FIELD: water purification.
SUBSTANCE: invention in particular relates to the methods, as well as the devices for its purification using the ultrafiltration method, and is primarily intended for the purification of water with organic contaminants. The method of purification of water with organic impurities by ultrafiltration consists of preliminary preparation of water for ultrafiltration, which consists in ozonation and mixing by recirculation in a contact container, as well as in the process of ultrafiltration itself through membranes. At that, water is supplied to the ultrafiltration device simultaneously with the supply of an ozone-air or ozone-oxygen mixture through at least one water-jet ejector, a second recirculation cycle is organized through the ultrafiltration device into the contact container and again into the ultrafiltration device, a high-speed gas-liquid mode with a water-bubble flow around the membrane surface is installed in the near-membrane space of the ultrafiltration device, at that the water flow rate through the water jet ejector is set in the range from 0.5 to 45 m3/h, the flow rate of the ozone mixture is set in the range from 0.3 to 30 m3/h, and the pressure in the ejector discharge line is set in the range of values from 0.2 to 1.6 MPa. This method is carried out using a device that includes an ozonation device, a contact container, a recirculation line and an ultrafiltration device itself, as well as at least one water jet ejector at the inlet to the ultrafiltration device, in which the working diameter of the suction nozzle refers to the working diameter of the discharge line nozzle in the range values from 0.35 to 1.0.
EFFECT: reduced degree of pollution of the ultrafiltration membranes surface by products of organic impurities oxidation, which leads to an increase in the efficiency of water purification.
7 cl, 1 dwg, 4 ex
