WATER SUPPLY PLANT Russian patent published in 1998 - IPC

FIELD: water supply systems. SUBSTANCE: feed water is admitted to water clarification unit. Preliminarily, before feed water is admitted in this unit, clarified 10-% coagulant solution is added through proportioning pump into pipeline. Partially purified water after clarification treatment may still contain difficult-to-oxidize impurities, as determined by oxidability analyzers, and pathogenic bacteria and viruses. Therefore it is subjected to additional treatment in above-filter space of filter with ozone/air mixture produced by ozone generator, and then irradiated with ultraviolet rays in ultraviolet radiation unit. Additional treatment of water with ozone and ultraviolet rays is carried out only if necessary. Necessity is determined automatically by means of analyzers in proximate analysis laboratory. If such necessity is partial or absent, clarified water either is not ozonized, or treated only with ozone or only with ultraviolet rays, or directed over pipeline directly to sorptive charcoal filter to undergo intensive tertiary treatment. After sorptive filter, water is directed under pressure over pipes to pure water reservoir to be pumped from it by pumps and supplied to water main in accordance with hourly water consumption schedule of individual water consumer. Automatic working regime of all units for clarifying and supplying the water is maintained by special instruments and electronic control system mounted in control cabinet. EFFECT: higher efficiency. 1 dwg