Title:
FRESH WATER GENERATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2013/058063
Kind Code:
A1
Abstract:
[Problem] To lessen the number of operations for cleaning a second semipermeable membrane with a chemical or the frequency of replacement of the membrane in a fresh water generation system in which biotreaetd water obtained by biotreating an organic wastewater is filtered with a first semipermeable membrane and the concentrate is mixed with seawater and then filtered with the second semipermeable membrane.
[Solution] The present invention is a fresh water generation system (1) equipped with: a first semipermeable-membrane device (9) in which biotreated water obtained by biotreating an organic wastewater is filtered with a first semipermeable membrane (8) to thereby separate the biotreated water into a filtrate and a concentrate; and a second semipermeable-membrane device (13) in which the concentrate from the first semipermeable-membrane device (9) is mixed with seawater and the mixture is filtered with a second semipermeable membrane (14). The first semipermeable membrane (8) is equal to the second semipermeable membrane (14) in the tendency of the water-treating microorganism to adhere thereto, or the water-treating microorganism more readily adheres to the first semipermeable membrane (8) than to the second semipermeable membrane (14).
Inventors:
NOTO KAZUHIKO (JP)
KITAMURA KOTARO (JP)
OKAWA YUSUKE (JP)
TAKABATAKE HIROO (JP)
KITAMURA KOTARO (JP)
OKAWA YUSUKE (JP)
TAKABATAKE HIROO (JP)
Application Number:
PCT/JP2012/074436
Publication Date:
April 25, 2013
Filing Date:
September 24, 2012
Export Citation:
Assignee:
HITACHI PLANT TECHNOLOGIES LTD (JP)
TORAY INDUSTRIES (JP)
TORAY INDUSTRIES (JP)
International Classes:
C02F1/44; B01D61/58; B01D71/16; B01D71/56; C02F1/76; C02F3/12; C02F9/00
Domestic Patent References:
| WO2011077815A1 | 2011-06-30 | |||
| WO2011021415A1 | 2011-02-24 |
Foreign References:
| JP2004130233A | 2004-04-30 | |||
| JP2010149100A | 2010-07-08 | |||
| JP4481345B1 | 2010-06-16 |
Other References:
See also references of EP 2769961A4
Attorney, Agent or Firm:
ISONO Michizo (JP)
Michizo Isono (JP)
Michizo Isono (JP)
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Claims:
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