METHOD AND APPARATUS OF COD CONCENTRATION SIMULATION IN BIOLOGICAL AEROBIC TREATMENT OF AMMONIACAL LIQUOR

摘要

PROBLEM TO BE SOLVED: To provide a method of COD simulation capable of estimating a COD concentration in treated water after biological aerobic treatment of ammoniacal liquor generated in a coke production process and an apparatus thereof.

SOLUTION: The method includes: an analysis step for measuring to analyze each known component concentration and soluble COD concentration contained in the ammoniacal liquor; a known component COD fraction step for determining the COD concentration of each known component from the analyzed value of each known component concentration; a step for determining a hardly decomposable COD concentration beforehand; a step for determining an unknown component COD concentration contained in the ammoniacal liquor; a step for setting the type and the concentration of microorganisms, and growth yield, saturation constant and maximum specific growth rate to be a stoichiometry parameter; a step for measuring the dissolved oxygen concentration; a step for calculating each known component COD concentration and unknown component COD concentration remaining in treated water from information obtained from each step by predetermined calculation; and a treated water COD concentration calculation step for calculating a remaining soluble COD concentration by adding the hardly decomposable COD concentration to each calculated remaining known component COD concentration and unknown component COD concentration.

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