| 摘要 |
PURPOSE:To prevent the pollution of water, by providing a large number of strip like thin pieces made of a synthetic resin in a flowline of water to be purified in a floating state and a biological film comprising algae or filamentous fungi to the surfaces of thin pieces to remove nutritive substances in waste water. CONSTITUTION:A purification water channel is formed in a water channel of water to be purified such as industrial waste water or living waste water by using a synthetic resin or concrete. A support frame 2 is traversely constructed over the water channel 1 and not only a large number of plate shaped vertical frames 2a are suspended into waste water but also one ends of strip like thin pieces 4 comprising polyethylene are respectively fixed to said vertical frames 2a. Floats 5 having various shapes are provided to one side of each thin piece 4 and, by said floats 5, the thin piece 4 is fixed so as to be floated in flowing water of the water channel 1. As a result, a biological film comprising algae or filamentous fungi absorbing or adsorbing and decomposing org. substances in waste water is naturally generated to the surface of each thin piece 4 to reduce to pollution of waste water.
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