Since the introduction of the total Trihalomethane (TTHM) rule in 1989, many surface water treatment plants and systems that have natural organics in their water supply are adding low dosage levels of Ammonia to comply with Stage 2 Disinfectants and Disinfection By Products Rule (Stage 2 DBP). When low levels of ammonia are added to the chlorinated system, chloramines are produced. Chloramines are a secondary disinfectant and produce less of the disinfection by-products trihalomenthanes [THMs] and haloacetic acids [HAA5]. Chloramines are produced when free chlorine combines with ammonia.
MCT 4119 is a specially engineered product that combines ammonia and polyphosphate in a single product. When it is applied to the system chloramines are produced and the potential to form disinfection by-products are reduced. Since free chlorine reacts with ammonia, less chemical reactivity is exerted on iron and manganese to produce red or black water in the system. However, where these contaminants or high scale potential water occurs, a polyphosphate is needed to stabilize these constituents. MCT 4119 is an excellent product to help provide system compliance for Stage 2 DBP and control troublesome system contaminants.