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Development of a theoretical model of wastewater treatment in an ultrasonic field under gravity

P.D. Vikulin, associate professor of Water supply
and sanitation Department;
V.B. Vikulina, associate professor of Water supply
and sanitation Department;
M.A. Pervushina, student
Moscow State University of Civil Engineering (National Research University)

Abstract. The use of ultrasonic vibrations in the technology of wastewater treatment from lipid substances is part of the scientific problem of using in this field of knowledge of physical methods, which include: ultrasonic, magnetic, high­frequency, x­ray, ultraviolet and others.
Currently, ultrasonic vibrations are widely used in various industries: metallurgy; chemical; mechanical engineering; medicine, etc.
The wide application of ultrasound is explained by the variety of phenomena occurring in the ultrasonic field. Ultrasonic vibrations initiate dispersion and emulsification of substances, promote coagulation and degassing, affect the processes of crystallization and dissolution; it is known that ultrasound causes a variety of chemical transformations of substances, including oxidation, reduction, polymerization, and so on.
The explanation of these phenomena is found in a variety of ultrasonic effects: cavitation, shock waves, microflows, acoustic wind, and so on.
The schemes of ultrasonic generators are continuously improved, work on the development of methods for the use of ultrasound and the search for new areas of its application is progressing.
Under these conditions, the question of the possibility of using ultrasound for wastewater treatment from fatty substances is relevant. However, the theoretical side of this issue is a little­studied object.
Key words: ultrasound, cavitation, separation, sedimentation, flotation.

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