Bactericidal Experiments Study Of Magnetoelectric Collaborative Processing Of Heterotrophic Bacteria In Industrial Cooling Water Treatment

For a heterotrophic bacteria bactericidal of circulating cooling water in thermalpower plants problems. Using high voltage electrostatic field and frequency pulsedmagnetic field on thermal power plant circulating cooling water sterilization. Usehomemade "magnetic collaborative industrial cooling water bactericidal processor" tostudy dynamic simulation bactericidal in circulating cooling water collected from apower plant in Inner Mongolia.Detection of circulating cooling water collected indicate that in the summerheterotrophic bacteria in the water higher than the national industrial cooling waterpermissible range. It is necessary to deal with heterotrophic bacteria bactericidal.Culturing the collected water and draw the heterotrophic bacteria growth rate curve tofind in a stable period of heterotrophic bacteria for bactericidal experiments.According to electromagnetic theory, Designed a "magnetic collaborativeindustrial cooling water bactericidal processor" and set up "circulating cooling waterdynamic simulation laboratory bench" ensure that the experimental continuous, stableoperation.By orthogonal experiment found factors affecting the results of the experimentare: waveform> Frequency> Flow> Water> duty cycle> Input Voltage. Bactericidalrate was stable under parameter as frequency of1000Hz, square wave,50%dutycycle, input voltage4000V, temperature33℃, flow250L/h, bactericidal effect best of47.93%.In the waveform of the three selected, when duty cycle of the square wave pulsein50%has the highest bactericidal rate.Mainly due to duty cycle of the square wavepulse in50%, the fundamental wave has maximum amplitude. fundamental wavebelongs to AC(alternating current)component, No matter how much the duty cycle is,Valid values of square wave is constant. At valid values unchanged the larger theamplitude of the fundamental the more AC component. The impact of heterotrophicbacteria is more intense. Additionally, square wave with a steep rising and falling andhas relatively stable flat, a sudden waveform changes. Therefore exhibit goodbactericidal effect. However positive pulse waveforms such as sine waves has poor sharpness, The actual bactericidal effect is not obvious.Heterotrophic bacteria Gram stain show that heterotrophic bacteria in circulatingcooling water is most flora of Gram-negative bacteria (G-).that is identified directionof bactericidal.By scanning electron microscopy, bactericidal of the water before the experimentand after to conducted a morphological analysis. Treated water through theelectromagnetic field part of the cell membrane of water heterotrophic bacteriaappeared perforation and rupture. The longer sterilization treatment the perforatedeffect is more obvious. Thus, high frequency electrostatic and electromagnetic pulsecan heterotrophic bacteria cell membrane perforated, leading to the death ofheterotrophic bacteria.