Title:
METHOD AND DEVICE FOR CLARIFYING INDUSTRIAL WATER
Document Type and Number:
WIPO Patent Application WO/2017/130456
Kind Code:
A1
Abstract:
A method and a device for clarifying industrial water are provided with which it is possible to highly clarify industrial water with a small amount of a coagulant without using any inorganic coagulant required to be added in a large amount for clarification, such as PAC, aluminum sulfate, or ferric chloride, in particular, to obtain treated water of quality suitable for RO membrane treatment. The method for clarifying industrial water comprises adding an acidic colloidal solution of a melamine-formaldehyde resin to the industrial water to conduct a coagulation treatment and thereafter filtering the industrial water. The water having undergone the coagulation treatment can be directly filtered with a pressure-type or gravity-type filtration device or with a microfiltration membrane module or ultrafiltration membrane module without conducting a solid/liquid separation with a sedimentation separator or floatation separator.
Inventors:
OOI YASUHIRO (JP)
TADA KEIJIROU (JP)
FUJII AKIHIRO (JP)
TADA KEIJIROU (JP)
FUJII AKIHIRO (JP)
Application Number:
PCT/JP2016/077637
Publication Date:
August 03, 2017
Filing Date:
September 20, 2016
Export Citation:
Assignee:
KURITA WATER IND LTD (JP)
International Classes:
B01D21/01; B01D61/04; B01D61/16; B01D61/58; C02F1/44; C02F1/56
Foreign References:
| JP2009226373A | 2009-10-08 | |||
| JP2014034006A | 2014-02-24 | |||
| JPS3812517B1 | ||||
| JPH02169091A | 1990-06-29 | |||
| JP2006007208A | 2006-01-12 |
Attorney, Agent or Firm:
SHIGENO, Tsuyoshi et al. (JP)
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