Power plant uses total residual oxidant analyzer to maintain cooling water discharge compliance
Power plant uses total residual oxidant analyzer to maintain cooling water discharge compliance
5 PagesPower plant uses total residual oxidant analyzer to maintain cooling water discharge compliance Background Personnel at the power plant had tried various online analyzers and laboratory methods to measure TRO concentration in their cooling water. However, the local river water used for cooling water makeup has high concentrations of organic matter and turbidity, which interferes with colorimetric measurement of N, N-Diethyl- 1.4-Phenylenediamine Sulfate (DPD) method. The cooling water makeup water compositions are listed in Table 1. If free and total chlorine (TRO) concentrations are higher than the discharge permit, then the plant is required to quench the TRO with oxygen scavenger, e.g. sodium bisulfite, at an appropriate corresponding concentration based on their TRO measure
