Water treatment, desalination, and purification plants; water treatment, desalination, and purification equipment, namely chemical sterilization units, for injecting hydrogen peroxide, ozone and other chemicals and compounds into contaminated waters; water treatment, desalination, and purification units using oxidation for domestic, commercial and industrial use; water treatment, desalination, and purification units featuring filtration and membrane technology; water treatment equipment, namely water filtration units for removing nitrates and other water contaminants using hydrogen and biological organisms for domestic, commercial and industrial applications; water filters featuring membranes and membrane units for water treatment apparatus; water filters for water treatment apparatus for the filtration of substances from waste water and treatment of water for use in domestic, commercial, military, and industrial applications; water desalination and purification installations; water purification and filtering units; water treatment equipment, namely, reverse osmosis filtration units; bioreactor system comprised of high density biomass reactor and ultrafiltration unit having a membrane concentrator, for use in purification and disinfection of water; nano water filtration units; water filtering apparatus for separation and filtration of liquid and gaseous media