| abstract |
(57) [Abstract] [Problem] A structure with high safety and a simple structure, suitable for a scenic pond, an artificial pond in a water park, a waterway, etc., which has a good water treatment efficiency and a high energy supply. Provided is a water treatment device which does not require complicated maintenance. A water treatment device (10) has a water channel (16) having a height difference and water discharged from a drainage port (14) at a lower part of the water channel (16). Pump 1 that circulates water by sending it to the water supply port 12 at the high part of 8 and the gravel 22 having titanium oxide having a photocatalytic function carried on the surface is disposed at the bottom of the water channel 16, and a light collector 24 for reflecting and concentrating sunlight on the titanium oxide is provided in the vicinity of the water channel 16. It is arranged. The water channel 16 is a water level adjusting weir 2. It forms a multi-stage waterway divided by 6, and the waterway 16 A black light 28, which is supplied with energy from a solar cell 32 arranged in the vicinity of the water channel and irradiates ultraviolet rays to the gravel 22 carrying titanium oxide, is embedded in the bottom of the. |