US 7,442,539 B2 · Method and equipment for cultivating anaerobic ammonium-oxidizing bacteria

Abstract

The present invention can feed substrates without waste to generate seed sludge with high bacterial cell concentrations and can start up operation within a short time, in cultivating anaerobic ammonium oxidizing bacteria with ammonium and nitrite as substrates. Equipment for cultivating anaerobic ammonium-oxidizing bacteria, which cultivates, in a cultivation tank, novel anaerobic ammonium-oxidizing bacteria that anaerobically denitrify nitrite and ammonium used as substrates, comprises an ammonium feed device which feeds ammonium at a given concentration into the cultivation tank, a nitrite feed device which feeds nitrite at a given concentration into the cultivation tank, and a control device which controls a feed rate Y of the substrate.

Claims33

Dependent claims

A method for cultivating anaerobic ammonium-oxidizing bacteria capable of denitrifying ammonium and nitrite substrates, the method comprising:

cultivating the bacteria in a cultivation tank;
feeding a substrate into the cultivation tank;
and
controlling a feed rate (Y) of the substrate after the bacteria enters a logarithmic growth phase to satisfy formula (I):
Y=A×exp(K×T) (I)
where Y is a feed rate of the substrate, A is a concentration of the substrate at the start of cultivation, K is a feed constant of the substrate, and T is a number of cultivation days after onset of the logarithmic growth phase.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

11/373,271Filed 13 Mar 2006

Priority

JP 2005-07155814 Mar 2005

Published

US 2006/0205055 A114 Sep 2006

Granted

28 Oct 2008

Term ends

Not estimatedThe source records don’t support an estimate.

Classification7 codes

C12N 1/20
Microorganisms; Compositions thereof ; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of…:…
C12M 41/32
Of concentration: of substances in solution
C02F 3/34
Biological treatment of water, waste water, or sewage: characterised by the microorganisms used
C02F 3/348
Characterised by the microorganisms used: characterised by the way or the form in which the microorganisms are added or dosed

Method and equipment for cultivating anaerobic ammonium-oxidizing bacteria

Life of this patent

Method and equipment for cultivating anaerobic ammonium-oxidizing bacteria

Life of this patent

Abstract

Claims33