| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a low temperature denitrification material having excellent capacity for treating nitrate nitrogen in water even in a low temperature environment like the winter season, and a denitrification method. SOLUTION: A molten mixture comprising sulfur and an inorganic material comprising a calcium carbonate component is used as a substrate and autotrophic sulfur oxidizing and denitrifying bacteria are cultured on the substrate at 1-10 deg.C for two or more days to be fixed to the substrate to obtain the denitrification material 2 for treating nitrate nitrogen in low temperature water. Waste water A containing nitrate nitrogen is allowed to flow through a device 1 filled with the denitrification material 2 to be brought into contact with the denitrification material 2 to be denitrified.</p> |
