WATER TREATMENT METHOD

摘要

The present invention provides a water treatment method for supplying clean water by sterilizing not only the inside of a water tank but also a filter film using sterilizing water. The water treatment method comprises the followings: a) a step for discharging water inside a storage unit for storing the water filtered by a filter unit; b) a step for supplying sterilizing water to the storage unit for sterilizing; and c) a step for discharging the sterilizing water inside the storage unit to the outside. The storage unit is formed of first and second storage tanks which store water at different temperatures, and are connected to each other using a connection line. The water stored inside the first and second storage tanks is discharged to a water outlet through multiple water collecting lines. A water discharging line is installed to discharge the sterilizing water inside the first and second storage tanks. If the sterilizing water in the storage unit is discharged through the water discharging line, the sterilizing water is firstly discharged through the water collecting line which is installed on the lower height among water collecting lines connected to the storage tank, and the sterilizing water is secondly discharged through the water collecting line which is installed on the higher height among water collecting lines connected to the storage tank.