脉冲磁场处理含菌废水的实验研究

Experimental research on the disposal of sewage containing bacterium by pulsed magnetic field

利用脉冲磁场杀菌设备对含菌废水进行处理,以生活污水脉冲磁场杀菌为例,研究磁场强度、脉冲数、pH值和污水温度对杀菌效果的影响。结果表明:①随着磁场强度,脉冲数或pH值的增加,细菌去除率会出现一峰值,杀菌效果最好;之后随着磁场强度、脉冲数或pH值的进一步增加,杀菌效果反而变差。在磁场强度分别为7.6T和6.6T左右时,细菌总数杀菌率和大肠菌群杀菌率分别出现了峰值;在脉冲数分别为10和12时细菌总数和大肠菌群杀菌率出现峰值。②细菌总数去除率和大肠菌群去除率都随污水温度的上升而升高,污水温度越高,微生物对磁场的敏感性越强,杀菌效果越好。③脉冲磁场对生活污水杀菌的主次因素为:磁场强度>脉冲数>污水温度>pH值。

Wastewater containing bacterium was treated by pulsed magnetic field sterilization equipment. Taking domestic sewage for example, the influence of intensity, pulse number of magnetic field, pH and the temperature of the sewage on sterilization effect was studied. The results indicate that： （1） with the increasing of magnetic field intensity, pulse number and pH, the removal efficiency of bacterium reached a maximum value, indicating optimal sterilization effect, but further increase would bring bad result. When the magnetic intensity is 7.6T or 6.6T, and the pulse number was 10 or 12, the removal efficiency of total bacterium and coliform shows maximum values respectively. （2） the removal efficiency of total bacterium and coliform both increased with the rising of the sewage temperature, the higher the temperature of the sewage and the more sensitive the microorganisms to the magnetic field would be, the better the sterilization effect would be; （3） the order of the primary and secondary factors of the pulsed magnetie field sterilization is the intensity of magnetic field 〉 the pulse number 〉 the temperature of the sewage 〉 pH.