Title:
水処理方法及び水処理装置
Document Type and Number:
Japanese Patent JP7257908
Kind Code:
B2
Abstract:
To prevent blockage of a separation membrane caused by silica scale in a method for treating raw water containing both silica and aluminum by use of a membrane filtration apparatus having a reverse osmosis membrane or a separation membrane as a nanofiltration membrane, by removing aluminum from raw water without being limited to macroporous ion exchange resins and without using chemicals to regenerate the ion exchange resin.SOLUTION: A water treatment method comprises: a step in which raw water is passed through an ion exchange resin layer that contains at least an anion exchange resin, so as to produce treated water having reduced aluminum concentration; a step of supplying the treated water to a membrane filtration apparatus; and a step in which the treated water is separated into permeate water that passed through the separation membrane, and concentrated water that did not pass through the separation membrane.SELECTED DRAWING: Figure 1
Inventors:
Masaya Sugimoto
Naoyuki Tajima
Chika Chichimo
Naoyuki Tajima
Chika Chichimo
Application Number:
JP2019135968A
Publication Date:
April 14, 2023
Filing Date:
July 24, 2019
Export Citation:
Assignee:
Organo Corporation
International Classes:
C02F1/44; B01D61/04; B01D61/44; B01D61/46; B01D61/48; B01J39/05; B01J39/18; B01J41/05; B01J41/12; B01J47/014; B01J47/02; B01J47/04; B01J49/06; B01J49/07; B01J49/09; B01J49/60; C02F1/28; C02F1/42; C02F1/469; C02F5/00
Domestic Patent References:
| JP2017205703A | ||||
| JP2012223700A | ||||
| JP2019018186A | ||||
| JP2016112530A | ||||
| JP2001113281A | ||||
| JP2014213260A |
Attorney, Agent or Firm:
Akio Miyazaki
Masaaki Ogata
Masaaki Ogata
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