title: Establishing and maintaining specific pathogen free (SPF) conditions in aqueous solutions using ozone.
abstract: The paper discusses the use of ozone in space applications for the elimination of pathogens, and the enhancement of the oxidation potential of ozone using hydrogen peroxide and ultraviolet radiation. These combinations will be possible to set up in space conditions. The sterilizing effect versus free radical generation is an important equilibrium to establish when specific pathogen free conditions are wanted in aqueous solutions containing organic matter. In situ sterilization of plant roots in hydroponic systems, as well as the oxidation of root exudates, will be discussed. The paper will contain examples of the chemical interaction of ozone with some of the other compounds found in hydroponic systems.
authors.affiliation: BV Hydro Systems, Taastrup, Denmark.
authors.forename: B
authors.initials: B
authors.lastname: Vestergard
mesh_terms: D000818:Animals; D017756:Aquaculture; D003470:Culture Media; D005399:Fishes / Q000382:microbiology*; D005609:Free Radicals; D006861:Hydrogen Peroxide / Q000737:chemistry; D018527:Hydroponics / Q000379:methods*; D010126:Ozone / Q000138:chemical synthesis / Q000737:chemistry*; D018517:Plant Roots / Q000382:microbiology; D010944:Plants / Q000382:microbiology*; D013026:Space Flight; D013242:Sterilization / Q000379:methods* / Q000592:standards; D014466:Ultraviolet Rays; D014871:Water Microbiology
chemical_list: D003470:Culture Media; D005609:Free Radicals; D010126:Ozone; D006861:Hydrogen Peroxide