Advanced Oxidation Processes to Reduce Odor Emissions from Municipal Wastewater—Comprehensive Studies and Technological Concepts
Municipal facilities can generate odors caused by substances such as fatty acids, organosulfur compounds, aldehydes, and inorganic gases, especially H<sub>2</sub>S. Identifying an effective and cost-efficient solution to the problem is a priority for communities in areas at risk of expos...
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MDPI AG
2022-10-01
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| Series: | Atmosphere |
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| Online Access: | https://www.mdpi.com/2073-4433/13/10/1724 |
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| author | Marcin Dębowski Joanna Kazimierowicz Marcin Zieliński |
| author_facet | Marcin Dębowski Joanna Kazimierowicz Marcin Zieliński |
| author_sort | Marcin Dębowski |
| collection | DOAJ |
| description | Municipal facilities can generate odors caused by substances such as fatty acids, organosulfur compounds, aldehydes, and inorganic gases, especially H<sub>2</sub>S. Identifying an effective and cost-efficient solution to the problem is a priority for communities in areas at risk of exposure to odors. The aim of this study was to evaluate the effect of advanced oxidation processes (AOPs) involving Fenton’s reagents (Fe<sup>2+</sup>/H<sub>2</sub>O<sub>2</sub>, Fe<sup>3+</sup>/H<sub>2</sub>O<sub>2</sub>) on wastewater profiles and their capacity to reduce putrescibility, H<sub>2</sub>S emissions, and odor concentration in the air. The Fe<sup>2+</sup>/H<sub>2</sub>O<sub>2</sub> system proved to be the most efficient in terms of inhibiting the process of redox conditions development, removing organic matter in the wastewater, inhibiting H<sub>2</sub>S formation, and reducing odor emissions. H<sub>2</sub>S generation in raw wastewater was triggered as early as on day 2 of anaerobic retention, with levels of 5.6 ppm to 64 ppm. After introduction of 0.1 g Fe<sup>2+</sup>/dm<sup>3</sup> and 2.0 g H<sub>2</sub>O<sub>2</sub>/dm<sup>3</sup>, no H<sub>2</sub>S was detected in the gas for 8 days. The odor concentration (OC) of raw wastewater (2980 ± 110 ou<sub>e</sub>/m<sup>3</sup>) was reduced by 96.3 ± 1.9% to a level of 100 ± 15 ou<sub>e</sub>/m<sup>3</sup>. The Fe<sup>2+</sup>/H<sub>2</sub>O<sub>2</sub> system maintained its oxidizing capacity up until day 7, with OC reduction by 96.0 ± 0.8% to a level of 120 ± 10 ou<sub>e</sub>/m<sup>3</sup>. On day 10, the OC showed a marked increase to a level 1310 ± 140 ou<sub>e</sub>/m<sup>3</sup>. The conducted research has proven that Fenton-based AOP systems are a technologically and commercially viable method of deodorization of sewage facilities. |
| first_indexed | 2024-03-09T20:44:18Z |
| format | Article |
| id | doaj.art-f9ca56ab98b049e69d2dbd23f0060424 |
| institution | Directory Open Access Journal |
| issn | 2073-4433 |
| language | English |
| last_indexed | 2024-03-09T20:44:18Z |
| publishDate | 2022-10-01 |
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| spelling | doaj.art-f9ca56ab98b049e69d2dbd23f00604242023-11-23T22:52:46ZengMDPI AGAtmosphere2073-44332022-10-011310172410.3390/atmos13101724Advanced Oxidation Processes to Reduce Odor Emissions from Municipal Wastewater—Comprehensive Studies and Technological ConceptsMarcin Dębowski0Joanna Kazimierowicz1Marcin Zieliński2Department of Environmental Engineering, Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, 10-720 Olsztyn, PolandDepartment of Water Supply and Sewage Systems, Faculty of Civil Engineering and