| abstract |
(57) [Problem] To provide a water treatment apparatus capable of effectively suppressing clogging of a filtration membrane and efficiently decomposing water containing organic matter. SOLUTION: A water treatment apparatus 1 for filtering water containing an organic substance by using a filtration membrane 2, and irradiating a powdery photocatalyst mixed with the water and a mixed water 13 of the water and the photocatalyst. A gas supply device 6A, 6A for supplying a gas to the light source 3 for emitting light and the filtration membrane 2 to stir the mixed water 13 B, and the gas supply devices 6A and 6B are provided with porous diffused gas 31 to 33. |