A nitrogen removing method and its device

Japanese Patent JP5995242

B2

PROBLEM TO BE SOLVED: To provide, by targeting a method for removing a nitrogen component included within treatment target water based on the electrochemical reduction thereof, a method enabling a stable treatment for removing the nitrogen component while an efficient reaction control is being executed.SOLUTION: In a method for removing, via electrolysis, a nitrogen component within treatment target water without partitioning the gap between an anode and a cathode with a diaphragm, the concentration of the nitrogen component within the treatment target water is measured at a nitrogen component removal treatment step, and after a main reaction mechanism specific to the cathode has been estimated based on the concentration measurement results, the addition of a specified chemical required for the nitrogen removal treatment is controlled depending on the estimated reaction mechanism. Alternatively, the pH of the treatment target water is maintained within a specified range by using a pH adjuster, and after a main reaction mechanism specific to the cathode has been estimated based on the quantity of the pH adjuster used at a nitrogen component removal treatment step, the addition of a specified chemical is controlled depending on the estimated reaction mechanism.

Tsutomu Muraki
Haruo Shibayama

JP2013134508A

September 21, 2016

June 27, 2013

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Sumitomo Metal Mining Engineering Co., Ltd.

C02F1/461; C02F1/58

JP2012040524A
JP2005144366A
JP2004344819A
JP2003225672A
JP2004344820A
JP2004097950A
JP2006263588A
JP2010530300A
JP2007105673A
JP2013252508A
JP2014040629A

WO2005097686A1

Akira Koike
Seiji Iga
Toshiya Fujii
Yusei Atsuya

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