循环冷却水中杀生剂适宜使用条件的研究

Research on the optimum conditions of germicide applied in cycled cooling water

选用氧化型杀生剂二氯异氰尿酸钠来抑制循环冷却水中微生物的生长,分别将药剂的投加质量分数、温度、接触时间、pH值等4个因素作为变量对杀生效果进行评价。研究表明,杀生剂的质量分数对杀生率的影响最大,其次是时间。再次是pH值,最后是温度；适宜条件为杀生剂的质量分数4μg/ g,时间6．8 h,温度36℃,pH值为6．8,此条件下杀生效果最佳。

Sodium dichloro-isocyanurate is used as oxidative ger- micide to restrain the microbe growth in the cycled cooling water. The evaluation of germicidal effect is made and 4 factors are dis- cussed:the mass fraction of germicide,temperature,contact time and pH value.The results show that the most important factor is mass fraction of germicide,the next one is time,the third one is pH value and the last one is temperature.The optimum conditions of germicide is also obtained as follows:the mass fraction of germicide is 4μg/g,the time is 6.8 h,the ternperature is 36℃,and the pH value is 6.8.