| 摘要 |
PROBLEM TO BE SOLVED: To automatically set a necessary neutralization chemical amount in regard to a waste water neutralization system. SOLUTION: In the waste water neutralization system, neutralization of waste water is carried out by injecting a neutralization chemical into the waste water stored in a neutralization tank 1 under control by a controller 10. A waste water amount detector 7 is provided for measuring an amount of the waste water in the neutralization tank, and a pH detector 8 is provided for measuring pH of the waste water in the neutralization tank. The controller is provided with a necessary neutralization chemical amount calculating part 17 calculating a neutralization chemical amount necessary for the neutralization of the waste water in the neutralization tank from the amount of the waste water and the pH, and the controller controls injection of the neutralization chemical to the neutralization tank on the basis of the necessary neutralization chemical amount determined by the necessary neutralization chemical amount calculating part. COPYRIGHT: (C)2006,JPO&NCIPI
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