{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,19]],"date-time":"2026-06-19T17:33:01Z","timestamp":1781890381498,"version":"3.54.5"},"reference-count":32,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2012,4,26]],"date-time":"2012-04-26T00:00:00Z","timestamp":1335398400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Slurry can be oxidized to eliminate undesirable emissions, including malodorous hydrogen sulfide (H2S). However, it is difficult to assess the optimal amount of oxidizing agent required. In this study, one cow and one pig manure, each in three particle size ranges were oxidized with 0\u2013350 mg ozone\/L manure. Redox and H2S concentration were measured continuously. During ozonation the manures gave equivalent redox potential curves. A relatively rapid rise in redox potential was observed within a range of \u2212275 mV to \u221210 mV, with all manures changing as a minimum from \u2212200 mV to \u221280 mV. The gaseous H2S emissions were decreased by 99.5% during the redox increase (\u2212200 mV to \u221280 mV). This is attributed to H2S oxidation by ozone and oxygen, and is not due to H2S deprotonation or gas flushing. By identifying the initiation of the final redox level following the rise, the amount of ozone required to remove H2S from the manure samples was estimated to be in the range of 6\u201324 mg O3\/L manure, depending on the type of manure. Hence, continuous monitoring of redox potential (termination of the redox rise) during the oxidation treatment is a simple method of achieving cost-effective minimization of H2S emissions from slurry.<\/jats:p>","DOI":"10.3390\/s120505349","type":"journal-article","created":{"date-parts":[[2012,4,26]],"date-time":"2012-04-26T11:04:10Z","timestamp":1335438250000},"page":"5349-5362","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":16,"title":["Redox Potential as a Means to Control the Treatment of Slurry to Lower H2S Emissions"],"prefix":"10.3390","volume":"12","author":[{"given":"Maibritt","family":"Hjorth","sequence":"first","affiliation":[{"name":"Faculty of Science and Technology, Department of Engineering, Aarhus University, Research Centre Foulum, Blichers All\u00e9 20, 8830 Tjele, Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christina \u00d8.","family":"Pedersen","sequence":"additional","affiliation":[{"name":"Faculty of Science and Technology, Department of Engineering, Aarhus University, Research Centre Foulum, Blichers All\u00e9 20, 8830 Tjele, Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anders","family":"Feilberg","sequence":"additional","affiliation":[{"name":"Faculty of Science and Technology, Department of Engineering, Aarhus University, Research Centre Foulum, Blichers All\u00e9 20, 8830 Tjele, Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2012,4,26]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"317","DOI":"10.1006\/jaer.1998.0378","article-title":"The use of ozone to reduce the concentration of malodorous metabolites in swine manure slurry","volume":"72","author":"Wu","year":"1999","journal-title":"J. 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