| 摘要 |
<P>PROBLEM TO BE SOLVED: To eliminate fouling (clogging) as a result of adsorption and accumulation of organic matter included in untreated water onto a membrane surface in a water purification system using a reverse osmosis membrane. <P>SOLUTION: The water purification system is 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. <P>COPYRIGHT: (C)2013,JPO&INPIT |
