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    • 10. 发明专利
    • WATER PURIFICATION METHOD UTILIZING FLOATING RICE
    • JP2000024688A
    • 2000-01-25
    • JP19602198
    • 1998-07-10
    • TAISEI CORP
    • YOSHIDA MITSUTAKEENDO NOBORU
    • C02F3/32
    • PROBLEM TO BE SOLVED: To make it possible to make the water of rivers, lakes and ponds friendly to the environment and to efficiently clean the same by removing the nitrogen and phosphorus in the water by floating rice which is easily controllable in growth. SOLUTION: The roots of seedlings of floating rice, water hyacinths, rushes, cattails, ditch reeds, etc., are inserted into holes bored at light flat boards and these flat boards are floated on the water surface in the beginning. The flat boards are hung by cords and are gradually sunk down to a water depth of 2 to 3 m as the floating rice, etc., grow, thereby allowing stems to extend and increasing the roots from nodes. The lengths of the floating rice, etc., are adjusted according to the depths of the water in the manner described above, by which the nitrogen and phosphorus in the water are efficiently absorbed. As a result, the water of the rivers, lakes and ponds may be made friendly to the environment and purified efficiently.