The Research on Pulsed Arc Electrohydraulic Discharge With Discharge Electrode and Its Application to Removal of Bacteria

With the rapid expansion of urbanization, the technology of wastewater treatment has an increasingly crucial role in the field of environmental protection science and technology. The technology of pulsed arc electrohydraulic discharge (PAED) has been studied in depth by virtue of its signally treatment effect, low power consumption, and so on. The experiments were carried out with the wastewater from cyclic activated sludge system tank. The 10-L PAED reactor with eccentric electrodes is designed as industrialization mode. The PAED power supply is 3 kJ/pulse and the discharge rate is 2 Hz. The experiments on different distances, radii, and types of water gap electrodes were carried out. Three different electrode materials (titanium, tungsten, and titanium alloy) were used in the PAED system in the experiments. The results show that the sterilization effect on Escherichia coli is the highest when the material of the water gap electrodes is tungsten and the cumulative input electrical power is 1000 Wh/m³. Fundamental discharge characteristics linked with disinfection performance will be discussed in detail in this paper.