Inducement mechanism and control of self-acidification in elemental sulfur fluidizing bioreactor.

Sun, Y-L; Wang, J-Y; Ngo, HH; Wei, W; Guo, W; Zhang, X-N; Cheng, H-Y; Yang, J-X; Wang, A-J

Inducement mechanism and control of self-acidification in elemental sulfur fluidizing bioreactor.

Sun, Y-L Wang, J-Y Ngo, HH Wei, W Guo, W

Zhang, X-N Cheng, H-Y Yang, J-X Wang, A-J

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Bioresour Technol, 2023, 393, pp. 130081
Issue Date:: 2023-11-20

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Field	Value	Language
dc.contributor.author	Sun, Y-L
dc.contributor.author	Wang, J-Y
dc.contributor.author	Ngo, HH
dc.contributor.author	Wei, W
dc.contributor.author	Guo, W https://orcid.org/0000-0001-5542-2858
dc.contributor.author	Zhang, X-N
dc.contributor.author	Cheng, H-Y
dc.contributor.author	Yang, J-X
dc.contributor.author	Wang, A-J
dc.date.accessioned	2024-01-07T13:05:58Z
dc.date.available	2023-11-18
dc.date.available	2024-01-07T13:05:58Z
dc.date.issued	2023-11-20
dc.identifier.citation	Bioresour Technol, 2023, 393, pp. 130081
dc.identifier.issn	0960-8524
dc.identifier.issn	1873-2976
dc.identifier.uri	http://hdl.handle.net/10453/174066
dc.description.abstract	The sulfur fluidizing bioreactor (S0FB) has significant superiorities in treating nitrate-rich wastewater. However, substantial self-acidification has been observed in engineering applications, resulting in frequent start-up failures. In this study, self-acidification was reproduced in a lab-scale S0FB. It was demonstrated that self-acidification was mainly induced by sulfur disproportionation process, accounting for 93.4 % of proton generation. Supplying sufficient alkalinity to both the influent (3000 mg/L) and the bulk (2000 mg/L) of S0FB was essential for achieving a successful start-up. Furthermore, the S0FB reached 10.3 kg-N/m3/d of nitrogen removal rate and 0.13 kg-PO43-/m3/d of phosphate removal rate, respectively, surpassing those of the documented sulfur packing bioreactors by 7-129 times and 26-65 times. This study offers a feasible and practical method to avoid self-acidification during restart of S0FB and highlights the considerable potential of S0FB in the treatment of nitrate-rich wastewater.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	Elsevier
dc.relation.ispartof	Bioresour Technol
dc.relation.isbasedon	10.1016/j.biortech.2023.130081
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.subject.classification	Biotechnology
dc.subject.classification	3001 Agricultural biotechnology
dc.subject.classification	3106 Industrial biotechnology
dc.subject.classification	3107 Microbiology
dc.title	Inducement mechanism and control of self-acidification in elemental sulfur fluidizing bioreactor.
dc.type	Journal Article
utslib.citation.volume	393
utslib.location.activity	England
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	embargoed	*
utslib.copyright.embargo	2025-11-01T00:00:00+1000Z
dc.date.updated	2024-01-07T13:05:57Z
pubs.publication-status	Published online
pubs.volume	393

Abstract:

The sulfur fluidizing bioreactor (S0FB) has significant superiorities in treating nitrate-rich wastewater. However, substantial self-acidification has been observed in engineering applications, resulting in frequent start-up failures. In this study, self-acidification was reproduced in a lab-scale S0FB. It was demonstrated that self-acidification was mainly induced by sulfur disproportionation process, accounting for 93.4 % of proton generation. Supplying sufficient alkalinity to both the influent (3000 mg/L) and the bulk (2000 mg/L) of S0FB was essential for achieving a successful start-up. Furthermore, the S0FB reached 10.3 kg-N/m3/d of nitrogen removal rate and 0.13 kg-PO43-/m3/d of phosphate removal rate, respectively, surpassing those of the documented sulfur packing bioreactors by 7-129 times and 26-65 times. This study offers a feasible and practical method to avoid self-acidification during restart of S0FB and highlights the considerable potential of S0FB in the treatment of nitrate-rich wastewater.

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http://hdl.handle.net/10453/174066