Transfer behavior of odorous pollutants in wastewater sludge system under typical chemical conditioning processes for dewaterability enhancement

Abstract Chemical conditioning has been used for enhancing wastewater sludge dewaterability for many years, but the characteristics of odorous pollutants emission in sludge conditioning were still unclear. In this work, the transfer behavior of different odorous pollutants between air, liquid and so...

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Autores principales:	Hongyu Gao, Weijun Zhang, Zhenzhen Song, Xiaofang Yang, Lian Yang, Mengdi Cao, Dongsheng Wang, Guiying Liao
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/7687bc57997d48f0bb8da10511beaaa0
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spelling	oai:doaj.org-article:7687bc57997d48f0bb8da10511beaaa02021-12-02T15:05:40ZTransfer behavior of odorous pollutants in wastewater sludge system under typical chemical conditioning processes for dewaterability enhancement10.1038/s41598-017-03727-42045-2322https://doaj.org/article/7687bc57997d48f0bb8da10511beaaa02017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-03727-4https://doaj.org/toc/2045-2322Abstract Chemical conditioning has been used for enhancing wastewater sludge dewaterability for many years, but the characteristics of odorous pollutants emission in sludge conditioning were still unclear. In this work, the transfer behavior of different odorous pollutants between air, liquid and solid phases under typical chemical conditioning processes for high-pressure dewatering was systematically investigated. The results indicated that that besides hydrogen sulfide (H2S) and ammonia (NH3), 21 kinds of volatile organic contaminants (VOCs) were identified and quantified by gas chromatography-mass spectrometry (GC-MS), while the concentrations and composition of odorous pollutants varied greatly for different conditioning processes. VOCs were composed by three main constituents including benzenes, halogeno benzene and hydrocarbons. According to mass balance analysis, about 50% of VOCs adsorbed within sludge extracellular polymeric substances (EPS) fraction. Since EPS was damaged and/or flocculation in different chemical conditioning processes, VOCs distributed in solid phase transformed into liquid phase and then released into air. The discrepancies in mass of odorous pollutants before and after chemical conditioning were likely to be related to chemical conversion under acidification, oxidation and precipitation in the presence of ferric ions.Hongyu GaoWeijun ZhangZhenzhen SongXiaofang YangLian YangMengdi CaoDongsheng WangGuiying LiaoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-12 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Hongyu Gao Weijun Zhang Zhenzhen Song Xiaofang Yang Lian Yang Mengdi Cao Dongsheng Wang Guiying Liao Transfer behavior of odorous pollutants in wastewater sludge system under typical chemical conditioning processes for dewaterability enhancement
description	Abstract Chemical conditioning has been used for enhancing wastewater sludge dewaterability for many years, but the characteristics of odorous pollutants emission in sludge conditioning were still unclear. In this work, the transfer behavior of different odorous pollutants between air, liquid and solid phases under typical chemical conditioning processes for high-pressure dewatering was systematically investigated. The results indicated that that besides hydrogen sulfide (H2S) and ammonia (NH3), 21 kinds of volatile organic contaminants (VOCs) were identified and quantified by gas chromatography-mass spectrometry (GC-MS), while the concentrations and composition of odorous pollutants varied greatly for different conditioning processes. VOCs were composed by three main constituents including benzenes, halogeno benzene and hydrocarbons. According to mass balance analysis, about 50% of VOCs adsorbed within sludge extracellular polymeric substances (EPS) fraction. Since EPS was damaged and/or flocculation in different chemical conditioning processes, VOCs distributed in solid phase transformed into liquid phase and then released into air. The discrepancies in mass of odorous pollutants before and after chemical conditioning were likely to be related to chemical conversion under acidification, oxidation and precipitation in the presence of ferric ions.
format	article
author	Hongyu Gao Weijun Zhang Zhenzhen Song Xiaofang Yang Lian Yang Mengdi Cao Dongsheng Wang Guiying Liao
author_facet	Hongyu Gao Weijun Zhang Zhenzhen Song Xiaofang Yang Lian Yang Mengdi Cao Dongsheng Wang Guiying Liao
author_sort	Hongyu Gao
title	Transfer behavior of odorous pollutants in wastewater sludge system under typical chemical conditioning processes for dewaterability enhancement
title_short	Transfer behavior of odorous pollutants in wastewater sludge system under typical chemical conditioning processes for dewaterability enhancement
title_full	Transfer behavior of odorous pollutants in wastewater sludge system under typical chemical conditioning processes for dewaterability enhancement
title_fullStr	Transfer behavior of odorous pollutants in wastewater sludge system under typical chemical conditioning processes for dewaterability enhancement
title_full_unstemmed	Transfer behavior of odorous pollutants in wastewater sludge system under typical chemical conditioning processes for dewaterability enhancement
title_sort	transfer behavior of odorous pollutants in wastewater sludge system under typical chemical conditioning processes for dewaterability enhancement
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/7687bc57997d48f0bb8da10511beaaa0
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_version_	1718388773793824768

Transfer behavior of odorous pollutants in wastewater sludge system under typical chemical conditioning processes for dewaterability enhancement

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