METHOD OF PRODUCTION OF HIGH-QUALITY POTABLE WATER Russian patent published in 2007 - IPC C02F9/04 C02F1/78 C02F103/04 

FIELD: production of potable water by extensive treatment and decontamination of water from weakly mineralized underwater sources by means of ozone sorption and vacuum ejection technique.

SUBSTANCE: proposed method includes filtration of starting water in grain filtering material, ozone treatment and regeneration of filtering material. Filtration is performed in four stages: at the first stage - through polymer sand grain material; at the second and third stages - through carbon grain material and at the fourth stage - through polymer material. Ozone treatment of water is also performed in four stages: at the first stage ozone treatment is performed with unreacted part of ozone-air mixture obtained after second and third stages of ozone treatment. Ozone treatment of polymer sand grain material is performed by ozone-air-water mixture obtained after ejector ozone treatment of starting water; at the second stage, ejector and reactor bubbling ozone treatment is performed by ozone-air-water mixture obtained after the first stage of ozone treatment. Circulating treatment of ozone-air-water mixture obtained after ejector ozone treatment of the second stage and ozone treatment of carbon grain material at capacity of pores of 0.5-1.0 cm³/g is performed by ozone-air-water mixture obtained after second stage of ozone treatment. At the third stage, use is made of ejector and reactor bubbling ozone treatment of ozone-air-water mixture obtained after the second stage of ozone treatment. Circulating treatment of ozone-air-water mixture obtained after ejector ozone treatment of the third stage and ozone treatment of carbon grain material at capacity of pores of 0.05-0.5 cm³/g and polymer disposable material at size of pores of 1.2 mcm is performed with ozone-air-water mixture obtained after the third stage of ozone treatment. At the fourth stage, use is made of ejector ozone treatment of ozone-air-water mixture obtained after the third stage of ozone treatment. During the last stage of ozone treatment, finish decontamination of containers, preservation of water and saturation of water with oxygen are performed. Regeneration of grain filtering material is performed in three stages. At the first stage, polymer sand grain material is subjected to back washing with ozone-air-water mixture obtained after the second stage of ozone treatment. At the second and third stages, carbon grain material at capacity of pores of 0.5-1.0 cm³/g and carbon grain material at capacity of pores of 0.05-0.5 cm³/g are subjected to back washing with ozone-air-water mixture obtained after the third stage of ozone treatment. Control of duration of circulating processes at the second and third stage of ozone treatment is performed depending on level of oxidizing-reducing potential of ozone-air-water treated at these stages.

EFFECT: high quality of water; protracted storage of water; enhanced sanitary and epidemiologic reliability of water treatment processes.

1 dwg