title: Inactivation of Heterosigma akashiwo in ballast water by circular orifice plate-generated hydrodynamic cavitation.
abstract: The discharge of alien ballast water is a well-known, major reason for marine species invasion. Here, circular orifice plate-generated hydrodynamic cavitation was used to inactivate Heterosigma akashiwo in ballast water. In comparison with single- and multihole orifice plates, the conical-hole orifice plate yielded the highest inactivation percentage, 51.12%, and consumed only 6.84% energy (based on a 50% inactivation percentage). Repeating treatment, either using double series-connection or circling inactivation, elevated the inactivation percentage, yet consumed much more energy. The results indicate that conical-hole-generated hydrodynamic cavitation shows great potential as a pre-inactivation method for ballast water treatment.
authors.affiliation: a College of Marine Science and Engineering , Shanghai Maritime University , Shanghai 200135 , People's Republic of China.
authors.forename: Daolun
authors.initials: D
authors.lastname: Feng
authors.affiliation: a College of Marine Science and Engineering , Shanghai Maritime University , Shanghai 200135 , People's Republic of China.
authors.forename: Jie
authors.initials: J
authors.lastname: Zhao
authors.affiliation: a College of Marine Science and Engineering , Shanghai Maritime University , Shanghai 200135 , People's Republic of China.
authors.forename: Tian
authors.initials: T
authors.lastname: Liu
mesh_terms: D004867:Equipment Design; D057446:Hydrodynamics; D006874:Hydrostatic Pressure; D058865:Introduced Species; D012767:Ships; D058009:Stramenopiles / Q000502:physiology*; D018508:Water Purification / Q000295:instrumentation* / Q000379:methods*
keywords: Ballast water; Heterosigma akashiwo; conical-hole orifice plate; hydrodynamic cavitation