WATER TREATMENT METHOD, WATER TREATMENT APPARATUS, METHOD FOR RECOVERING PURIFIED WATER, AND PURIFIED WATER RECOVERING APPARATUS

摘要

This invention provides a water treatment method which can produce a treated water having a given level of quality. The water treatment method comprises allowing a raw water to flow into a membrane separation module using a reverse osmosis membrane to separate the water into a treated water and a concentrated water. The water treatment method is characterized in that the impurities of the raw water, the treated water or the concentrated water are measured and the quality of the treated water is regulated based on the measured impurity value.