Application Note

Disinfection By-Products (DBP) Precursor Monitoring

Source: Real Tech Inc.

Chlorine has long been used as a primary disinfection method for many water and wastewater treatment applications. However, there is growing concern about the harmful DBP’s produced by the use of chlorine.

DBP's, such as triahalomethanes (THMs), can occur when the natural organic matter (NOM) that is present in the water is combined with chlorine. More specifically, the portion of NOM in the water that is aromatic is the most reactive with chlorine and therefore possesses the most potential for DBP formation. The following provides an illustration of this reaction.