The values of еffective rate constants of microorganisms destruction (kd) were compared, depending on the diameter of cells and gas nature bubbling under cavitation conditions. The efficiency of cell destruction under Ar/US is larger by 2–2.5 times compared to He/US, O2/US and CO2/US. Yeast cells were destroyed faster than bacteria (kd (yeast cells) >> kd (bacteria cells)) that is explained by the cells size. The cell stability under cavitational conditions is reversely proportional to the cell diameter.
The disinfection of water from Diplococcus, S.lutea, B.cereus, and Ps.fluorescens bacteria types and the yeast Sacch.cerevisiae via the joint action of gas/US has been investigated. The investigated microorganisms were identified in natural water and wastewater in dominant amounts. The relative ranges of effective cell destruction by combined gas/US action have been established. The most efficient microorganism destruction has been obtained using Ar/US compared to Не/US, СО2/US and О2/US and is accounted for by those gas properties able to affect sonochemical activity.
The research represented in the given work concerns studying the organoleptic, chemical and microbiological indicators in the drinking water on the territory of the Ajara Autonomous Republic. Particularly, among the organoleptic indicators the scent, taste and color of the drinking water have been
determined; as for the chemical indicators – pH, ammonia and nitrite- and out of the heavy metals – lead, arsenic, cadmium and zinc have been determined.
The aim of the work is to improve the method and means of multi-spectral ecological control of phytoplankton biomass in water environments in situ using a quadrocopter with a multi-spectral camera. The instrumental and methodological errors of indirect measurements of phytoplankton biomass in the near-surface layer of the aquatic environment using the developed means of environmental control have been analyzed.
The aim of the work is to improve the method and means of multispectral measurement of the content of unsuitable chemical plant protection products in aqueous media using bioindication on phytoplankton. The article analyzes the errors of indirect measurements and the reliability of the control of the concentration of pesticides using the developed means of environmental monitoring of integral parameters of pollution of water bodies
The aim of the work is to improve the methods and tools of multi-spectral measurement control to improve the accuracy of monitoring the integral parameters of wastewater pollution, which is necessary to ensure their effective purification using higher aquatic plants. The complex for wastewater treatment is improved, which is supplemented with the multi-spectral monitoring system of integrated pollution parameters.
The article is devoted to development of theoretical foundations of improving corrosion resistance of concrete protective coatings based on filled with aluminum and zinc oxides polimetylfenilseloksanu. Methods of mathematical experiment planning with regard to water absorption depending on the concrete and coating adhesion strength optimum component of the original compositions for protective coatings, determined their technological and physical and mechanical properties, the thickness of the coating, application methods and the surface of the concrete conditions of the studied.
This review covers the main agents used for in situ and ex situ chemical oxidation of organic contaminants particularly oil products, in soil and water environments. Among them there are hydrogen peroxide, permanganate salts, ozone and sodium persulfate. The fields of application, as well as benefits and disadvantages of the mentioned agents use were described.
The powerful oxidative action of ozone provides basis for development of novel or improved technologies which are widely used in ecology and industry. Special attention is paid to purification of waste gases, water, and soils. The disinfection and cleaning of drinking and process water are considered in detail. Applications of ozone in chemical, pharmaceutical and perfume industries, cosmetics, cellulose, paper and sugar industries, flotation, microelectronics, and many others are also examined in the review.
Push-pull vibratory electromagnetic cavitator of resonance action consists of two electromagnets, an elastic system connecting their stators and anchors, and two cavitation breakers located in the flowing liquid in the form of soundboards with holes which fluctuate in antiphase. High degree of biological disinfection of water with the productivity of approximately 3.5 m3/h at its continuous supply is provided due to the combination of magnetic and cavitation effects.