Free sulfurous acid (FSA) inhibition of biological thiosulfate reduction (BTR) in the sulfur cycle-driven wastewater treatment process

Qian, Jin, Wang, Lianlian, Wu, Yaoguo, Bond, Philip L., Zhang, Yuhan, Chang, Xing, Deng, Baixue, Wei, Li, Li, Qin and Wang, Qilin (2017) Free sulfurous acid (FSA) inhibition of biological thiosulfate reduction (BTR) in the sulfur cycle-driven wastewater treatment process. Chemosphere, 176 212-220. doi:10.1016/j.chemosphere.2017.02.117


Author Qian, Jin
Wang, Lianlian
Wu, Yaoguo
Bond, Philip L.
Zhang, Yuhan
Chang, Xing
Deng, Baixue
Wei, Li
Li, Qin
Wang, Qilin
Title Free sulfurous acid (FSA) inhibition of biological thiosulfate reduction (BTR) in the sulfur cycle-driven wastewater treatment process
Journal name Chemosphere   Check publisher's open access policy
ISSN 1879-1298
0045-6535
Publication date 2017-06-01
Sub-type Article (original research)
DOI 10.1016/j.chemosphere.2017.02.117
Open Access Status Not yet assessed
Volume 176
Start page 212
End page 220
Total pages 9
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon Press
Collection year 2018
Language eng
Formatted abstract
A sulfur cycle-based bioprocess for co-treatment of wet flue gas desulfurization (WFGD) wastes with freshwater sewage has been developed. In this process the removal of organic carbon is mainly associated with biological sulfate or sulfite reduction. Thiosulfate is a major intermediate during biological sulfate/sulfite reduction, and its reduction to sulfide is the rate-limiting step. In this study, the impacts of saline sulfite (the ionized form: HSO3 + SO32−) and free sulfurous acid (FSA, the unionized form: H2SO3) sourced from WGFD wastes on the biological thiosulfate reduction (BTR) activities were thoroughly investigated. The BTR activity and sulfate/sulfite-reducing bacteria (SRB) populations in the thiosulfate-reducing up-flow anaerobic sludge bed (UASB) reactor decreased when the FSA was added to the UASB influent. Batch experiment results confirmed that FSA, instead of saline sulfite, was the true inhibitor of BTR. And BTR activities dropped by 50% as the FSA concentrations were increased from 8.0 × 10−8 to 2.0 × 10−4 mg H2SO3-S/L. From an engineering perspective, the findings of this study provide some hints on how to ensure effective thiosulfate accumulation in biological sulfate/sulfite reduction for the subsequent denitrification/denitritation. Such manipulation would result in higher nitrogen removal rates in this co-treatment process of WFGD wastes with municipal sewage.
Keyword Biological thiosulfate reduction (BTR)
Free sulfurous acid (FSA, H2SO3)
Saline sulfite (HSO3 − + SO3 2−)
Sulfate/sulfite-reducing bacteria (SRB)
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
Advanced Water Management Centre Publications
 
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