The analysis of the known results of processing model aqueous solutions with different types of electric discharge using the AOT technology is carried out. Comparison of the processing efficiency for the decomposition of model pollutants for energy yield criterion (Y), as well as the prospects for further industrial implementation of the technology for the criterion of expected productivity, is carried out. The factors that influence the value of energy output and energy efficiency, in general, are determined. Ref. 17, fig. 2, tables 2.

It was shown the possibility of creating in atmospheric air in a plane-parallel gap in the presence of water with a drop-film state of a uniform pulsed barrier discharge, which was initiated by unipolar voltage pulses of amplitudes up to 28 kV and fronts ≈ 40 ns and duration about 100ns. Studies were carried out at thicknesses: the dielectric barrier is 2 mm and the gas gap 3 mm. The characteristic dimensions of tap water drops were 1 mm and its films on the walls of the gas gap ~ 0.1 mm. For these conditions, the following amplitude discharge parameters were achieved: the electric field strength in the gas gap was about 60 kV/ cm, the current density-2.6 A/cm 2 , the electron concentration-8.5•10 11 cm-3 with their average energy-3,7 eB. The discharge becomes non-uniform: zones with bright filamentary formations appear in the gas gap when increasing of the frequency of repetition of voltage pulses over ≈ 300 Hz,. The limiting frequency of the discharge transition into an inhomogeneous form becomes significantly higher (more than 500 Hz) with transverse purging of the gas gap with air, the speed of which at the entrance to the electrode system is ≈ 0.6 m/s. References 12, figures 7.

By simulation, it was stated the distribution of the electric field strength and potential in electrode sstem for creation a pulsed barrier discharge in atmospheric air in the presence of water in it in a droplet-film state. The calculations were performed under the conditions that the duration of the pulse front is ≈40 ns, the width of the gas gap is 3.2 mm, the thickness of the water films on its walls is 0.15 mm and the diameter of the droplets is 0.5 -1.5 mm. It is shown that the presence of water droplets dramatically changes the distribution of the field in the gap: from uniform it becomes sharply inhomogeneous. The maximum field strength is observed at points on the surface of the drop, which are located nearest to the walls of the gap. This field strength is ≈2.5 times higher than that characteristic of a uniform field in the absence of a drop. The effect of neighboring drops on the distribution of the electric field is also considered. It 1 / 3 2020 N2 s3 becomes significant (> 10%) when the distance between adjacent drops becomes less than ≈1.5 mm. References 8, figures 6.

A technique for calculating the parameters of a magnetic switch as an element of a generator of short high-voltage pulses of tension to coordinate its compatible work with a water treatment chamber by dint of pulse barrier discharge is shown. The expediency and efficiency of using such a switch as an element that, by shunting, the discharge chamber, discharges the barrier to the arrival of the next voltage pulse has been confirmed. It is proved that with the accepted geometrical dimensions of the discharge chamber and the amplitude of the pulse voltage, provided that the magnetic switch is present that it is possible to increase the practical use of electricity by ~ 40% due to that which was accumulated in the dielectric barrier in one discharge. Ref.10, fig. 5.

The influence of various factors that can affect the efficiency of pulsed barrier discharge treatment in the air of atmospheric pressure of a model sample of contaminated water in the droplet-film state was investigated. The impurity in the water was an organic dye (methylene blue) with an initial concentration of 50 mg / l. Water consumption was 2–4 l / min, the characteristic diameter of the droplets was 1.7 mm, and the film thickness at the electrodes was about 0.15 mm. The water was treated in a flat discharge chamber with gas gaps of 3.36 mm and glass dielectric barriers, and in addition in an ozonation chamber, which used ozone that had not previously been useful. The discharge was excited by short ~ 100 ns pulses from voltage up to 21 kV, which provided the current density amplitude up to 1.7 A / cm2 and their energy up to 140 mJ. The decomposition time of the impurity and the energy efficiency of the discharge depending on the pulse repetition frequency of 25–300 Hz were studied. The discharge had the highest energy efficiency at frequencies of 25-50 Hz, at which the energy yield, which corresponds to 50% decomposition of the impurity, reaches ≈270 g / kWh, and for 90% decomposition − 60 g / kWh. As the pulse energy increases, the transparency of the solution for ultraviolet light increases, which is associated with the splitting of stable benzene rings that is part of the impurity molecule. No noticeable effect of water and gas consumption (0.36-1.5 l / min) on the research results was found. References 16, figures 8.