| 摘要 |
<p>PURPOSE:To stabilize the quality of treated water by sampling a liquid mixture, detecting the oxygen consumption rate of the sampling liquid and providing a set value computing section. CONSTITUTION:Nit-Kr is detected in an oxygen consumption rate detecting section 2 and Nit-Kr is determined in a target value computing section 3. The relative data of the Nit-Kr and concn. of ammoniac nitrogen is stored for each of water temps. in a target value setting section 4. A water temp. detecting section 18 detects the water temp. and inputs the measured water temp. value to the target value setting section 11. The target value of the Nit-Kr is outputted by using this relational data. The deviation between the target value and the Nit-Kr outputted by the target value computing section 3 is taken out in the set value computing section 5 from which the process control set value is outputted according the deviation. The saving of manpower is attained in this way.</p> |
