Title:
METHOD FOR DECOLORIZING INDUSTRIAL WASTE LIQUID
Document Type and Number:
WIPO Patent Application WO/2024/075518
Kind Code:
A1
Abstract:
Provided is a method for decolorizing an industrial waste liquid, said method comprising: a first precipitation treatment step for mixing an iron-based inorganic flocculant and a cationic polymer flocculant into an industrial waste liquid and performing solid-liquid separation to extract a first supernatant liquid; an alkali treatment step for mixing an alkaline agent into the first supernatant liquid to adjust the pH of the first supernatant liquid to 8 or higher; and a second precipitation treatment step for mixing an iron-based inorganic flocculant into the pH-adjusted first supernatant liquid, then mixing an alkaline agent to adjust the pH to 6 or higher, then mixing a cationic polymer flocculant, and performing solid-liquid separation to extract a second supernatant liquid.
Inventors:
ADACHI TETSUYA (JP)
NAKANO JUNJI (JP)
NAKANO MASAO (JP)
NAKANO JUNJI (JP)
NAKANO MASAO (JP)
Application Number:
PCT/JP2023/033958
Publication Date:
April 11, 2024
Filing Date:
September 19, 2023
Export Citation:
Assignee:
CHUGOKU KANKYO CO LTD (JP)
International Classes:
B01D21/01; C02F1/52; C02F1/56
Foreign References:
| JP2011050900A | 2011-03-17 | |||
| JP2008055277A | 2008-03-13 | |||
| JPH06165993A | 1994-06-14 | |||
| JPS54156341A | 1979-12-10 | |||
| JPH0623369A | 1994-02-01 | |||
| JP2001269504A | 2001-10-02 | |||
| JPH09174061A | 1997-07-08 |
Attorney, Agent or Firm:
YANAGINO IP, P.C. (JP)
Download PDF: