WATER PURIFICATION SYSTEM AND WATER PURIFICATION METHOD

WIPO Patent Application WO/2013/005369

A1

The present invention addresses the issue of fouling (clogging up) of a water purification system using a reverse osmosis membrane by attachment/accumulation on a membrane surface of organic matter contained in untreated water. The present invention provides a water purification system characterized by having a closed channel that circulates circulating water that does not contain substances that cause fouling, on the downstream side and separated from the untreated water by a semipermeable membrane. Substances that cause fouling can be prevented from coming in contact with the reverse osmosis membrane and fouling can be reduced, by reverse osmosis membrane processing of the circulating water having a low organic matter concentration, after water is collected from the untreated water containing organic matter into the circulating water via a forward osmosis membrane that is difficult to foul.

JP2006239530	MANUFACTURING METHOD AND MANUFACTURING APPARATUS OF BALLAST WATER FOR SHIP
JP6444606	Water treatment equipment
WO/2004/096715	DEVICE FOR THE ELECTROLYTIC AND OXIDATIVE TREATMENT OF WASTEWATERS, CONDUCTING FILTRATION MEMBRANES USED THEREFOR, PRODUCTION THEREOF, AND METHOD FOR THE TREATMENT OF WASTEWATERS BY MEANS OF SAID INSTALLATION AND/OR SAID FILTRATION MEMBRANES

NAKANO KEIKO (JP)

PCT/JP2012/003451

January 10, 2013

May 28, 2012

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HITACHI LTD (JP)
NAKANO KEIKO (JP)

C02F1/44; B01D61/00; B01D61/08; B01D61/58

JP2005279540A	2005-10-13
JPS5898199A	1983-06-10
JP2010207748A	2010-09-24

INOUE, Manabu et al. (JP)
Manabu Inoue (JP)

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