Natural and waste water treatment using an electrostatic field

21 Apr 2021, 15:20
oral Clean water Clean water


Oksana Medvedeva (SSTU)Mrs Tatyana Sautkina (Yuri Gagarin State Technical University of Saratov)


The efficiency of purification of low-turbid waters directly depends on the intensification of the process of sedimentation of particles in the liquid. At present, in order to accelerate the precipitation process during settling, various weighting additives are used, for example, quartz sand with a particle size of 0,05 - 0,14 mm, iron powder, magnetite with a particle size of no more than 0,05 mm, etc. the process of formation of flakes and contributing to the speedy settling. It is also possible to intensify the flocculation process without the use of chemical reagents, which can represent another type of pollution or an environmental threat, by using environmentally friendly technology for electrophysical water purification, which minimizes the need for any additional production of materials intended for use in the treatment process.
The problem of disinfecting liquids and gases by physical methods is currently still very important. The authors plan to use the electrostatic field created by devices such as capacitors to purify liquids and gases from pathogens.
The proposed technical result consists in increasing the cleaning efficiency by accelerating the deposition of impurities in the liquid by introducing additional treatment of the liquid with an electrostatic field before it passes through a tube twisted into a spiral coil. The application of the electrostatic field provides orientation polarization of atoms and molecules, as a result of which there is an intensification of the process of deposition of impurities (deposition rate), a reduction in the time of separation of flakes together with impurities of treated water, which ultimately increases the efficiency of water clarification.
This method is applicable for disinfecting both natural water and waste liquid.
Advantages of the method include:
insignificant dependence of its results on turbidity, pH enviroment, water stiffness;
it can be carried out relatively easily;
does not degrade the ecological condition of the environment;
does not require permanent replenishment of chemicals;
can be used in combination with other methods of purification of natural and waste waters that do not have a negative impact on the environment to achieve high purification results.
It is assumed that the electrostatic field, constant or modulated in frequency or amplitude, affects microorganisms not only mechanically as charged particles, but also destroys them, making them not viable and biologically inactive. As a result of tests on experimental installations developed by the authors, with the help of biological analysis of samples, it is necessary to find out the fields of what intensity affect microorganisms.
The authors aim to obtain an integral result without delving into the mechanism of interaction between the electrostatic field and microorganisms, since in this case it is practically necessary (important). This method can be applied, in our opinion, to the water and air environment, contaminated with pathogens; it can also be tested on air and water-air filters.
As a result of previous studies of natural water purification, a device for intensifying the sedimentation of suspended particles in a liquid has been developed (patent for utility model №170333). Currently, the device has been improved in order to intensify the process of liquid purification and sedimentation of impurities, to provide a more effective way to improve water quality without the use of chemicals (utility model patent №200770).

Publication IOP Conference Series: Earth and Environmental Science
Affiliation of speaker Yuri Gagarin State Technical University of Saratov

Primary author


Mrs Tatyana Sautkina (Yuri Gagarin State Technical University of Saratov)

Presentation Materials