| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a nitrate nitrogen treatment apparatus capable of simply removing nitrate nitrogen in a large-sized water tank or a closed system such a lakes and marshes or the like at a low cost. SOLUTION: The nitrate nitrogen treatment apparatus, which is constituted so that a water stream generation member like an air bubble generator is provided and a nitrate nitrogen removing material bed comprising a sulfur/ calcium carbonate component is arranged on the way of a water stream route formed from the water stream generation member and, if necessary, a dissolved oxygen lowering member comprising a water permeable material is arranged in the periphery thereof, is sunk in a system wherein water to be treated is housed in a water tank or the like to perform denitrification.</p> |
