Evaluating the drinking water quality through an efficient chlorine decay model

Abstract

The performance of a treatment plant in reducing chlorine consuming substances as well as total trihalomethane formation (TTHM) could be evaluated rapidly using an accurate chlorine decay model as used in this study. The model could estimate the concentrations of fast and slow reacting agents (FRA and SRA–including organic and inorganic substances) and fast and slow reacting nitrogenous compounds (FRN and SRN) that are present in test waters. By estimating those concentrations in source and treated waters one could evaluate the performance of the treatment plant as well as provide options such as better catchment management for source water protection or treatment upgrades (e.g. enhanced coagulation) to remove chlorine consuming compounds which also have the potential to form THMs.

Effectiveness of parallel second order model over second and first order models

“…Realizing the need for having a more accurate modelling approach for chlorine decay prediction, some researchers started to apply the parallel second order model for the assessment of the effects of different treatment processes on the chlorine decay profile [8,9,11].…”

Rapid water quality characterization for chlorine demand and THM formation in drinking waters

“…A model considering the initial rapid decay due to fast reducing agents (FRA) such as inorganic and organic compounds as well as fast reducing nitrogenous compounds (FRN) and the continuing slow decay due to slow reducing agents (SRA) and slow reducing nitrogenous compounds (SRN) is used in this study (Kastl et al 1999(Kastl et al , 2003 (Kastl et al1999(Kastl et al , 2003 and has been applied for various waters in Australia and Korea to provide rapid characterization of the quality of those waters ( Jegatheesan et al 2006).…”