| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid purifying apparatus capable of reducing discharge amount of backwashing liquid flowing out during backwashing of a filter. SOLUTION: The water purifying apparatus 10 is provided with a raw water tank 11 storing raw water supplied from a water supply source; a pump P1 feeding the raw water in the raw water tank 11 to a plurality of filters 12; a filtrate tank 15 storing filtrate purified by passing through the filters 12; a backwashing water tank 16 storing backwashing water; and a pump P2 feeding backwashing liquid in the backwashing water tank 16 to the filters 12. A three-way valve 22 serving as a flow path selector valve for switching flow-out direction of backwashing water based on the lapse of time after starting backwashing, and a control means 26 of the three-way valve 22, are provided as a mechanism for recovering backwashing water with a turbidity less than a given value from backwashing water flowing out of the filters 12 during backwashing. COPYRIGHT: (C)2009,JPO&INPIT
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