Abstract: 【Abstract】Objective To prepare sustainable ultra-pure dialysis water from existing water treatment systems. Methods Through the investigation on the relationship between number of bacterial colonies and endotoxin content in dialysis water and disinfection time of the water treatment systems in the Center for Hemodialysis of Shaanxi Traditional Chinese Medicine Hospital, we tried to find out the best disinfection cycle at which bacterial number and endotoxin content in dialysis water satisfy the standards, and then set up this disinfection cycle for water treatment systems. Results The disinfection cycle of water treatment systems can be
adjusted to one month to maintain the bacterial number and endotoxin content in dialysis water compliant with the ultra-pure water standards. Conclusions The disinfection cycle of the existing water treatment systems can be adjusted to obtain sustainable supply of ultra-pure dialysis water.

Key words: Water treatment system, Disinfect, Bacterial, Endotoxin, Ultra-pure dialysis water