DEVICE FOR CONTROLLING WATER QUALITY

摘要

PROBLEM TO BE SOLVED: To provide a device for controlling water quality in which proper treatment to remove the water quality component can be efficiently performed at a low cost even when the concentration of the water quality component is remarkably changed in the objective water. SOLUTION: The device 1 for controlling the water quality is equipped with an aeration tank 3 having a treating mechanism 6 for the water quality component to remove the component in the objective water, and a first settling tank 2 is connected to the aeration tank 3. A second settling tank 4 is connected to the aeration tank 3, and a controlling device 5 is connected to the treating mechanism 6 of the water quality component. The first setting tank 2 is provided with an oxidation reduction potential meter 7 and the potential meter 7 is disposed in the preceding stage than the aeration tank 3. The aeration tank 3 is composed of an anaerobic part 3a, a non-oxygen part 3b and an aerobic part 3c. The treating mechanism 6 for the water quality component has a blower 11, an air distribution pipe 15 disposed in the aerobic part 3c, an air pipe 14 to connect the blower 11 and the air distributing pipe 15, an electric valve 12, and an air flow meter 13. The controlling device 5 has an operational part 23 to estimate the quality of the supplied water, an operational part 21 to determine the target value of the airflow, and a controlling part 22 of the airflow.