Title:
廃水の処理方法、廃水の処理システム
Document Type and Number:
Japanese Patent JP6728546
Kind Code:
B2
Abstract:
A method for treating wastewater that contains sparingly decomposable BF4 - is provided in which the BF4 - can be more efficiently decomposed on the basis of the BF4 - concentration in the wastewater. The method for treating wastewater according to the present invention is a method for treating wastewater that contains fluorine and sparingly decomposable BF4 -, the method comprising: a fluorine removal step S1 in which free fluorine ions contained in the wastewater are removed; a BF4 - measurement step S2 in which the concentration of BF4 - in the wastewater from which the free fluorine ions have been removed is measured; and a decomposition step S3 in which the BF4 - is decomposed on the basis of the BF4 - concentration measured in the BF4 - measurement step S2. The method is characterized in that in the BF4 - measurement step S2, the pH of the wastewater is regulated to 4 or less and the BF4 - concentration is measured and that in the decomposition step S3, a polyvalent metal or a salt of the metal is added to the wastewater in an amount determined on the basis of the BF4 - concentration.
Inventors:
Haruo Shibayama
Tsutomu Muraki
Tsutomu Muraki
Application Number:
JP2017508959A
Publication Date:
July 22, 2020
Filing Date:
March 31, 2015
Export Citation:
Assignee:
Sumitomo Metal Mining Engineering Co., Ltd.
International Classes:
C02F1/58
Domestic Patent References:
| JP2014200745A | ||||
| JP2009233605A | ||||
| JP2011027722A | ||||
| JP2107394A | ||||
| JP2011104459A |
Attorney, Agent or Firm:
Masayuki Masabayashi
Hayashi Ichiyoshi
Hayashi Ichiyoshi