Environmental Sciences, Bialystok University of Technology, 15-351 Bialystok, PolandDepartment of Environmental Engineering, Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, 10-720 Olsztyn, PolandMunicipal facilities can generate odors caused by substances such as fatty acids, organosulfur compounds, aldehydes, and inorganic gases, especially H<sub>2</sub>S. Identifying an effective and cost-efficient solution to the problem is a priority for communities in areas at risk of exposure to odors. The aim of this study was to evaluate the effect of advanced oxidation processes (AOPs) involving Fenton’s reagents (Fe<sup>2+</sup>/H<sub>2</sub>O<sub>2</sub>, Fe<sup>3+</sup>/H<sub>2</sub>O<sub>2</sub>) on wastewater profiles and their capacity to reduce putrescibility, H<sub>2</sub>S emissions, and odor concentration in the air. The Fe<sup>2+</sup>/H<sub>2</sub>O<sub>2</sub> system proved to be the most efficient in terms of inhibiting the process of redox conditions development, removing organic matter in the wastewater, inhibiting H<sub>2</sub>S formation, and reducing odor emissions. H<sub>2</sub>S generation in raw wastewater was triggered as early as on day 2 of anaerobic retention, with levels of 5.6 ppm to 64 ppm. After introduction of 0.1 g Fe<sup>2+</sup>/dm<sup>3</sup> and 2.0 g H<sub>2</sub>O<sub>2</sub>/dm<sup>3</sup>, no H<sub>2</sub>S was detected in the gas for 8 days. The odor concentration (OC) of raw wastewater (2980 ± 110 ou<sub>e</sub>/m<sup>3</sup>) was reduced by 96.3 ± 1.9% to a level of 100 ± 15 ou<sub>e</sub>/m<sup>3</sup>. The Fe<sup>2+</sup>/H<sub>2</sub>O<sub>2</sub> system maintained its oxidizing capacity up until day 7, with OC reduction by 96.0 ± 0.8% to a level of 120 ± 10 ou<sub>e</sub>/m<sup>3</sup>. On day 10, the OC showed a marked increase to a level 1310 ± 140 ou<sub>e</sub>/m<sup>3</sup>. The conducted research has proven that Fenton-based AOP systems are a technologically and commercially viable method of deodorization of sewage facilities.https://www.mdpi.com/2073-4433/13/10/1724municipal wastewaterputrefactionodor emissionadvanced oxidation processes (AOPs)Fenton’s reactionhydrogen sulfide |
| spellingShingle | Marcin Dębowski Joanna Kazimierowicz Marcin Zieliński Advanced Oxidation Processes to Reduce Odor Emissions from Municipal Wastewater—Comprehensive Studies and Technological Concepts Atmosphere municipal wastewater putrefaction odor emission advanced oxidation processes (AOPs) Fenton’s reaction hydrogen sulfide |
| title | Advanced Oxidation Processes to Reduce Odor Emissions from Municipal Wastewater—Comprehensive Studies and Technological Concepts |
| title_full | Advanced Oxidation Processes to Reduce Odor Emissions from Municipal Wastewater—Comprehensive Studies and Technological Concepts |
| title_fullStr | Advanced Oxidation Processes to Reduce Odor Emissions from Municipal Wastewater—Comprehensive Studies and Technological Concepts |
| title_full_unstemmed | Advanced Oxidation Processes to Reduce Odor Emissions from Municipal Wastewater—Comprehensive Studies and Technological Concepts |
| title_short | Advanced Oxidation Processes to Reduce Odor Emissions from Municipal Wastewater—Comprehensive Studies and Technological Concepts |
| title_sort | advanced oxidation processes to reduce odor emissions from municipal wastewater comprehensive studies and technological concepts |
| topic | municipal wastewater putrefaction odor emission advanced oxidation processes (AOPs) Fenton’s reaction hydrogen sulfide |
| url | https://www.mdpi.com/2073-4433/13/10/1724 |
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