COD VALUE ACQUISITION METHOD, COD VALUE DETECTION DEVICE, AND EFFLUENT TREATMENT FACILITY

摘要

PROBLEM TO BE SOLVED: To accurately detect a COD value.;SOLUTION: Provided is a method for acquiring, while generating a mixed treated water of first and second treated water in a treatment tank by supplying second treated water to the treatment tank in which first treated water is accommodated, a Chemical Oxygen Demand (COD) value in a treatment tank that discharges the same amount of mixed treated water as the second treated water supplied, the method including: a step of acquiring the absorbance and COD value of the first treated water on the basis of preset reference absorbance and reference COD value of the first treated water and the dilution rate of the first treated water in the mixed treated water; a step of calculating the absorbance of the second treated water from a difference between the measured absorbance of the mixed treated water and the absorbance of the first treated water, and acquiring the COD value of the second treated water on the basis of the absorbance of the second treated water; and a step of acquiring the COD value of the mixed treated water by adding the COD value of the first treated water and the COD value of the second treated water together.;COPYRIGHT: (C)2015,JPO&INPIT