Effect of ultrasound on sedimentation of suspended solids in water

Abstract

Physico-chemical effects in the aqueous medium that arise in the ultrasonic field contribute to a change in the deposition rate of the coagulated slurry. An indispensable condition for the development of the process is the ultrasonic field in the cavitation regime. There is a change in the potentials of the medium. Experimental studies of the influence of ultrasonic vibrations on the processes of coagulation of suspended solids in the purification of water by physical methods expand their field of use, which is topical. The purpose of the work is conducting experiments on the effect of ultrasound on the deposition of suspended solids and determining the efficiency of the process assigned to the dose of the coagulant, with finding the numerical values of the constants of the theoretical equation. The condition of the experiment is the effect of ultrasound on the water with clay substances before the introduction of the coagulant. The magnetostriction method with the help of an ultrasonic generator of batch production was used to obtain ultrasonic oscillations. When sampling and performing analyzes, standard techniques were used. The concentration of clay particles in water was estimated using a photoelectrocolorimeter. As a result of the studies, data were obtained that allow to determine the increase in the sedimentation efficiency of suspended particles assigned to the coagulant dose, depending on the time of ultrasonic treatment. Experiments have confirmed the relationship between the effect of precipitation in the coagulation process, the dose of coagulant and the time of scoring. As studies have shown, an increase in the duration of ultrasound treatment causes a decrease in the administered doses of the coagulant.