FIELD: purifying sewage. SUBSTANCE: sewage is treated by oxidation agent (e. g. ozone). The process is followed by pulse UV-irradiation, duration of pulse being 10-6 - 10-3 s, density of irradiation being at least 100 kWt/m2. EFFECT: improves purification, decreases duration of the process and energy expense. 3 cl, 3 tbl
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