Production of toxic trihalomethane in chlorinated drinking water flowing through conduit

Trihalomethane (THM) are chemical species commonly found in drinking water and are known to be toxic (mutant and carcinogenic). In order to estimate t he production of THM species in chlorinated drinking water during the distr ibution to the consumers, a mathematical model considered Adin's reaction k inetics for THM production and the transport phenomena for pipe flow has be en constructed. With use of the model, THM levels in drinking water flowing through conduits have been simulated numerically. The results of numerical simulations shows that: (1) THM formation rate is highly dependent on the chlorine concentration given at the inlet of condui ts, i.e., THM level rises with increasing chlorine dose; and (2) The primar y factor controls the production of THM during the transportation is the de tention time of the conduit, i.e., the more the flow rate decreases, the gr eater the THM production is.