Determination of thmfp of the reservoirs in Turkey : kinetics aspect

Artuğ, Mine
Chlorine is still the most commonly used disinfectant in many water treatment plants all over the World. However, studies conducted demonstrated that the chlorine reacts with the natural organic matter (NOM) in source waters, and leads to the formation of a variety of chlorinated organic compounds, disinfection by-products (DBPs). Among these, the most common are the trihalomethanes (THMs). In this study, kinetics of the THM formation was investigated. Kinetic experiments were carried out with the raw waters from Devegeıdi and Atatürk Reservoirs as well as with water containing a model compound, humic acid. THM and Chlorine concentrations were measured for 6 weeks on a seasonal basis. The simulation model developed by USEPA was used for predicting THM concentrations. The results of this study have shown that THM formation increases with increasing time and higher chlorine doses result in higher THM formation. Also, higher organic matter concentrations resulted in higher chlorine demands and both these parameters increased the TTHM concentrations. But, on the contrary to the standard THMFP testing, THM formation did not complete in seven days. In addition, THM formation and chlorine consumption were very rapid during the first 24 hr followed by a more gradual formation and decay after 24 hr. THM formation rates ranged between 35-66 æg/ for Atatürk Reservoir, between 80-167 æg/ for Devegeıdi Reservoir and between 85-248 æg/ for humic acid during the first 24 hr, and ranged between 2-6 æg/ for Atatürk Reservoir, between 7-16 æg/ for Devegeıdi Reservoir and between 3-14 æg/ for humic acid after 24 hr.


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Citation Formats
M. Artuğ, “Determination of thmfp of the reservoirs in Turkey : kinetics aspect ,” M.S. - Master of Science, Middle East Technical University, 2004.