Removal of blue-green algae using the hybrid method of hydrodynamic cavitation and ozonation

Effect of process intensifying parameters on the hydrodynamic cavitation based degradation of commercial pesticide (methomyl) in the aqueous solution

“…Combining cavitation and ozonation process can overcome this limitation since high fluid turbulence created by cavitation phenomena can enhance the rate of mass transfer of ozone in aqueous solutions [29]. Beneficial effects of combined process are also due to the decomposition of ozone in the presence of cavitation to produce atomic oxygen (O), which after reacting with water generates highly reactive hydroxyl radicals [30][31][32][33][34][35][36]. In addition to this hydroxyl radicals are also generated by the dissociation of water due to cavitational effects.…”

“…Mass transfer resistances offered for the dissolution of ozone in aqueous solution are also reduced by virtue of cavitation [29][30][31][32][33][34][35][36].…”

“…The sample calculation for determination of cavitational yield in case of HC + Ozone process has been given in Appendix A. The established results are due to higher oxidation potential of ozone as compared to H 2 O 2 and easy dissociation of ozone into highly reactive hydroxyl radicals in the presence of cavitation [29][30][31][32][33][34][35][36].…”

The effect of hydrodynamic cavitation on Microcystis aeruginosa: Physical and chemical factors

“…However, the discharge of excessive nitrogen-containing and phosphatecontaining nutrients into the natural environment has led to increased blue-green algal (i.e. cyanobacterial) blooms in water bodies since the 1950s (Wu et al, 2012). Surface cyanobacterial blooms in eutrophic lakes and rivers have been recognized as a serious environmental problem (Smith et al, 1999).…”

“…Compared to acoustic cavitation, HC is more energy efficient and better suited to large scale applications (Gogate, 2007;Sivakumar and Pandit, 2002;Wu et al, 2012). However, until now studies were limited to analyses on water disinfection by disruption of Escherichia coli (Chand et al, 2007;Mezule et al, 2009) and zooplankton (Sawant et al, 2008), and little information is available in the literature on the removal of algae by HC (Gogate, 2011;Gogate and Kabadi, 2009;Nakano et al, 2001).…”