| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a wastewater treatment apparatus which can partly nitrify ammonia while achieving energy saving. <P>SOLUTION: The wastewater treatment apparatus 10 for partly nitrifying ammonia nitrogen in organic waste water to remove nitrogen includes: an aerobic tank 26 for generating nitrified water by nitrifying ammonia in wastewater using nitrifying bacteria; a first oxygen-free tank 24 provided on a front stage of the aerobic tank 26, one part of the nitrified water from the aerobic tank 26 is sent back, and the denitrifying treatment is applied to the nitrified water by denitrifying bacteria; a second oxygen-free tank 28 provided on a rear stage of the aerobic tank 26, one part of the nitrified water from the aerobic tank 26 is sent, the denitrifying treatment is applied to the nitrified water by denitrifying bacteria, and the water is sent to the rear stage as treated water; a distribution line 20 for distributing the waste water to the first oxygen-free tank 24 and the second oxygen-free tank 28; and a distribution means 22 provided on the distribution line 20 for adjusting an amount of the water distributed to the first oxygen-free tank 24 and the second oxygen-free tank 28. <P>COPYRIGHT: (C)2013,JPO&INPIT |
