| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a nitrate nitrogen treatment material which has high denitrification capacity and is easily maintained, and a nitrate nitrogen treatment method which removes nitrate nitrogen in waste water efficiently. <P>SOLUTION: In the nitrate nitrogen treatment material for denitrification by biological treatment using nitrate nitrogen denitrifying bacteria comprising a solid material integrating main materials, 50-99 wt% of a sulfur component and 0.1-30 wt% of biodegradable organic compounds, it is preferable that the nitrate nitrogen denitrifying bacteria are autotrophic bacteria or both autotrophic bacteria and heterotrophic bacteria and that the biodegradable organic compounds are carbohydrates, proteins, or biodegradable plastic, especially starch or grain containing starch as a main component. The nitrate nitrogen-containing waste water is treated by contacting it with the nitrate nitrogen treatment material in presence of the nitrate nitrogen denitrifying bacteria. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
