Title:
METHOD OF OPERATING REVERSE OSMOSIS MEMBRANE DEVICE, AND REVERSE OSMOSIS MEMBRANE DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/129398
Kind Code:
A1
Abstract:
Provided is a reverse osmosis membrane device capable of stably treating raw water containing many membrane contaminants, such as water that has undergone an MBR treatment, while preventing decreases in the flow rate of the permeate. Also provided is a method of operating the reverse osmosis membrane device. Specifically provided is a method of operating a reverse osmosis membrane device for the treatment of raw water that contains high molecular weight organic matter, wherein the raw water contains high molecular weight organic matter having a molecular weight of 10,000 or greater at a concentration of 0.01 ppm or greater, the reverse osmosis membrane device comprises a spiral-wound reverse osmosis membrane element that satisfies formula (1), below, and the reverse osmosis membrane device operates with a permeate flux of 0.6 m/d or lower. Formula (1): membrane surface area (m2) ≥ n2 × (11/16). Therein, n represents the diameter of the reverse osmosis membrane element diameter (inches).
Inventors:
HAYAKAWA KUNIHIRO (JP)
KAWAKATSU TAKAHIRO (JP)
KAWAKATSU TAKAHIRO (JP)
Application Number:
PCT/JP2014/053471
Publication Date:
August 28, 2014
Filing Date:
February 14, 2014
Export Citation:
Assignee:
KURITA WATER IND LTD (JP)
International Classes:
C02F1/44; B01D61/02; B01D61/12; B01D63/10
Foreign References:
| JP2009240902A | 2009-10-22 | |||
| JP2000288542A | 2000-10-17 | |||
| JP2005111473A | 2005-04-28 | |||
| JPS61185400A | 1986-08-19 | |||
| JPH10230140A | 1998-09-02 |
Attorney, Agent or Firm:
SHIGENO, Tsuyoshi (JP)
Takeshi Shigeno (JP)
Takeshi Shigeno (JP)
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