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Although the gas is formed in the liquid phase, its effects are noticeable when released into the sewer atmosphere. Until recently, the lack of analytical procedures for continuous monitoring of H2S in the liquid phase, as well as its toxicity, have challenged the quantification of the mass transfer coefficient under real conditions. Because of this, most studies have mainly focused on batch experiments with artificial wastewater and\/or oxygen. The aim of this study was to experimentally determine the overall mass transfer coefficient for H2S during intermittent pumping events common in actual sewer systems, using the two-film theory approach and employing online sensors for liquid and gas phase measurements. The mass transfer coefficient was quantified by carrying out 21 experiments with actual wastewater in a 25 m long gravity pipe of a sewer pilot plant located in Berlin (Germany). Results show that the corrected mass transfer coefficient (KLa20) during a pumping event ranged between 0.1 and 8 h\u22121 with a median value of 4.2 h\u22121, within the range of the results obtained by the most common empirical models.<\/jats:p>","DOI":"10.2166\/wst.2022.198","type":"journal-article","created":{"date-parts":[[2022,7,9]],"date-time":"2022-07-09T05:10:40Z","timestamp":1657343440000},"page":"445-456","update-policy":"https:\/\/doi.org\/10.2166\/iwapcrossmarkpolicypage","source":"Crossref","is-referenced-by-count":4,"title":["Experimental determination of the H2S mass transfer coefficient across the liquid\u2013gas interface in gravity sewers"],"prefix":"10.2166","volume":"86","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0908-5974","authenticated-orcid":false,"given":"Micaela","family":"Pacheco Fern\u00e1ndez","sequence":"first","affiliation":[{"name":"Department of Urban Water Management, Technical University of Berlin, Gustav-Meyer-Allee 25, 13355 Berlin, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Matthias","family":"Barjenbruch","sequence":"additional","affiliation":[{"name":"Department of Urban Water Management, Technical University of Berlin, Gustav-Meyer-Allee 25, 13355 Berlin, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"945","published-online":{"date-parts":[[2022,7,8]]},"reference":[{"key":"key-10.2166\/wst.2022.198-1","doi-asserted-by":"publisher","DOI":"10.1061\/JSEDAI.0000976"},{"key":"key-10.2166\/wst.2022.198-2","first-page":"15","volume-title":"Sulfide Emissions in Sewer Networks: Empirical and Numerical Modelling","author":"Carrera","year":"2016"},{"key":"key-10.2166\/wst.2022.198-3","doi-asserted-by":"publisher","DOI":"10.2166\/wst.2017.001"},{"key":"key-10.2166\/wst.2022.198-4","doi-asserted-by":"publisher","DOI":"10.2166\/wst.2017.070"},{"key":"key-10.2166\/wst.2022.198-5","doi-asserted-by":"publisher","DOI":"10.3390\/w13131876"},{"key":"key-10.2166\/wst.2022.198-6","doi-asserted-by":"publisher","DOI":"10.1039\/jr9590000127"},{"key":"key-10.2166\/wst.2022.198-7","doi-asserted-by":"publisher","DOI":"10.1039\/jr9590000127"},{"key":"key-10.2166\/wst.2022.198-8","doi-asserted-by":"crossref","DOI":"10.1201\/9781420012668","volume-title":"Sewer Processes: Microbial and Chemical Process Engineering of Sewer Networks","author":"Hvitved-Jacobsen","year":"2001"},{"key":"key-10.2166\/wst.2022.198-9","doi-asserted-by":"publisher","DOI":"10.1061\/JSEDAI.0000374"},{"key":"key-10.2166\/wst.2022.198-10","doi-asserted-by":"publisher","DOI":"10.1021\/ie50180a002"},{"key":"key-10.2166\/wst.2022.198-11","doi-asserted-by":"publisher","DOI":"10.1038\/247181a0"},{"key":"key-10.2166\/wst.2022.198-12","doi-asserted-by":"publisher","DOI":"10.2175\/106143017X15131012152816"},{"key":"key-10.2166\/wst.2022.198-13","doi-asserted-by":"publisher","DOI":"10.2166\/wst.2017.040"},{"key":"key-10.2166\/wst.2022.198-14","doi-asserted-by":"publisher","DOI":"10.1007\/s11356-018-3856-3"},{"key":"key-10.2166\/wst.2022.198-15","first-page":"469","article-title":"Some reaeration studies in streams","volume":"8","author":"Owens","year":"1964","journal-title":"International Journal of Air Pollution"},{"key":"key-10.2166\/wst.2022.198-16","doi-asserted-by":"crossref","DOI":"10.2166\/wst.2020.398","article-title":"Multi-parameter calibration of a UV\/Vis spectrometer for online monitoring of sewer systems","author":"Pacheco Fern\u00e1ndez","year":"2020","journal-title":"Water Science and Technology"},{"key":"key-10.2166\/wst.2022.198-17","doi-asserted-by":"publisher","DOI":"10.1061\/JSEDAI.0001366"},{"key":"key-10.2166\/wst.2022.198-18","doi-asserted-by":"publisher","DOI":"10.5194\/acp-15-4399-2015"},{"key":"key-10.2166\/wst.2022.198-19","doi-asserted-by":"publisher","DOI":"10.1016\/j.watres.2008.02.013"},{"key":"key-10.2166\/wst.2022.198-20","first-page":"403","article-title":"Influence of pressure main pumping frequency on sulfide formation rates in sanitary sewers","volume":"4","author":"Shypanski","year":"2018","journal-title":"Environmental Science: Water Research & Technology"},{"key":"key-10.2166\/wst.2022.198-21","unstructured":"Sigg L. & Stumm W. 2016 Aquatische Chemie: Einf\u00fchrung in die Chemie nat\u00fcrlicher Gew\u00e4sser (Aquatic Chemistry: Introduction to the Chemistry of Natural Waters).; 6. Auflage.; vdf Hochschulverlag: Z\u00fcrich, Switzerland. p. 64, ISBN 978-3-7281-3767-8."},{"key":"key-10.2166\/wst.2022.198-22","volume-title":"Manual ISA Spectral Analyser","author":"Systemelektronik","year":"2018"},{"key":"key-10.2166\/wst.2022.198-23","first-page":"86","article-title":"Materie\u00f6verf\u00f6ring gas-v\u00e4tska I avloppsledningar (Gas-liquid mass transfer in sewers)","volume":"3","author":"Taghizadeh-Nasser","year":"1986","journal-title":"Chalmers Teckniska H\u00f6gskola"},{"key":"key-10.2166\/wst.2022.198-24","doi-asserted-by":"publisher","DOI":"10.2166\/wst.2019.193"},{"key":"key-10.2166\/wst.2022.198-25","unstructured":"U.S. Environmental Protection Agency 1985 Odor and Corrosion Control in Sanitary Sewerage Systems and Treatment Plants. 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