Method of biologically removing nitrogen and system therefor

Details Method of biologically removing nitrogen and system therefor Method of biologically removing nitrogen and system therefor

1998-09-28

1999-12-07

Upton, Christopher

Liquid purification or separation

With gas-liquid surface contact means

With separator

2101951, 210617, 210631, 210903, C02F 306

Patent

active

059977361

ABSTRACT:
In a method of biologically removing nitrogen and a system therefor according to the present invention, by utilizing the characteristics of AH bacteria as being nitrifying bacteria of nitrous acid type for displaying high activity at the high concentration of ammonium nitrogen and the characteristics of AL bacteria as being nitrifying bacteria of nitrous acid type for displaying high activity at the low concentration of the ammonium nitrogen, in the nitrifying process, operations capable of obtaining the maximum nitrifying speed in accordance with the concentration of the ammonium nitrogen can be performed, and the nitrifying reaction of nitrous acid type for producing nitrous acid as being an intermediate oxide material of the ammonium nitrogen can be performed.

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Suwa, Y. et al., "Ammonia-Oxidizing Bacteria with Different Sensitivities to (NH.sub.4).sub.2 SO.sub.4 in Activated Sludges," Water Research, Jul. 28, 1994, No. 7, pp. 1523-1532.

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