The paper is devoted to the oil-containing water treatment by dissolved air flotation. Patents search revealed trends in the dissolved air flotation devices development. A method for increasing the treated fluid aeration by its dispersion at excess pressure is offered.The electrolyte influence on the flotation extraction efficiency is researched. The change in electrolyte concentration influences the bubble coalescence degree, as well as the charge on the particle and the bubble. It is shown that an increase in electrolyte concentration can increase the flotation treatment efficiency. At that, a cheap source of electrolytes is by-products of different processes.In addition, the paper presents data from the regulations in force in the territory of the Russian Federation, on the maximum permitted concentrations of oil products in wastewater. The advantages of dissolved air flotation in comparison with other types of flotation extraction are shown. This paper may be useful to engineers and scientists, whose work involves oil-containing water treatment.

Abstract. In this research, a possibility of using liquid atomization for improving the efficiency of purification of wastewater by different methods has been studied. By the introduced method and an experimental setup for wastewater purification, saturation rate increases with its purification by means of dissolved air flotation. Liquid atomization under excess pressure allows to gain a large interfacial area between the saturated liquid and air, which may increase the rate of purified liquid saturation almost twice, compared to the existing methods of saturation. Current disadvantages of liquid atomization used for intensification of wastewater purification include high energy cost and secondary emulsion of polluting agents. It is also known that by means of liquid atomization a process of ozonizing can be intensified. Large contact surface between the purified liquid and ozone-air mixture increases the oxidizing efficiency, which allows to diminish ozone discharge. Liquid atomization may be used for purification of wastewaters by ultraviolet radiation. Small drops of liquid will be proportionally treated by ultraviolet, which makes it possible to do purification even of turbid wastewaters. High-speed liquid motion will prevent the pollution of quartz tubes of ultraviolet lamps.

Íàó÷íî-òåîðåòè÷åñêèé aeóðíàë Èçäàåòñÿ ñ ìàðòà 1958 ã. Âûõîäèò îäèí ðàç â ìåñÿö ¹ 1 (709) ßíâàðü 2018 ã. Ñ Î Ä Å Ð AE À Í È Å ÒÅÎÐÈß ÑÎÎÐÓAEÅÍÈÉ Ìèùåíêî À.Â. Ìîäåëèðîâàíèå äâóìåðíûõ òåìïåðàòóðíûõ ïîëåé â ñòðóêòóðíî-íåîäíîðîäíûõ ñòåðaeíÿõ ñ ðàçðûâíûìè ãåîìåòðè÷åñêèìè ïàðàìåòðàìè ....

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