| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To efficiently remove nitrate nitrogen contained in ground water at a low cost. <P>SOLUTION: A purification measure 1a for a water source is configured to solidly form a water purification material having denitrification action, water permeability and gas permeability, and has a pumping pipe or a drain pipe inserted into the water purification material. The purification measure 1a for the water source may be produced by the water purification material having denitrification action and water permeability. Specifically, it is produced by a method wherein lime, sulfur, and sulfur oxidizing bacteria are mixed, or a sludge solidified body in which cement-containing alkaline sludge is solidified by the solidification action of the cement, sulfur and sulfur oxidizing bacteria are mixed, or alkaline sludge containing cement being a hydraulic material, sulfur and sulfur oxidizing bacterial are mixed before the solidification of the alkaline sludge. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
