MATEC Web Conf.
Volume 280, 2019The 5th International Conference on Sustainable Built Environment (ICSBE 2018)
|Number of page(s)||7|
|Section||Livable Rural and Urban Environment|
|Published online||08 May 2019|
Characteristics of dissolved organic matter in a water purification plant and distribution pipes
1 Faculty of Engineering, Gifu University, 501-1193, Gifu, Japan
2 Graduate School of Natural Science and Technology, Gifu University, 501-1193, Gifu, Japan
3 Graduate School of Engineering, Gifu University, 501-1193, Gifu, Japan
4 Aichi Public Enterprise Bureau, Aichi Prefecture, 470-0151, Aichi, Japan
5 River Basin Research Center, Gifu University, 501-1193, Gifu, Japan
* Corresponding author: firstname.lastname@example.org
Dissolved organic matter (DOM) needs to be characterized todetermine the ability of a water treatment unit to reduce organic matter andits relationship to the levels of chlorine required for disinfection. Weinvestigated water quality parameters, including DOM, in a waterpurification plant and distribution pipes located in central Japan. Thedissolved organic carbon (DOC) concentration decreased from 0.73 mg/Lin raw water to 0.50 mg/L in purified water by conventional treatmentprocesses. The DOC of purified water decreased slightly in the pipesdownstream of the plant. The three-dimensional excitation-emission matrixfluorescence spectra showed some specific peaks for humic-like substancesand protein-like substances in all water samples, and the compositions ofDOM in purified water were close to those in raw water. However, therewas a peak of protein-like substances in purified and returned water, whichwas not observed for raw water. The fluorescence intensities of humic-likesubstances in purified water decreased downstream of the plant, while thefluorescence intensities of protein-like substances increased in the pipes. The measured molecular weight distributions of DOM in water presentedsome specific peaks, and DOM with a smaller molecular weight was noteasily removed by water treatment processes. There were positiverelationships between decreases in the intensities of some peaks andresidual chlorine decay.
© The Authors, published by EDP Sciences, 2019
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