| 摘要 |
<p>PROBLEM TO BE SOLVED: To fix the eutrophication components of the deep part of the objective water to which the sunlight can fall to aquatic plants which make photosynhesis in the objective water to purify the water and to suppress the generation of water blooms, moss, algae and mold by providing the above deep past with means for supplying carbon dioxide and the aquatic plants described above. SOLUTION: Plant beds 3 housed in a container 2 are positionally variably fixed to plural vertical columns 4 and are arranged in the middle layer in the deep part of an objective water surface 1. The plant beds 3 contain necessary nutrients and the aquatic plants 5 are planted thereto. A carbon dioxide container 7 has a carbon dioxide inlet 9 and a gas outlet 11 and a gas permeable membrane 8 is fixed to a lower open part. The carbon dioxide container 7 is fixed to the vertical columns 4. The vertical columns 4 are fixed to a bottom 6. The aquatic plants 5 are put into the state that the aquatic plants are irradiated with the sunlight. The dissolved gas in the container 2 is replaced with the carbon dioxide by intermittently opening a valve 12. In this state, the aquatic plants 5 grow by absorbing the neiborhood eutrophication components and purify the water by fixing the eutrophication components. The generation of the water blooms, moss, algae and mold is suppressed.</p> |
