Title:
Selenium-containing water treatment equipment and selenium-containing water treatment method
Document Type and Number:
Japanese Patent JP6307276
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an apparatus and a method for treating selenium-containing water, in each of which a high selenium removal rate is achieved by a small additional amount of ferrous salt and a generation amount of sludge is reduced.SOLUTION: The apparatus 1 for treating selenium-containing water, includes: an iron reaction tank 12 in which selenium in the selenium-containing water is reduced and agglomerated by the ferrous salt at the temperature of 50-95°C in a pH range of 7.0 or higher and lower than 8.0; a re-agglomeration tank 14 in which an alkali is added to the reduced water obtained in the iron reaction tank so that the pH of the alkali-added reduced water is made equal to 8.0 or higher and lower than 10.0 to re-agglomerate the selenium; and a precipitation tank 18 in which an agglomerated product is separated from the re-agglomerated water obtained in the re-agglomeration tank.
Inventors:
Eiji Imamura
Yuichiro Toba
Yuichiro Toba
Application Number:
JP2014000960A
Publication Date:
April 04, 2018
Filing Date:
January 07, 2014
Export Citation:
Assignee:
Organo Corporation
International Classes:
C02F1/58; B01D21/01; B01D21/08; C02F1/52; C02F1/56; C02F1/70; C02F1/72; C02F9/02; C02F9/04
Domestic Patent References:
| JP2006102559A | ||||
| JP9150164A | ||||
| JP2013202521A | ||||
| JP2013075261A | ||||
| JP2012035221A | ||||
| JP9047790A | ||||
| JP2003190974A | ||||
| JP2009240930A | ||||
| JP49128540A |
Foreign References:
| WO2010110143A1 |
Attorney, Agent or Firm:
Patent Corporation yki International Patent Office