Modeling of THMs and HAAs Formation in Distribution System upon Chlorination

Abstract:

Seasonal variations of trihalomethanes (THMs) and haloacetic acids (HAAs) were investigated within distribution systems of the Yangtze river treatment plant in Nanjing City (China).The investigation was based on one year sampling program, undertaken from the fall and winter of the year 2007 to the spring and summer of the year 2008. A multiple linear regression model was developed to predict THMs and HAAs concentrations in distribution water. Routinely measured parameters including free residual chlorine, ultraviolet light absorbance at 254 nm (UV254), temperature, pH and NH3-N in distribution water was used to develop the model for the prediction of THMs and HAAs. The developed models provided satisfactory estimations of the concentrations of THMs and HAAs and the model regression coefficients of THMs and HAAs are 0.90 and 0.87, respectively. Further, the Durbin-Watson values confirm the reliability of the two models. The results indicate that variations of free residual chlorine, ultraviolet light absorbance at 254 nm (UV254), temperature, pH and NH3-N can described the formation of THMs and HAAs in distribution water by the multiple linear regression technique.

• Periodical: Advanced Materials Research (Volumes 455-456)
• Pages: 1273-1277
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.455-456.1273
• Online since: January 2012
• Authors: Rong Ma, Xi Wu Lu
• Keywords: Haloacetic Acids (HAAs), Modeling, Trihalomethanes (THMs)

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