphate monitor functions as an indicator of nitrate respiration in the anoxic phase.

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patent: 5013442 (1991-05-01), Davis et al.
patent: 5076928 (1991-12-01), Ballnus
patent: 5242592 (1993-09-01), Ballnus
patent: 5342522 (1994-08-01), Marsman et al.
patent: 5482630 (1996-01-01), Lee et al.

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