| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a pH adjusting system capable of recovering carbon dioxide in the atmosphere and using recovered carbon dioxide to perform the pH adjustment of a water treatment plant. <P>SOLUTION: The pH adjusting system is equipped with a carbon dioxide recovery and concentration device 5 for recovering carbon dioxide in the atmosphere to concentrate the same, a carbon dioxide injection device 8 for injecting the carbon dioxide from the carbon dioxide recovery and concentration device 5 in the carbon dioxide injection part 10 of the water treatment plant and a control part 6 for controlling the carbon dioxide injection device 8. The signals from a raw water flowmeter 2, a raw water pH meter 3 and a treated water pH meter 11 are input to the control part 6. The control part 6 calculates the carbon dioxide injection ratio or carbon dioxide injection amount from the carbon dioxide injection device 8 on the basis of the signals from the pH meters 3 and 11 and a target pH value to control the carbon dioxide injection device 8. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
