Title:
Waste liquid treatment method, waste liquid treatment equipment and waste liquid reuse method
Document Type and Number:
Japanese Patent JP6340302
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To solve such a problem that as a method for treating waste liquid containing inorganic salt, a method for recovering an acid solution and an alkaline solution from the waste liquid using a bipolar electrodialyzer is known, however when the waste liquid contains noble metal such as silver, a noble metal colloid is formed in the waste liquid, resulting in significant reduction in efficiency for recovering the acid solution and alkaline solution even using the electrodialyzer.SOLUTION: A noble metal-containing alkaline waste liquid treatment method comprises: a filtration step of filtering noble metal-containing alkaline waste liquid, thereby removing and recovering the noble metal contained in the waste liquid; and a recovery step of electrodialyzing the waste liquid after being subjected to the filtration step, thereby recovering the acid solution and alkaline solution. The above problem is solved by the noble metal-containing alkaline waste liquid treatment.SELECTED DRAWING: Figure 1
Inventors:
Watanabe Jun
Ryuichi Yoshida
Hiroyasu Sato
Takanori Kimura
Ryuichi Yoshida
Hiroyasu Sato
Takanori Kimura
Application Number:
JP2014217556A
Publication Date:
June 06, 2018
Filing Date:
October 24, 2014
Export Citation:
Assignee:
Tanaka Kikinzoku Kogyo Co., Ltd.
International Classes:
C02F1/469; B01D61/14; B01D61/44; B01D61/46; B01D61/58; B01D71/02; C02F1/44; C22B7/00; C22B9/02; C22B11/00
Domestic Patent References:
| JP2005504178A | ||||
| JP2004500976A | ||||
| JP63100140A | ||||
| JP2014155900A | ||||
| JP2011020064A |
Attorney, Agent or Firm:
Patent business corporation glory patent office
Yuriko Hamada
Furudate Kutanko
Tomoko Yamazaki
Yuriko Hamada
Furudate Kutanko
Tomoko Yamazaki