| 摘要 |
PROBLEM TO BE SOLVED: To improve an effective utilization efficiency of water and to reduce a load and cost required for wastewater treatment by using RO concentrate water in a plant carrying out desalting treatment using an RO membrane device without special treatment to reduce the amount of RO concentrate water discharged to the outside of the plant or to eliminate the discharge of the RO concentrate. SOLUTION: In a plant having high-grade water production equipment for treating raw water with an RO membrane device to produce high-grade water (permeate), a high-grade water lines using the high-grade water, and a low-grade water lines using low-grade water whose quality is inferior to that of the high-grade water, a water treatment system uses at least a part of the RO concentrate water in a low-grade water lines together with low-grade water. COPYRIGHT: (C)2009,JPO&INPIT
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