Removal of natural organic matter in full-scale conventional and advanced water treatment plants: Assimilable organic carbon and its precursors

This study aimed to investigate the performance of three full-scale long-time water treatment plants with influent from Taihu Lake for the removal of natural organic matter (NOM) and assimilable organic carbon (AOC), emphasizing on the processes of pre- and post-ozonation and biological activated ca...

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Autores principales:	Huan He, Tian Li, Chang He, Jiapei Chen, Huaqiang Chu, Bingzhi Dong
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Natural organic matter Assimilable organic carbon Advanced water treatment Biological activated carbon Ozonation Chemical engineering TP155-156
Acceso en línea:	https://doaj.org/article/251b62f9b2ea4b839f24ef34cfe609fe
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spelling	oai:doaj.org-article:251b62f9b2ea4b839f24ef34cfe609fe2021-11-18T04:53:20ZRemoval of natural organic matter in full-scale conventional and advanced water treatment plants: Assimilable organic carbon and its precursors2666-821110.1016/j.ceja.2021.100183https://doaj.org/article/251b62f9b2ea4b839f24ef34cfe609fe2021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2666821121000983https://doaj.org/toc/2666-8211This study aimed to investigate the performance of three full-scale long-time water treatment plants with influent from Taihu Lake for the removal of natural organic matter (NOM) and assimilable organic carbon (AOC), emphasizing on the processes of pre- and post-ozonation and biological activated carbon filtration (BACF). High-performance size exclusion chromatography (HPSEC) separation, hydrophilicity/hydrophobicity resin fractionation and excitation-emission matrix (EEM) fluorescence spectroscopy were applied to determine NOM fraction variation in purification processes and their relationships with AOC. The results indicated that NOM fractions with high hydrophilicity (NHPI) and lower molecular weight (1 kDa - 10 kDa) likely contributed to the majority of AOC. The advanced water treatment processes behaved negative removals of AOC since the BACF with long-time operation introduced large amounts of AOC precursors and could cause drastic rebound of AOC upon chlorination disinfection. Finally, during exposure to ozone, the formation rate of AOC showed a linear relationship with UV254 and total fluorescence intensity (TFI) and each regional fluorescence intensity (RFI) with slight interference by the presence of particulate organic matter (POM). This study provides useful information for variation of NOM and its associated bio-availability during conventional and advanced processes in full-scale water treatment plants.Huan HeTian LiChang HeJiapei ChenHuaqiang ChuBingzhi DongElsevierarticleNatural organic matterAssimilable organic carbonAdvanced water treatmentBiological activated carbonOzonationChemical engineeringTP155-156ENChemical Engineering Journal Advances, Vol 8, Iss , Pp 100183- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Natural organic matter Assimilable organic carbon Advanced water treatment Biological activated carbon Ozonation Chemical engineering TP155-156
spellingShingle	Natural organic matter Assimilable organic carbon Advanced water treatment Biological activated carbon Ozonation Chemical engineering TP155-156 Huan He Tian Li Chang He Jiapei Chen Huaqiang Chu Bingzhi Dong Removal of natural organic matter in full-scale conventional and advanced water treatment plants: Assimilable organic carbon and its precursors
description	This study aimed to investigate the performance of three full-scale long-time water treatment plants with influent from Taihu Lake for the removal of natural organic matter (NOM) and assimilable organic carbon (AOC), emphasizing on the processes of pre- and post-ozonation and biological activated carbon filtration (BACF). High-performance size exclusion chromatography (HPSEC) separation, hydrophilicity/hydrophobicity resin fractionation and excitation-emission matrix (EEM) fluorescence spectroscopy were applied to determine NOM fraction variation in purification processes and their relationships with AOC. The results indicated that NOM fractions with high hydrophilicity (NHPI) and lower molecular weight (1 kDa - 10 kDa) likely contributed to the majority of AOC. The advanced water treatment processes behaved negative removals of AOC since the BACF with long-time operation introduced large amounts of AOC precursors and could cause drastic rebound of AOC upon chlorination disinfection. Finally, during exposure to ozone, the formation rate of AOC showed a linear relationship with UV254 and total fluorescence intensity (TFI) and each regional fluorescence intensity (RFI) with slight interference by the presence of particulate organic matter (POM). This study provides useful information for variation of NOM and its associated bio-availability during conventional and advanced processes in full-scale water treatment plants.
format	article
author	Huan He Tian Li Chang He Jiapei Chen Huaqiang Chu Bingzhi Dong
author_facet	Huan He Tian Li Chang He Jiapei Chen Huaqiang Chu Bingzhi Dong
author_sort	Huan He
title	Removal of natural organic matter in full-scale conventional and advanced water treatment plants: Assimilable organic carbon and its precursors
title_short	Removal of natural organic matter in full-scale conventional and advanced water treatment plants: Assimilable organic carbon and its precursors
title_full	Removal of natural organic matter in full-scale conventional and advanced water treatment plants: Assimilable organic carbon and its precursors
title_fullStr	Removal of natural organic matter in full-scale conventional and advanced water treatment plants: Assimilable organic carbon and its precursors
title_full_unstemmed	Removal of natural organic matter in full-scale conventional and advanced water treatment plants: Assimilable organic carbon and its precursors
title_sort	removal of natural organic matter in full-scale conventional and advanced water treatment plants: assimilable organic carbon and its precursors
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/251b62f9b2ea4b839f24ef34cfe609fe
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Removal of natural organic matter in full-scale conventional and advanced water treatment plants: Assimilable organic carbon and its precursors

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