Nitrate removal by a sulfur-based autotrophic process: Insights into performance, kinetics behavior and community
Nitrate pollution in water and wastewater has become a significant environmental concern. Presently, thorough research was needed on the sulfur autotrophic denitrification (SADN) process for the removal of nitrate (NO3--N) from wastewater characterized by a deficiency in the carbon-to-nitrogen (C/N)...
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| Language: | English |
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Elsevier
2024-01-01
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| Series: | Desalination and Water Treatment |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1944398624002273 |
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| author | Che-We Chang Iva Yenis Septiariva Jenting Chang Shun-Hsing Chuang |
| author_facet | Che-We Chang Iva Yenis Septiariva Jenting Chang Shun-Hsing Chuang |
| author_sort | Che-We Chang |
| collection | DOAJ |
| description | Nitrate pollution in water and wastewater has become a significant environmental concern. Presently, thorough research was needed on the sulfur autotrophic denitrification (SADN) process for the removal of nitrate (NO3--N) from wastewater characterized by a deficiency in the carbon-to-nitrogen (C/N) ratio. Therefore, this study utilized thiosulfate as an electron donor, to investigate nitrate removal in a sulfur-based autotrophic reactor performance, community, and kinetics behavior. The findings demonstrated that a molar ratio of sulfur-to-nitrogen (S/N) of 2.19 provided enough electron donors to complete denitrification. However, nitrate was selectively reduced, accumulating nitrite in the S/N molar ratio of 1.88. Furthermore, the maximum specific nitrate reduction rate (SNaRR) was 14.50 mg NO3--N/g VSS.hr at pH 7 was optimal for denitrification. Denitrification efficiency was limited at pH < 6 or > 8, with SNaRR values of 1.66 and 2.8 mg NO3--N/g VSS.hr at pH 5 and 9, respectively. Moreover, the highest denitrification rate was achieved under anoxic conditions with dissolved oxygen (DO) was 0 mg/L. The denitrification effect was severely inhibited under microaerobic (DO = 1 mg/L) and aerobic (DO = 3 mg/L) conditions. Also, the accumulation of nitrite served as an appropriate indicator of the sulfur autotrophic denitrification (SADN). |
| format | Article |
| id | doaj-art-bf0926efb56d456eacefa07ae3a388a5 |
| institution | OA Journals |
| issn | 1944-3986 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Desalination and Water Treatment |
| spelling | doaj-art-bf0926efb56d456eacefa07ae3a388a52025-08-20T02:17:28ZengElsevierDesalination and Water Treatment1944-39862024-01-0131710019910.1016/j.dwt.2024.100199Nitrate removal by a sulfur-based autotrophic process: Insights into performance, kinetics behavior and communityChe-We Chang0Iva Yenis Septiariva1Jenting Chang2Shun-Hsing Chuang3Graduate Institute of Environmental Engineering, National Central University, Taoyuan City 32001, TaiwanGraduate Institute of Environmental Engineering, National Central University, Taoyuan City 32001, Taiwan; Civil Engineering Study Program, Universitas Sebelas Maret, Surakarta 57126, IndonesiaGraduate Institute of Environmental Engineering, National Central University, Taoyuan City 32001, TaiwanGraduate Institute of Environmental Engineering, National Central University, Taoyuan City 32001, Taiwan; Corresponding author.Nitrate pollution in water and wastewater has become a significant environmental concern. Presently, thorough research was needed on the sulfur autotrophic denitrification (SADN) process for the removal of nitrate (NO3--N) from wastewater characterized by a deficiency in the carbon-to-nitrogen (C/N) ratio. Therefore, this study utilized thiosulfate as an electron donor, to investigate nitrate removal in a sulfur-based autotrophic reactor performance, community, and kinetics behavior. The findings demonstrated that a molar ratio of sulfur-to-nitrogen (S/N) of 2.19 provided enough electron donors to complete denitrification. However, nitrate was selectively reduced, accumulating nitrite in the S/N molar ratio of 1.88. Furthermore, the maximum specific nitrate reduction rate (SNaRR) was 14.50 mg NO3--N/g VSS.hr at pH 7 was optimal for denitrification. Denitrification efficiency was limited at pH < 6 or > 8, with SNaRR values of 1.66 and 2.8 mg NO3--N/g VSS.hr at pH 5 and 9, respectively. Moreover, the highest denitrification rate was achieved under anoxic conditions with dissolved oxygen (DO) was 0 mg/L. The denitrification effect was severely inhibited under microaerobic (DO = 1 mg/L) and aerobic (DO = 3 mg/L) conditions. Also, the accumulation of nitrite served as an appropriate indicator of the sulfur autotrophic denitrification (SADN).http://www.sciencedirect.com/science/article/pii/S1944398624002273Autotrophic denitrificationDissolved oxygenSpecific denitrification rateS/N molar ratiopH |
| spellingShingle | Che-We Chang Iva Yenis Septiariva Jenting Chang Shun-Hsing Chuang Nitrate removal by a sulfur-based autotrophic process: Insights into performance, kinetics behavior and community Desalination and Water Treatment Autotrophic denitrification Dissolved oxygen Specific denitrification rate S/N molar ratio pH |
| title | Nitrate removal by a sulfur-based autotrophic process: Insights into performance, kinetics behavior and community |
| title_full | Nitrate removal by a sulfur-based autotrophic process: Insights into performance, kinetics behavior and community |
| title_fullStr | Nitrate removal by a sulfur-based autotrophic process: Insights into performance, kinetics behavior and community |
| title_full_unstemmed | Nitrate removal by a sulfur-based autotrophic process: Insights into performance, kinetics behavior and community |
| title_short | Nitrate removal by a sulfur-based autotrophic process: Insights into performance, kinetics behavior and community |
| title_sort | nitrate removal by a sulfur based autotrophic process insights into performance kinetics behavior and community |
| topic | Autotrophic denitrification Dissolved oxygen Specific denitrification rate S/N molar ratio pH |
| url | http://www.sciencedirect.com/science/article/pii/S1944398624002273 |
| work_keys_str_mv | AT chewechang nitrateremovalbyasulfurbasedautotrophicprocessinsightsintoperformancekineticsbehaviorandcommunity AT ivayenisseptiariva nitrateremovalbyasulfurbasedautotrophicprocessinsightsintoperformancekineticsbehaviorandcommunity AT jentingchang nitrateremovalbyasulfurbasedautotrophicprocessinsightsintoperformancekineticsbehaviorandcommunity AT shunhsingchuang nitrateremovalbyasulfurbasedautotrophicprocessinsightsintoperformancekineticsbehaviorandcommunity |