The role of the combined nitrogen-sulfur-carbon cycles for efficient performance of anammox-based systems
Copyright © 2024. Published by Elsevier B.V..
The combined anammox/mixotrophic denitrification process was conducted in two granular sequencing batch reactors (SBRs) during a 200-day operation. Both reactors were fed with synthetic medium, but SBR2 was enriched with additional sulfate (SO42-) which influenced sulfate reduction ammonium oxidation (SRAO) and heterotrophic reduction of SO42- by sulfate reducing bacteria. It was hypothesized that the addition of SO42- could positively impact the removal rates of N-S-C compounds. A low C/N ratio (0.4-1.6) was maintained to prevent inhibition of anaerobic ammonium oxidizing bacteria (AnAOB), and alternating chemical oxygen demand (COD) on/off conditions were used to regenerate AnAOB during COD-off phases and heterotrophic denitrifiers during COD-on phases. Stoichiometric analysis showed that introducing SO42- in SBR2 enhanced the ammonium utilization rate, which was approximately 10 % higher compared to SBR1 in the final stage of the experiment (25.8 vs. 22.8 mg N/(g VSS·h)). The total nitrogen removal efficiencies ranged from 62 % to 99 % in both reactors, with SBR2 consistently exhibiting approximately 4 % higher efficiency than SBR1. In SBR2, the maximum overall SO42- utilization efficiency reached 27 % under COD-off conditions, while overall COD utilization was almost complete under COD-on conditions. A strong correlation (R2 = 0.98) was observed between SO42- production and COD utilization. The key players responsible for N and S transformations in response to SO42- addition were Candidatus Brocadia and Chloroflexi - Anaerolineae. This study highlights the potential to enhance the overall efficiency of N-S-C removal by implementing an integrated anammox/mixotrophic denitrification process. The combination of cycles emerges as a sustainable approach for treating wastewater rich in N-S-C compounds.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:917 |
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| Enthalten in: |
The Science of the total environment - 917(2024) vom: 20. Feb., Seite 170477 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Derwis, Dominika [VerfasserIn] |
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| Links: |
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| Anmerkungen: |
Date Completed 22.02.2024 Date Revised 22.02.2024 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1016/j.scitotenv.2024.170477 |
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| 100 | 1 | |a Derwis, Dominika |e verfasserin |4 aut | |
| 245 | 1 | 4 | |a The role of the combined nitrogen-sulfur-carbon cycles for efficient performance of anammox-based systems |
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| 520 | |a Copyright © 2024. Published by Elsevier B.V. | ||
| 520 | |a The combined anammox/mixotrophic denitrification process was conducted in two granular sequencing batch reactors (SBRs) during a 200-day operation. Both reactors were fed with synthetic medium, but SBR2 was enriched with additional sulfate (SO42-) which influenced sulfate reduction ammonium oxidation (SRAO) and heterotrophic reduction of SO42- by sulfate reducing bacteria. It was hypothesized that the addition of SO42- could positively impact the removal rates of N-S-C compounds. A low C/N ratio (0.4-1.6) was maintained to prevent inhibition of anaerobic ammonium oxidizing bacteria (AnAOB), and alternating chemical oxygen demand (COD) on/off conditions were used to regenerate AnAOB during COD-off phases and heterotrophic denitrifiers during COD-on phases. Stoichiometric analysis showed that introducing SO42- in SBR2 enhanced the ammonium utilization rate, which was approximately 10 % higher compared to SBR1 in the final stage of the experiment (25.8 vs. 22.8 mg N/(g VSS·h)). The total nitrogen removal efficiencies ranged from 62 % to 99 % in both reactors, with SBR2 consistently exhibiting approximately 4 % higher efficiency than SBR1. In SBR2, the maximum overall SO42- utilization efficiency reached 27 % under COD-off conditions, while overall COD utilization was almost complete under COD-on conditions. A strong correlation (R2 = 0.98) was observed between SO42- production and COD utilization. The key players responsible for N and S transformations in response to SO42- addition were Candidatus Brocadia and Chloroflexi - Anaerolineae. This study highlights the potential to enhance the overall efficiency of N-S-C removal by implementing an integrated anammox/mixotrophic denitrification process. The combination of cycles emerges as a sustainable approach for treating wastewater rich in N-S-C compounds | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Anammox | |
| 650 | 4 | |a Microbial interaction | |
| 650 | 4 | |a Mixotrophic denitrification | |
| 650 | 4 | |a Nitrogen removal performance | |
| 650 | 4 | |a Sulfur-dependent autotrophic denitrification | |
| 650 | 7 | |a Nitrogen |2 NLM | |
| 650 | 7 | |a N762921K75 |2 NLM | |
| 650 | 7 | |a Ammonium Compounds |2 NLM | |
| 650 | 7 | |a Sulfates |2 NLM | |
| 650 | 7 | |a Sulfur |2 NLM | |
| 650 | 7 | |a 70FD1KFU70 |2 NLM | |
| 650 | 7 | |a Sewage |2 NLM | |
| 700 | 1 | |a Al-Hazmi, Hussein E |e verfasserin |4 aut | |
| 700 | 1 | |a Majtacz, Joanna |e verfasserin |4 aut | |
| 700 | 1 | |a Kowal, Przemysław |e verfasserin |4 aut | |
| 700 | 1 | |a Ciesielski, Sławomir |e verfasserin |4 aut | |
| 700 | 1 | |a Mąkinia, Jacek |e verfasserin |4 aut | |
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