| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a treatment method for treating ammonia-containing drainage including a high-concentration organic substance such as livestock excretion, ammonia, and urea without using a strong acid and a strong alkali while also suppressing the generation of an odor. <P>SOLUTION: This treatment method is employed to remove a nitrogen content by loading the ammonia-containing drainage with magnesium chloride and phosphoric acid, synthesizing MAP (MgNH<SB>4</SB>PO<SB>4</SB>-6H<SB>2</SB>O: ammonium magnesium phosphate), and carrying out slid-liquid separation of this. It is desirable that the ammonia-containing drainage is hydrothermally treated at temperatures of 260 to 300°C for 15 to 60 minutes to decompose urea before MAP is synthesized. Thus, if a BOD is removed from the ammonia-containing drainage from which the nitrogen content is removed further by a normal activated sludge method, the drainage can be discharged to a river. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
