Electric discharge in water as a source of UV radiation, ozone and hydrogen peroxide

Abstract

Results are presented from investigations of multispark electric discharge in water excited along multielectrode metal-dielectric systems with gas supply into the interelectrode gaps. The intensity distribution of discharge radiation in the region covering the biologically active soft UV (190⩽λ⩽430 nm) has been determined and the absolute number of quanta in this wavelength interval has been measured. The potentiality of the slipping surface discharge in water for its disinfection is analysed. The energy expenditure for water cleansing is estimated to be as low as ~10-4 kWh l-1.

Multispark Discharge in Water as a Method of Environmental Sustainability Problems Solution

“…Measurements performed in our work (see [9]) showed that the radiation spectrum of the multispark discharge in water contains the biologically active component, and the intensity of this component increases substantially as the pulse energy increases.…”

“…The basic components were a chamber filled with water, a multielectrode system for exciting of slipping surface discharge, and high voltage power supply ( Figure 1). The multielectrode discharge system ( Figure 2) was similar in design to that previously described in [6,8,9]. The discharger consisted of a set of annular electrodes mounted on a dielectric tube surrounding a back-current conductor.…”

“…The used multispark discharger regimes are identical with the regimes previously investigated [9] where an examination was made of the generation of biologically active UV radiation, ozone, hydrogen peroxide, and other active species (see preceding section of this paper). Measurements carried out during the present study allowed calculation of energy costs of the disinfection action using multispark electric dischargers, and these were as low as 10 −4 kW h L −1 for bacteria.…”

“…Based on the results of absolute measurements of UV radiation by the actinometric method, we estimate the intensity of the flux of bactericidal rays per pulse discharge as UV( ) ≈ 3 ⋅ 10 6 W/cm 2 [9]. Given this intensity, in turn, the effectiveness of the action of radiation on E. coli bacteria can be estimated from the known relation [21] …”

The dynamics of the electric discharge in the water with microbubbles

“…Позднее явление электрического пробоя в воде было использовано в технологии электрогидродинамического измельчения [2] и электрогидравлической ударной технологии [3]. Исследования последних лет [4][5][6] по-казали перспективность использования различных конфигураций электрического раз-ряда в жидкости с целью её очистки. Применение плазменных технологий для получе-ния питьевой или даже технической воды связано с явлением электрического разряда в среде с относительно высокой проводимостью.…”