In the agricultural production and processing industry, technological processes in which electroactivated water and solutions based on it are effectively used are very widespread. The development of installations for the electroactivation of water and the optimization of operating modes are undoubtedly topical issues, the solution of which will make it possible to use them more effectively in agricultural practice. The results have been presented of studying the operational characteristics of a nonflowing device for the electroactivation of tap water both with an unchanged area of the separation membrane between the anode and cathode compartments and when this area changes its dimensions. Studies have made it possible to establish that, at a constant value of the working area of the separation membrane, the minimum consumption of electricity corresponds to the smallest interelectrode distance. Approaches for implementing effective operation of the electrotechnological installation are proposed.

Improvement of the agricultural crops seeds quality with their pre-sowing treatment in the electromagnetic field and the subsequent increase in grain yield and studying the mechanisms of stimulating effects -all those are the important problems of science and practice of the crop-growing sector. The purpose of the presented research was to study the mechanism for increasing the germinating ability of spring barley seeds as a result of pre-sowing treatment with an alternating electromagnetic field of an industrial frequency (50 Hz) for one second. After four days of storing, treated seeds were germinated under optimal conditions for this process and the number of germinated seeds of two spring barley varieties was counted each day during seven days period. Also we studied the onset, duration and passage of Microphenological Phases of Seeds Germination (MPPSG), based on the observation and the time registration of each seed morphological changes during germination with two-hour periodicity for seven twenty-four hours. It was established that seeds treatment in an electromagnetic field leads to an acceleration of their germination for one day due to the appearance of rapidly germinating seeds fraction and disappearing of the slowest germinating seeds fraction. This is due to the acceleration of the onset of all MPPSGs and reducing of their duration. Despite the reduction in the absolute values of the duration (in hours) of all MPPSGs, two phases ("Swelling" and "Short roots") began to occupy a greater time percentage in the structure of the germination period after seeds pre-sowing treatment. It is interesting, that treated seeds also absorb more water during the swelling period than untreated seeds, although the duration of that period has shortened. Therefore, the conclusion was made about stimulation of accelerated water absorption by seeds during the swelling period, the duration of which is shortened, by the electromagnetic field. It was established that there are fractions in the seed lots of different spring barley varieties that respond differently to treatment. Consequently, when studying the mechanism of the electromagnetic field influence on seeds germination, it is necessary to study not only the total effect, but also take into account the reaction of individual fractions. The proposed experimental approach can be used as an informative tool for obtaining new knowledge in the field of the stimulating effect of seed treatment in an alternating electromagnetic Aliya S. Kasakova et al.

The monograph examines the scientific foundations, methodological approaches and applied aspects of the electroactivation of air and water solutions for their direct use in various technological processes of agricultural production. The results of numerous experimental studies of the authors and other researchers conducted over several years to substantiate the parameters and operating modes of electrotechnological installations for the electrical activation of various media are presented. It is intended for undergraduates, postgraduates, engineers and researchers who study and deal with issues of electrical technology, in particular, the development of electroactivators and the use of electroactivation processes in various areas of agricultural production and processing of agricultural products.

One of the most important factors for increasing productivity in animal husbandry, poultry farming, and in greenhouse complexes, including for growing mushrooms, is the microclimate. To ensure normal air exchange in agricultural premises, roof fans with horizontal discharge of the VKR-4 type are recommended and used. When using ventilation equipment, it is necessary to take into account the technological requirements for creating a microclimate and the capabilities of the equipment. (Research purpose) The research purpose is in justifying the rational parameters of the system for creating a microclimate in agricultural premises when using a fan of the VKR-4 type, and to give recommendations to the agricultural producer. (Materials and methods) Authors investigated the efficiency of regulating the performance of the ventilation system by means of a valve in the exhaust shaft of the ventilator and by changing the supply voltage of the electric motor. (Results and discussion) The article presents experimental studies of the operation of the ventilation system when using a roof fan of the VKR-4 type to determine its effectiveness in order to maintain the required zootechnical parameters in rooms for keeping animals at the lowest energy costs. (Conclusions) Regulating the performance of the ventilation unit by means of a mechanical flap in the exhaust shaft of the fan by changing the angle of its opening is uneconomical. The regulation by reversing the electric motor provides a 1:2 ratio of the air supply, but the power consumption of the electric motor increases almost twice during the reverse. When the fan performance is controlled by changing the motor voltage from 70 to 173 volts of line voltage, the performance increases, but with a further increase in voltage, it does not change, and the power consumption continues to increase.