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A critical review of the current technologies in wastewater treatment plants by using hydrodynamic cavitation process: principles and applications

TitoloA critical review of the current technologies in wastewater treatment plants by using hydrodynamic cavitation process: principles and applications
Tipo di pubblicazioneArticolo su Rivista peer-reviewed
Anno di Pubblicazione2020
AutoriMancuso, G., Langone Michela, and Andreottola G.
RivistaJournal of Environmental Health Science and Engineering
Volume18
Paginazione311-333
ISSN2052336X
Parole chiaveCavitation, critical analysis, flow velocity, Fluid flow, geometry, hydrodynamics, microorganism, Optimization, wastewater treatment plant
Abstract

In the last decade, hydrodynamic cavitation (HC) was increasingly used in the field of wastewater treatment. Due to its oxidative capability, HC was applied to treat aqueous effluents polluted by organic, toxic and bio-refractory contaminants, whereas its mechanical and chemical effects have allowed to disintegrate cells of microorganisms in biological applications. Due to their geometries, HC can be detected in some reactors, in which a variation of hydraulic parameters in the fluid such as flow pressure and flow velocity is induced. HC process involves the formation, growth, implosion and subsequent collapse of cavities, occurring in a very short period of time and releasing large magnitudes of power. In this paper, the vast literature on HC is critically reviewed, focusing on the basic principles behind it, in terms of process definition and analysis of governing mechanisms of both HC generation and pollutants degradation. The influence of various parameters on HC effectiveness was assessed, considering fluid properties, construction features of HC devices and technological aspects of processes. The synergetic effect of HC combined with chemicals or other techniques was discussed. An overview of the main devices used for HC generation and different existing methods to evaluate the cavitation effectiveness was provided. Knowledge buildup and optimization for such complex systems from mathematical modeling was highlighted. © 2020 Springer Nature Switzerland AG.

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85085334540&doi=10.1007%2fs40201-020-00444-5&partnerID=40&md5=0a5276ace0d00597eca4da6c2d78b81b
DOI10.1007/s40201-020-00444-5
Citation KeyMancuso2020311