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Title:
METHOD AND APPARATUS FOR DENITRIFYING NITROGEN-CONTAINING WASTE WATER
Document Type and Number:
Japanese Patent JP2016131928
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a method and apparatus for denitrifying nitrogen-containing waste water which allow a treatment apparatus to be downsized and can stably and efficiently perform partial nitritation and anaerobic oxidation treatment in the same reaction vessel.SOLUTION: A method for denitrifying nitrogen-containing waste water includes: a step (S11) of supplying nitrogen-containing waste water into a reaction vessel accommodating microorganism carriers containing ammonia-oxidizing bacteria and anaerobic ammonia oxidizing bacteria or accommodating the microorganism carriers and activated sludge; steps (S12, S13) of sequentially supplying a gas containing oxygen and a gas containing no oxygen into the reaction vessel to agitate the nitrogen-containing waste water in the reaction vessel and denitrifying the nitrogen-containing waste water by action of the ammonia-oxidizing bacteria and the anaerobic ammonia oxidizing bacteria; and steps (S14, S15) of separating the microorganism carriers, or the microorganism carriers and the activated sludge from treated water and discharging the treated water from the reaction vessel.SELECTED DRAWING: Figure 1

Inventors:
KATSU YOSEI
Application Number:
JP2015008059A
Publication Date:
July 25, 2016
Filing Date:
January 19, 2015
Export Citation:
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Assignee:
SWING CORP
International Classes:
C02F3/34; C02F3/10
Domestic Patent References:
JP2010063987A2010-03-25
JP2004230259A2004-08-19
JP2001017992A2001-01-23
JP2012024707A2012-02-09
Foreign References:
WO2006035885A12006-04-06
Attorney, Agent or Firm:
Axis International Patent Service Corporation