Modelling of hydrogen sulfide fate and emissions in extended aeration sewage treatment plant using TOXCHEM simulations
Abstract Odors due to the emission of hydrogen sulfide (H2S) have been a concern in the sewage treatment plants over the last decades. H2S fate and emissions from extended aeration activated sludge (EAAS) system in Muharram Aisha-sewage treatment plant (MA-STP) were studied using TOXCHEM model. Sens...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2020-12-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-020-79395-8 |
| _version_ | 1818855489165852672 |
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| author | Haider M. Zwain Basim K. Nile Ahmed M. Faris Mohammadtaghi Vakili Irvan Dahlan |
| author_facet | Haider M. Zwain Basim K. Nile Ahmed M. Faris Mohammadtaghi Vakili Irvan Dahlan |
| author_sort | Haider M. Zwain |
| collection | DOAJ |
| description | Abstract Odors due to the emission of hydrogen sulfide (H2S) have been a concern in the sewage treatment plants over the last decades. H2S fate and emissions from extended aeration activated sludge (EAAS) system in Muharram Aisha-sewage treatment plant (MA-STP) were studied using TOXCHEM model. Sensitivity analysis at different aeration flowrate, H2S loading rate, wastewater pH, wastewater temperature and wind speed were studied. The predicted data were validated against actual results, where all the data were validated within the limits, and the statistical evaluation of normalized mean square error (NMSE), geometric variance (VG), and correlation coefficient (R) were close to the ideal fit. The results showed that the major processes occurring in the system were degradation and emission. During summer (27 °C) and winter (12 °C), about 25 and 23%, 1 and 2%, 2 and 2%, and 72 and 73% were fated as emitted to air, discharged with effluent, sorbed to sludge, and biodegraded, respectively. At summer and winter, the total emitted concentrations of H2S were 6.403 and 5.614 ppm, respectively. The sensitivity results indicated that aeration flowrate, H2S loading rate and wastewater pH highly influenced the emission and degradation of H2S processes compared to wastewater temperature and wind speed. To conclude, TOXCHEM model successfully predicted the H2S fate and emissions in EAAS system. |
| first_indexed | 2024-12-19T08:09:25Z |
| format | Article |
| id | doaj.art-c3f8f37d08a64931ad67567080e4a0ad |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-19T08:09:25Z |
| publishDate | 2020-12-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-c3f8f37d08a64931ad67567080e4a0ad2022-12-21T20:29:40ZengNature PortfolioScientific Reports2045-23222020-12-0110111110.1038/s41598-020-79395-8Modelling of hydrogen sulfide fate and emissions in extended aeration sewage treatment plant using TOXCHEM simulationsHaider M. Zwain0Basim K. Nile1Ahmed M. Faris2Mohammadtaghi Vakili3Irvan Dahlan4College of Water Resources Engineering, Al-Qasim Green UniversityCollege of Engineering, University of KerbalaSchool of Civil Engineering, Iran University of Science and TechnologyGreen Intelligence Environmental School, Yangtze Normal UniversitySchool of Chemical Engineering, Universiti Sains Malaysia, Engineering CampusAbstract Odors due to the emission of hydrogen sulfide (H2S) have been a concern in the sewage treatment plants over the last decades. H2S fate and emissions from extended aeration activated sludge (EAAS) system in Muharram Aisha-sewage treatment plant (MA-STP) were studied using TOXCHEM model. Sensitivity analysis at different aeration flowrate, H2S loading rate, wastewater pH, wastewater temperature and wind speed were studied. The predicted data were validated against actual results, where all the data were validated within the limits, and the statistical evaluation of normalized mean square error (NMSE), geometric variance (VG), and correlation coefficient (R) were close to the ideal fit. The results showed that the major processes occurring in the system were degradation and emission. During summer (27 °C) and winter (12 °C), about 25 and 23%, 1 and 2%, 2 and 2%, and 72 and 73% were fated as emitted to air, discharged with effluent, sorbed to sludge, and biodegraded, respectively. At summer and winter, the total emitted concentrations of H2S were 6.403 and 5.614 ppm, respectively. The sensitivity results indicated that aeration flowrate, H2S loading rate and wastewater pH highly influenced the emission and degradation of H2S processes compared to wastewater temperature and wind speed. To conclude, TOXCHEM model successfully predicted the H2S fate and emissions in EAAS system.https://doi.org/10.1038/s41598-020-79395-8 |
| spellingShingle | Haider M. Zwain Basim K. Nile Ahmed M. Faris Mohammadtaghi Vakili Irvan Dahlan Modelling of hydrogen sulfide fate and emissions in extended aeration sewage treatment plant using TOXCHEM simulations Scientific Reports |
| title | Modelling of hydrogen sulfide fate and emissions in extended aeration sewage treatment plant using TOXCHEM simulations |
| title_full | Modelling of hydrogen sulfide fate and emissions in extended aeration sewage treatment plant using TOXCHEM simulations |
| title_fullStr | Modelling of hydrogen sulfide fate and emissions in extended aeration sewage treatment plant using TOXCHEM simulations |
| title_full_unstemmed | Modelling of hydrogen sulfide fate and emissions in extended aeration sewage treatment plant using TOXCHEM simulations |
| title_short | Modelling of hydrogen sulfide fate and emissions in extended aeration sewage treatment plant using TOXCHEM simulations |
| title_sort | modelling of hydrogen sulfide fate and emissions in extended aeration sewage treatment plant using toxchem simulations |
| url | https://doi.org/10.1038/s41598-020-79395-8 |
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