ヨシ根圏に形成された微好気環境における無機態窒素除去

概要

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The water purification ability of the reed has been noticed as one of the water quality conservation technologies of public waters. In this study, the mechanism of inorganic nitrogen removal in the microaerobic condition of the reed rhizosphere was examined through the laboratory experiments to establish the technique which efficiently carried out the removal of nutrients in waters.Oxygen from the above-ground was supplied into the rhizosphere of the reed, which formed gradually the microaerobic condition and raised the oxidation-reduction potential (ORP) to the range of 0 to 300mV, in comparison with the range of-400 to-200mV in the soil without the vegetation of the reed.It became clear that the supply and the consumption of dissolved oxygen was excellent in the daytime and at night, respectively.It was shown that the delicate difference between the aerobic and the anaerobic condition of the rhizosphere which the light condition of the above-ground brought about affected the intake of the nutrients, the nitrifiication and the denitrification in the rhizosphere of the reed.
福島工業高等専門学校の論文