INFLUENCE OF SLUDGE SUSPENSIONS CONCENTATION ON ULTRASOUND TREATMENT RESULTS
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Abstract
The influence of the concentration of silt suspensions on the results of ultrasonic treatment is considered. It was found that the nature of changes in the composition of the liquid phase of activated sludge is determined by the specific energy consumption for ultrasonic treatment, the density of ultrasound and the type of source. Ultrasonic treatment is accompanied by an increase in the temperature of the silt suspension, which is greater the higher the concentration of the solid phase. It is shown that the ratio of the increase in the COD of the liquid phase to the specific energy consumption depends on the concentration of active silt. The main contribution to the increase in the COD of the liquid phase is made by particles with a size of 0.2...20 microns. The content of dissolved substances in the liquid phase of activated sludge depends linearly on the specific energy consumption for ultrasonic treatment n the entire studied range of active sludge concentrations. The ratio of BOD to increase the growth of COD for liquid phase practically does not depend on the density of the ultrasound.
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