| 摘要 |
PROBLEM TO BE SOLVED: To develop a method for controlling a content of electrolytic ions contained in a drainage generated by washing, and the like, and improving the water quality of the drainage to use washing water regenerated. SOLUTION: The method comprises subjecting the cleaned drainage obtained by cleaning treatment of the washing drainage to an ion exchange to generate soft water when the electric conductivity of the cleaned drainage is≤6,000 (μS/cm) and using the soft water as the regenerated washing water which can be reused as the washing water. The cleaned drainage made into the soft water can increase the surface active effect of a detergent and therefore has high detergency. A high degree of the detergency can thus be imparted thereto. The washing drainage discharged from a factory, and the like, can be improved in the water quality and can be recycled as the washing water and therefore a water rate can be reduced and the amount of the detergent can be saved by about 45% than usual. This method is effective for environmental conservation due to the reuse. COPYRIGHT: (C)2005,JPO&NCIPI
|
