METHOD AND APPARATUS FOR NITRATING WASTE WATER AND ACTIVITY DETECTOR

摘要

PROBLEM TO BE SOLVED: To provide the subject method and apparatus capable of obtaining proper nitration capacity in nitration treatment in a nitration tank and capable of ensuring proper aeration quantity and achieving the conservation of energy and an activity detector capable of reducing the damage of a carrier to the most. SOLUTION: The NH4-N concn. in a nitration tank 16 and the nitration speed of a carrier 11 are measured and, when the measured NH4-N concn. is 0.3 mg/l or more, the aeration quantity from a blower 18 is increased to adjust the concn. of dissolved oxygen in the nitration tank 16 to maximize a nitration speed. When the NH4-N concn. is less than 0.3 mg/l, the aeration quantity is reduced so as to return the NH4-N concn. in the nitration tank to 0.3 mg/l and the nitration speed is again controlled based on DO concn.