Liquid purification or separation – Processes – Treatment by living organism
Patent
1995-07-10
1997-05-06
McCarthy, Neil
Liquid purification or separation
Processes
Treatment by living organism
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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Green Theodore M.
McCarthy Neil
Schreiber Corporation
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