| 摘要 |
<P>PROBLEM TO BE SOLVED: To optimize amount of aeration of an aerobic cell in a water treatment system provided at a sewage treatment facility. <P>SOLUTION: The water treatment system (1) includes: a series of biological reaction cells (10) which have the aerobic cell (5) provided with an aeration device (9) and performs water treatment based on an activated sludge method; a first ammonia gauge (32) which measures ammoniacal nitrogen concentration of activated sludge-mixed liquid in the aerobic cell (5); a second ammonia gauge (33) which measures ammoniacal nitrogen concentration of treated water after treatment in a series of biological reaction cells (10); an aeration amount calculation part (41) which produces a target operation amount of the aeration device (9); and an aeration amount controlling part (91) which controls aeration amount of the aeration device (9) based on the target operation amount. The aeration amount calculation part (41) produces a target operation amount signal based on a deviation between the ammoniacal nitrogen concentration of the activated sludge-mixed liquid in the aerobic cell (5) and an ammoniacal nitrogen concentration set value of the activated sludge-mixed liquid in the aerobic cell (5) corrected in accordance with ammoniacal nitrogen concentration of treated water. <P>COPYRIGHT: (C)2013,JPO&INPIT |
