Waste sludge disintegration, methanogenesis and final disposal via various pretreatments: Comparison of performance and effectiveness

This study compared the three wastewater pretreatments of ozonation, Fe2+-S2O82− and freeze-thawing (F/T) in the disintegration, anaerobic digestion (AD) and final disposal of the sludge. The F/T pretreatment increased the dewaterability and settleability of the sludge by 7.8% and 47.1%, respectivel...

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Autores principales:	Haiyang He, Xiaodong Xin, Wei Qiu, Dong Li, Zhicen Liu, Jun Ma
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Sludge disintegration Anaerobic sludge digestion Effectiveness comparison Different pretreatments Environmental sciences GE1-350 Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/a5141de480a74c6ea1fd6dd679e32d72
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spelling	oai:doaj.org-article:a5141de480a74c6ea1fd6dd679e32d722021-11-10T04:41:49ZWaste sludge disintegration, methanogenesis and final disposal via various pretreatments: Comparison of performance and effectiveness2666-498410.1016/j.ese.2021.100132https://doaj.org/article/a5141de480a74c6ea1fd6dd679e32d722021-10-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2666498421000569https://doaj.org/toc/2666-4984This study compared the three wastewater pretreatments of ozonation, Fe2+-S2O82− and freeze-thawing (F/T) in the disintegration, anaerobic digestion (AD) and final disposal of the sludge. The F/T pretreatment increased the dewaterability and settleability of the sludge by 7.8% and 47.1%, respectively. The ozonation pretreatment formed more volatile fatty acids (VFAs), with a peak value of 320.82 mg SCOD/L and controlled the release of sulfides. The Fe2+-S2O82− pretreatment removed heavy metals through the absorption and flocculation of ferric particles formed in-situ. During the anaerobic digestion of the sludge, the ozonation pretreatment accelerated the hydrolysis rate (k) rather than the biochemical methane potential (B0) of the sludge due to the high VFA content in the supernatant. Comparatively, the F/T pretreatment facilitated the B0 with great economic efficiency by enhancing the solubilisation of the sludge. Although Fe2+-S2O82− pretreatment decreased the methane production, the ferric particle was a unique advantage in the disintegration and harmless disposal of the sludge. The digested sludge had more VFAs after ozonation pretreatment, which contributed to the recycling of carbon. In addition, the lower sludge volume could save the expense of transportation and disposal by ozonation pretreatment. Different pretreatments had different characteristics. The comparative study provided information allowing the selection of the type of pretreatment to achieve different objectives of the treatment and disposal of sludge.Haiyang HeXiaodong XinWei QiuDong LiZhicen LiuJun MaElsevierarticleSludge disintegrationAnaerobic sludge digestionEffectiveness comparisonDifferent pretreatmentsEnvironmental sciencesGE1-350Environmental technology. Sanitary engineeringTD1-1066ENEnvironmental Science and Ecotechnology, Vol 8, Iss , Pp 100132- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Sludge disintegration Anaerobic sludge digestion Effectiveness comparison Different pretreatments Environmental sciences GE1-350 Environmental technology. Sanitary engineering TD1-1066
spellingShingle	Sludge disintegration Anaerobic sludge digestion Effectiveness comparison Different pretreatments Environmental sciences GE1-350 Environmental technology. Sanitary engineering TD1-1066 Haiyang He Xiaodong Xin Wei Qiu Dong Li Zhicen Liu Jun Ma Waste sludge disintegration, methanogenesis and final disposal via various pretreatments: Comparison of performance and effectiveness
description	This study compared the three wastewater pretreatments of ozonation, Fe2+-S2O82− and freeze-thawing (F/T) in the disintegration, anaerobic digestion (AD) and final disposal of the sludge. The F/T pretreatment increased the dewaterability and settleability of the sludge by 7.8% and 47.1%, respectively. The ozonation pretreatment formed more volatile fatty acids (VFAs), with a peak value of 320.82 mg SCOD/L and controlled the release of sulfides. The Fe2+-S2O82− pretreatment removed heavy metals through the absorption and flocculation of ferric particles formed in-situ. During the anaerobic digestion of the sludge, the ozonation pretreatment accelerated the hydrolysis rate (k) rather than the biochemical methane potential (B0) of the sludge due to the high VFA content in the supernatant. Comparatively, the F/T pretreatment facilitated the B0 with great economic efficiency by enhancing the solubilisation of the sludge. Although Fe2+-S2O82− pretreatment decreased the methane production, the ferric particle was a unique advantage in the disintegration and harmless disposal of the sludge. The digested sludge had more VFAs after ozonation pretreatment, which contributed to the recycling of carbon. In addition, the lower sludge volume could save the expense of transportation and disposal by ozonation pretreatment. Different pretreatments had different characteristics. The comparative study provided information allowing the selection of the type of pretreatment to achieve different objectives of the treatment and disposal of sludge.
format	article
author	Haiyang He Xiaodong Xin Wei Qiu Dong Li Zhicen Liu Jun Ma
author_facet	Haiyang He Xiaodong Xin Wei Qiu Dong Li Zhicen Liu Jun Ma
author_sort	Haiyang He
title	Waste sludge disintegration, methanogenesis and final disposal via various pretreatments: Comparison of performance and effectiveness
title_short	Waste sludge disintegration, methanogenesis and final disposal via various pretreatments: Comparison of performance and effectiveness
title_full	Waste sludge disintegration, methanogenesis and final disposal via various pretreatments: Comparison of performance and effectiveness
title_fullStr	Waste sludge disintegration, methanogenesis and final disposal via various pretreatments: Comparison of performance and effectiveness
title_full_unstemmed	Waste sludge disintegration, methanogenesis and final disposal via various pretreatments: Comparison of performance and effectiveness
title_sort	waste sludge disintegration, methanogenesis and final disposal via various pretreatments: comparison of performance and effectiveness
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/a5141de480a74c6ea1fd6dd679e32d72
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Waste sludge disintegration, methanogenesis and final disposal via various pretreatments: Comparison of performance and effectiveness

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