| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide water treatment equipment with which, when supply of treated water to a demand part is restarted after stopped, the supply of the treated water of demand purity is restarted in a short period of time while suppressing energy consumption, in water treatment using an electric deionizer. <P>SOLUTION: Permeated water obtained by treating raw water by reverse osmosis membrane apparatus 20 is supplied from a water storage tank 30 to the electric deionizer 40 to be deionized, and obtained treated water is supplied from a water supply route 430 to the demand part. When supply of the treated water to the demand part is stopped, a switching valve 450 is used to switch a flow passage of the treated water from the electric deionizer 40 to a first circulation route 440, and the electric deionizer 40 and a water pump 32 are intermittently stopped. Thereby treated water staying in the electric deionizer 40 is intermittently deionized and further is circulated through the first circulation route 440. <P>COPYRIGHT: (C)2013,JPO&INPIT |
