Title:
FRESH WATER GENERATION METHOD AND FRESH WATER GENERATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/057188
Kind Code:
A1
Abstract:
To prevent an oxidation degradation of a semipermeable membrane and an increase in bio-fouling therein and avoid a cost increase due to chemicals or the like, in a fresh water generation method in which raw water is subjected to a membrane filtration with a microfiltration/ultrafiltration membrane module and then subjected to a membrane filtration with a semipermeable membrane unit, the membrane filtration in the microfiltration/ultrafiltration membrane module is temporarily stopped, chlorine agent containing water is supplied from a secondary side of the microfiltration/ultrafiltration membrane module to perform counter pressure cleaning of the microfiltration/ultrafiltration membrane module, and thereafter an ammonia compound and/or an amino compound is added to a primary side of the microfiltration/ultrafiltration membrane module to restart the membrane filtration in the microfiltration/ultrafiltration membrane module.
Inventors:
MAEDA TOMOHIRO
Application Number:
PCT/JP2011/074639
Publication Date:
May 03, 2012
Filing Date:
October 26, 2011
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
MAEDA TOMOHIRO
MAEDA TOMOHIRO
International Classes:
B01D65/06; B01D61/58; B01D65/02; C02F1/44
Foreign References:
| JP2008183510A | 2008-08-14 | |||
| JPH0698277B2 | 1994-12-07 | |||
| JPS63100998A | 1988-05-06 | |||
| JP2001079366A | 2001-03-27 | |||
| JP2006305444A | 2006-11-09 | |||
| JP2008029906A | 2008-02-14 | |||
| JP3380114B2 | 2003-02-24 | |||
| JPS59213495A | 1984-12-03 |
Other References:
HIROYUKI YAMAMURA: "Membrane", vol. 28, THE MEMBRANE SOCIETY OF JAPAN, article "Present Situation and Future Problems of Membranes for Effective Utilization Systems of Water Resources", pages: 235
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