| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce a cost required for a coagulation treatment while controlling quality of treated water to a target value. <P>SOLUTION: A device for controlling a chemical injection 18 predicts the quality of treated water when injecting PAC and powdered activated carbon under a plurality of injection ratio conditions using a neural network, calculates, on a plurality of injection ratio conditions, using the predicted quality of the treated water, the value of an evaluation function containing as a parameter at least a cost for using the PAC and powdered activated carbon and the degree of deviation between a predicted value and the target value of the quality of the treated water, decides the most appropriate injection ratio conditions of the PAC and powdered activated carbon based on the calculated value of the evaluation function, and injects the PAC and powdered activated carbon to raw water under the decided injection ratio conditions. The cost required for the coagulation treatment can be reduced while controlling the quality of the treated water to the target value. <P>COPYRIGHT: (C)2013,JPO&INPIT |
