| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To efficiently remove nitrate nitrogen from groundwater at a low cost. <P>SOLUTION: The subject water cleaning structure 1 is constructed by burying an underground continuous wall-form water cleaning body 4 in the permeable layer 3 of ground 2. Here, the permeable layer overlies a impermeable layer 5, and groundwater flows through the permeable layer from right to left in the figure. The water cleaning body 4 is buried perpendicularly to the ground 2 so as to rectangularly cross such underground stream and reaches the impermeable layer 5 at its lower end. The water cleaning body 4 is constructed by mixing an alkaline waste mud containing cement being a hydraulic material with sulfur and sulfur oxidation bacteria before solidification of the alkaline sludge. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
