| 摘要 |
PROBLEM TO BE SOLVED: To remove a smell by using a photo catalyst as a cost is reduced. SOLUTION: A concrete upper cover 14 arranged in such a manner to cover the upper part of a water channel 12 wherein pollution of flowing drain L is serious has an opening part 16 and the opening part 16 is filled with a photo catalyst fixing sheet 18, which is supported. A photo catalyst fixing sheet 20 is mounted on the whole surface of the lower part of the concrete upper cover 14 and supported. The photo catalyst fixing sheets 18 and 20 are formed in such a manner that a photo catalyst fixing glass fiber formed by fixing titanium oxide and zinc oxide are fixed on the surface of a cotton-form glass fiber is brought into a sheet-form state. |
