Application of Hydrodynamic Cavitation to Improve the Biodegradability of Municipal Wastewater
 
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Lublin University of Technology, Faculty of Environmental Engineering, 20-618 Lublin, ul. Nadbystrzycka 40B, Poland
CORRESPONDING AUTHOR
Magdalena Lebiocka   

Lublin University of Technology, Faculty of Environmental Engineering, 20-618 Lublin, ul. Nadbystrzycka 40B, Poland
Publication date: 2020-08-01
 
J. Ecol. Eng. 2020; 21(6):155–160
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ABSTRACT
In the present study, the application of hydrodynamic cavitation to improve the biodegradability index of mechanically pre-treated municipal wastewater was examined. The experiments were carried out at the pressure of 3.5, 5, and 7 bar, which was sustained every time in the inlet zone of the cavitation device. As a result, the concentration of soluble chemical and biochemical oxygen demand increased, indicating an effective decomposition and solubilization of complex organic matter. These were accompanied by a visible drop in COD value; in turn, increases in the BOD5/COD ratio known as biodegradability index were observed.