| 摘要 |
PROBLEM TO BE SOLVED: To provide an industrial polluted water treatment method and apparatus capable of treating polluted water efficiently and safely. SOLUTION: A treatment tank 2 for once storing polluted air 6, an ozone generator 7 for supplying ozone-containing air to the polluted water 6 in the treatment tank 2, the air supply pipe 8 connecting the ozone generator 7 and the treatment tank 2, a fine air bubble generator 9 for finely dividing the ozone- containing air supplied to polluted water 6 through the air supply pipe 8 into fine air bubbles, an ultraviolet source 10 for irradiating polluted water 6 with ultraviolet rays wherein at least a part of a wavelength is within a range of 240 to 320 nm and a photocatalytic treatment device 12 for photocatalytically decomposing the gas of a gaseous phase portion in the treatment tank 2 are provided. By this constitution, org, matter contained in polluted water can be efficiently decomposed by ozone-light composite oxidation and a harmful substance or byproduct gasified in an ozone-light composite oxidative decomposition process can be decomposed in a gaseous phase by a photocatalyst to be detoxified.
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