METHOD FOR PURIFYING FILTRATES OF SOLID WASTE DISPOSAL SITES

摘要

The invention relates to methods for purifying municipal wastewater and industrial wastewater. A method for purifying filtrates from solid waste disposal sites includes sequentially carrying out the steps of preliminary purification of filtrates, the steps of preliminary filtering of reagents, subsequent settling, filtering and draining of the solution obtained into a sewer or a surface reservoir. After preliminary purification, the filtrates undergo ultrafine filtering. After passing through ultrafine filtering, the filtrates undergo chemical purification. Slaked lime is used as a reagant. After settling, the clarified filtrate is passed under pressure through a second ultrafine filtering filter. Purified filtrate is cooled to a temperature of +4 – +7 °С and sprayed in an oxidation reactor in a current of pure ozone synthesized in an oxidation reactor from oxygen cooled to a temperature of +4 - +7°С obtained from ambient air. A filtrate oxidation process continues until a required chemical oxygen consumption is reached. The invention enables intensifying the steps of purifying filtrates, and achieving maximum ozone saturation of the water solution, namely filtrate containing primarily phosphates, sulphates and complex organic compounds resistant to oxidation at the selected optimum temperature.