Enhancement of Water Purification Ability by the Combination of Benthic Animals, Trichoptera and Reeds, <i>Phragmites japonica</i> or Watercress, <i>Nasturtium officinale</i>

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  • AMAKAWA TAKUYA
    Materials Science and Engineering, Graduate School of Engineering, Hiroshima Kokusai Gakuin University
  • YASUMITU YOSHIFUMI
    Research Institute of Senogawa Aquatic Environment
  • TAKENO KENJI
    Materials Science and Engineering, Graduate School of Engineering, Hiroshima Kokusai Gakuin University
  • SASAKI KEN
    Materials Science and Engineering, Graduate School of Engineering, Hiroshima Kokusai Gakuin University

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  • 底生動物、Trichopteraとツルヨシ、<i>Phragmites japonica</i>あるいはクレソン、<i>Nasturtium officinale</i>の組み合わせによる水質浄化能の促進
  • Enhancement of water purification ability by the combination of benthic animals, Trichoptera and reeds, Phragmites japonica or watercress, Nasturtium officinale

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Abstract

A bench scale artificial water purification system with the combination of a benthic animal (Trichoptera) and reeds (Phragmites japonica) or watercress (Nasturtium officinale) was established. When 30 solid bodies of a kind of benthic animal were present, phosphate concentration in water was about 1/5 with reed and 1/2 with watercress and total nitrogen concentration were about 1/6 to 1/3 with each reed and watercress compared with the control experiment without benthic animals after one month of treatment. It was confirmed in artificial water purification system that the combination with benthic animals and reed or watercress enhanced the purification ability especially in phosphate and nitrogenous compound removal.

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