摘要：

从变频脉冲磁场方向的变化以及固定频率与扫频范围两个方向进行了低频脉冲磁场的杀菌实验。实验表明微生物生理功能在磁场作用下发生改变,变频脉冲电磁场既能抑制循环水中异养菌的生长,也能刺激异养菌的繁衍;当磁场方向与水流方向平行和垂直时能达到70%以上的杀菌率,其中磁场方向与水流方向平行时在11～17 kHz频率范围内的杀菌率达到82.64%。因此利用低频脉冲磁场进行杀菌时应确定有效的扫频范围,才能达到较好的杀菌效果。

关键词: 电磁脉冲, 冷却水, 电磁生物效应, 杀菌率

Abstract:

The bactericidal experiments of low-frequency pulsed magnetic field have been carried out,aiming at two aspects:the change of variable frequency pulse magnetic field direction,and the two directions of fixed frequency and sweep frequency range.The experimental results show that the change of microbiological physiological function took place under the magnetic field effect.The variable-frequency pulsed magnetic field not only can inhibit the growth of heterotrophic bacteria in circulating cooling water,but also can stimulate the reproduction of heterotrophic bacteria.When the direction of magnetic field is parallel and perpendicular with the water flow direction,the bactericidal rate reaches more than 70%.When the direction of magnetic field is parallel with the water flow direction in the range of 11-17 kHz sweep frequency,the bactericidal rate can reach 82.64%.Therefore,the effective sweep frequency range should be determined,when low frequency pulsed magnetic field is made use of.Thus,better bactericidal effect can be obtained.

Key words: electromagnetic pulse, cooling water, electromagnetic bio-effect, bactericidal rate

中图分类号: 

• TM621.8