Title:
凝集剤および水処理方法
Document Type and Number:
Japanese Patent JP6657999
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To perform a water treatment for subjecting a subsequent stage to membrane separation treatment, in particular, osmosis membrane separation after treatment object water containing organic substances, in particular treatment object water containing high-polymer organic substances derived from biological metabolism is subjected to coagulation treatment or coagulation, solid-liquid separation treatment, where the water treatment is stable and efficient over a long period by subjecting high-polymer organic substances such as polysaccharides derived from biological metabolism to an efficient coagulation treatment in a small amount of added coagulant, and by preventing a fouling of the irreversibility or a decrease in water permeability of a separation membrane on the subsequent stage.SOLUTION: A coagulant containing aromatic polyamide particles or a dispersion liquid or a solution of aromatic polyamide particles is used where the particle sizes of the aromatic polyamide particles are 10 μm or less.SELECTED DRAWING: Figure 2
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Inventors:
Akihiro Fujii
Takahiro Kawakatsu
Takahiro Kawakatsu
Application Number:
JP2016012646A
Publication Date:
March 04, 2020
Filing Date:
January 26, 2016
Export Citation:
Assignee:
Kurita Water Industries Ltd.
International Classes:
B01D21/01; B01D61/02; B01D61/04; C02F1/44; C02F1/56
Domestic Patent References:
| JP3864817B2 | ||||
| JP2009056454A | ||||
| JP2005219986A |
Attorney, Agent or Firm:
Tsuyoshi Shigeno
Takayuki Shigeno
Takayuki Shigeno