Abstract

AGUDELO-VALENCIA, Rafael N. et al. Ultrasonic cavitation for wastewater treatment. A Review. Ing. compet. [online]. 2022, vol.24, n.2, e30411661.  Epub May 26, 2022. ISSN 0123-3033.  https://doi.org/10.25100/iyc.v24i2.11661.

This review focuses on the technique known by the name of cavitation for wastewater treatment. There are several ways to make a fluid cavitate; the focus of this document is hydrodynamic cavitation and acoustic cavitation. Cavitation occurs when a fluid abruptly changes phase due to a variation in its pressure: the cavities have a considerable amount of energy that favors reactions inside and at the interface of each bubble or cavity that forms within the liquid, as well as in the fluid. This treatment technique is favorable since does not imply the use or dosage of chemical inputs to reduce the concentration of contaminants in the water. The sources consulted indicate that to achieve greater effectiveness of the cavitation process, it is necessary to intensify the process by the simultaneous implementation of other treatment techniques, including advanced oxidation processes, electrochemical processes, and water clarification. The combinations of cavitation with other wastewater treatment techniques have been studied for different recalcitrant pollutants, achieving very favorable results. This work is mainly focused on wastewater from tanneries.

Keywords : Ultrasonic cavitation; Hydrodynamic cavitation; Wastewater; Tanneries.

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