01797nas a2200157   4500008004100000245005900041210005900100260000800159300001200167490000700179520128400186100001601470700001601486700001501502856012201517       2016                        eng d00aEffect of orifice shape on water disinfection efficacy0 aEffect of orifice shape on water disinfection efficacy  cSEP  a765-7710 v353 aHydrodynamic cavitation offers distinct advantages for water disinfection and waste watei treatment particularly at large scales of operations. For applying hydrodynamic cavitation foi water disinfection/treatment, water stream to be treated is passed through a fluidic device ir which there exists a low pressure region. Cavities are generated in this region when the pressurt falls below vapour pressure (in absence of any dissolved gases). These cavities are then collapsec when they travel to regions of higher pressure and lead to very high shear, temperatures anc pressures in localized regions. These high pressure/temperature as well as high shear facilitati disinfection as well as reduction in chemical oxygen demand, colour and amonical nitrogen in the water. In this work, we have investigated hydrodynamic cavitation generated by five difieren orifices have been studied which have different shapes with same fractional open area and have tested their effectiveness for water disinfection. The efficacy of generated cavitation on wate disinfection was quantified based on measurements of non-pathogenic E. coli colony forminj units (CFU/mL). The presented results and analysis will be useful for designing hydrodynamii cavitation based systems for water disinfection1 aGaikwad, V.1 aGaikwad, S.1 aRanade, V.  uhttps://www.scopus.com/record/display.uri?eid=2-s2.0-85019205889&origin=inward&txGid=ce34b9a17392bdd05364dde2f57a1e52