ABSTRACT Using a continuous excitation-emission matrix (EEM) monitor, EEM data were collected at each treatment process, and the relationship between component changes identified by PARAFAC analysis and water quality data was evaluated. At water treatment plants using surface water as raw water, the raw water quality constantly fluctuates. To supply tap water of stable quality, it is important to understand and respond to water quality fluctuations in the water purification and treatment process. The dissolved organic matter (DOM) in water is composed of various types of compounds, and thus, the treatability of DOM is dependent on its composition. In this study, the behavior of DOM during the drinking water treatment processes was analyzed using three-dimensional fluorescence spectroscopy (excitation-emission matrix). The results showed that treated water at Plant A was composed of three types of organic matter, and among them, the seasonal variation of protein-like substances was large. Furthermore, the results showed that the type of easily removed organic matter is dependent on the water treatment.
KAWAGUCHI et al. (Thu,) studied this question.