Water treatment process of nanofiltration device with positive/negative charges and index obtaining method

The invention provides a water treatment process of a nanofiltration device charged with positive/negative electricity, and the process adopts a water treatment system of the nanofiltration device charged with positive/negative electricity to treat raw water so as to prepare mixed produced water. The invention also provides a method for obtaining the index of the mixed produced water. The mixed produced water is prepared by a water treatment process of the nanofiltration device with positive/negative electricity. According to the method, after the water quality data of the raw water is calculated, the water quality data of the mixed produced water, the sensory index and health index of the raw water and the sensory index and health index of the mixed produced water are obtained. According to the water treatment process of the nanofiltration device with positive/negative charges, ions in raw water can be controllably removed, and the ion concentration in mixed produced water is controlled within a proper range