Field Study of Generation and Emission of Hydrogen Sulfide in a Sanitary Sewer Network Downstream of a Long Forcemain
Publication: Journal of Environmental Engineering
Volume 150, Issue 11
Abstract
Fieldwork was carried out in the western area of Edmonton, Alberta, Canada to assess the contribution of a long force main and to investigate the source of generation in a complex sewer network. The study sewer trunk has a length of 10 km, a diameter of up to 1.95 m, and flow rate of up to . In the upstream, there is a 5.6 km forcemain, and the pump station operation can cause a sudden increase of in the sewer air of the discharge manholes to reach 500 ppm. Wastewater samples were collected in 14 manholes in the sewer network and analyzed for sulfide and other relevant parameters. The maximum values of sulfide were and pH remained mostly neutral. For predicting the sulfide generation rate, an empirical model was applied with readily biodegradable organic matter. Then the emission of in gravity pipes was investigated, and it was found over 90% of stayed in the liquid phase when wastewater flowed in gravity sewer pipes. Finally, the mass transfer in a drop structure of 8 m was investigated. The liquid phase concentration in the upstream was 2.6 times that of the downstream, and about 62% of the was released in this drop structure indicating the significant emission of in drop structures.
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Data Availability Statement
All data, models, or code generated or used during the study are available from the corresponding author by request (field measurements).
Acknowledgments
The authors would like to express the appreciation for the financial support of EPCOR Utilities and the Natural Sciences and Engineering Research Council (NSERC) of Canada. The authors also would like to thank Perry Fedun for his technical assistance.
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Information
Published In
Journal of Environmental Engineering
Volume 150 • Issue 11 • November 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Jan 8, 2024
Accepted: Jun 4, 2024
Published online: Aug 30, 2024
Published in print: Nov 1, 2024
Discussion open until: Jan 30, 2025
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