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Development of cost-effective and long-lasting integrated technology for H2S control from sludge in wastewater treatment plants
Hao, Tianwei1; Zeng, Jiajia2; Pan, Jianyu2; Huang, Wenzhuo2; Kong, Zhe3; Sun, Jianliang2
2023-02-01
Source PublicationEnvironmental Science-Water Research & Technology
ISSN2053-1400
Volume9Issue:2Pages:433-441
Abstract

Hydrogen sulfide (HS) production and emissions from sulfate-reducing bacteria (SRB) during wastewater and sludge (primary sludge and excess activated sludge) treatment and disposal are major concerns due to odor nuisance, corrosion, and health risks associated with HS. The widely used chemical dosing approach requires high amounts of chemicals, resulting in high treatment costs. To develop cost-effective and long-lasting technologies for the HS control from the sludge, this study proposed integrated methods, including oxidant-glutaraldehyde dosing, aeration-oxidant dosing, and oxidant-iron oxide (FeO) dosing. Two oxidants (hydrogen peroxide and sodium chlorite) and one biocide (glutaraldehyde) were selected. All the integrated methods yielded good performances in the HS control, from the sludge, due to the synergistic pathways involved, namely, sulfide oxidation by oxidants and FeO, and the inhibition of the SRB activity by glutaraldehyde. The optimal removal efficiencies of HS in the gas phase and dissolved sulfide in the sludge phase were up to 99.8% and 99%, respectively, within 4 h. Moreover, the integration of oxidants with glutaraldehyde and FeO decreased the hydrogen sulfide release by 66-93%, in prolonged periods of 24-48 h. The integrated oxidant-glutaraldehyde dosing and aeration-oxidant dosing, with treatment costs between 0.5-1.57 USD per m sludge, were more cost-effective than the integrated dosing of FeO (12.22-13.68 USD per m sludge), as well as the case of dosing a single oxidant (0.53-2.35 USD per m sludge). The findings demonstrated that the integrated oxidant-glutaraldehyde and aeration-oxidant dosing could be cost-effective and long-lasting alternatives to the conventional chemical dosings for HS control from sludge, oil wells, and reservoirs. This shows the potential industrial application of this work.

DOI10.1039/d2ew00496h
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaEngineering ; Environmental Sciences & Ecology ; Water Resources
WOS SubjectEngineering, Environmental ; Environmental Sciences ; Water Resources
WOS IDWOS:000896682000001
PublisherRoyal Society of Chemistry
Scopus ID2-s2.0-85144795052
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Citation statistics
Document TypeJournal article
CollectionFaculty of Science and Technology
DEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING
Corresponding AuthorSun, Jianliang
Affiliation1.Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Macau 999078, China
2.Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety, & MOE Key Laboratory of Theoretical Chemistry of Environment, School of Environment, South China Normal University, Guangzhou, 510006, China
3.School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China
First Author AffilicationFaculty of Science and Technology
Recommended Citation
GB/T 7714
Hao, Tianwei,Zeng, Jiajia,Pan, Jianyu,et al. Development of cost-effective and long-lasting integrated technology for H2S control from sludge in wastewater treatment plants[J]. Environmental Science-Water Research & Technology, 2023, 9(2), 433-441.
APA Hao, Tianwei., Zeng, Jiajia., Pan, Jianyu., Huang, Wenzhuo., Kong, Zhe., & Sun, Jianliang (2023). Development of cost-effective and long-lasting integrated technology for H2S control from sludge in wastewater treatment plants. Environmental Science-Water Research & Technology, 9(2), 433-441.
MLA Hao, Tianwei,et al."Development of cost-effective and long-lasting integrated technology for H2S control from sludge in wastewater treatment plants".Environmental Science-Water Research & Technology 9.2(2023):433-441.
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