Controlling Parameters in Water Analysis

The COD (Chemical Oxygen Demand) is one of most important parameters in water analysis. In Germany as in nearly all European countries tax for indirect discharges is based on the COD. Using the oxygen consumption is reasonable in the case of tax because the delay time of waste water in a treatment plant depends mainly on its biological activity. The oxygen consumption again is a degree of biological activity. To determine the biological oxygen demand would be best suitable, but determination of this parameter is even more extensive compared to measurement of COD.

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