Achieving Ammonium Removal Through Anammox-Derived Feammox With Low Demand of Fe(III)
Feammox-based nitrogen removal technology can reduce energy consumption by aeration and emission of carbon dioxide. However, the huge theoretical demand for Fe(III) becomes a challenge for the further development of Feammox. This study investigated an anammox-derived Feammox process with an intermit...
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| Format: | Article |
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Frontiers Media S.A.
2022-06-01
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| Series: | Frontiers in Microbiology |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmicb.2022.918634/full |
| _version_ | 1818545355546951680 |
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| author | Lanlan Hu Xiaohui Cheng Guangxia Qi Min Zheng Yan Dang Jiyun Li Kangning Xu |
| author_facet | Lanlan Hu Xiaohui Cheng Guangxia Qi Min Zheng Yan Dang Jiyun Li Kangning Xu |
| author_sort | Lanlan Hu |
| collection | DOAJ |
| description | Feammox-based nitrogen removal technology can reduce energy consumption by aeration and emission of carbon dioxide. However, the huge theoretical demand for Fe(III) becomes a challenge for the further development of Feammox. This study investigated an anammox-derived Feammox process with an intermittent dosage of Fe2O3 and proposed a novel approach to reduce the Fe(III) consumption. The results showed that anammox genera Candidatus Brocadia and Candidatus Kuenenia in the seed anammox sludge significantly decreased after cultivation. The formation of N2 was the dominating pathway in Feammox while that of nitrite and nitrate could be neglected. Batch tests showed that specific Feammox activity of ammonium oxidation was 1.14–9.98 mg N/(g VSS·d). The maximum removal efficiency of ammonium reached 52.3% in the bioreactor with a low dosage of Fe(III) which was only 5.8% of the theoretical demand in Feammox. The removal of ammonium was mainly achieved through Feammox, while partial nitrification/anammox also played a role due to the non-power and unintentional oxygen leakage. The super-low oxygen also responded to the low demand of Fe(III) in the bioreactor because it could trigger the cycle of Fe(III)/Fe(II) by coupling Feammox and chemical oxidation of Fe(II) to Fe(III). Therefore, anammox-derived Feammox can achieve the removal of ammonium with low Fe(III) demand at super-low oxygen. |
| first_indexed | 2024-12-12T07:39:13Z |
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| id | doaj.art-1585a0f7ea9244eaa6773efe9b55f7ca |
| institution | Directory Open Access Journal |
| issn | 1664-302X |
| language | English |
| last_indexed | 2024-12-12T07:39:13Z |
| publishDate | 2022-06-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Microbiology |
| spelling | doaj.art-1585a0f7ea9244eaa6773efe9b55f7ca2022-12-22T00:32:50ZengFrontiers Media S.A.Frontiers in Microbiology1664-302X2022-06-011310.3389/fmicb.2022.918634918634Achieving Ammonium Removal Through Anammox-Derived Feammox With Low Demand of Fe(III)Lanlan Hu0Xiaohui Cheng1Guangxia Qi2Min Zheng3Yan Dang4Jiyun Li5Kangning Xu6Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, ChinaBeijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, ChinaKey Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry, Beijing Technology and Business University, Beijing, ChinaAustralian Centre for Water and Environmental Biotechnology, The University of Queensland, St Lucia, QLD, AustraliaBeijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, ChinaSchool of Environment, Tsinghua University, Beijing, ChinaBeijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, ChinaFeammox-based nitrogen removal technology can reduce energy consumption by aeration and emission of carbon dioxide. However, the huge theoretical demand for Fe(III) becomes a challenge for the further development of Feammox. This study investigated an anammox-derived Feammox process with an intermittent dosage of Fe2O3 and proposed a novel approach to reduce the Fe(III) consumption. The results showed that anammox genera Candidatus Brocadia and Candidatus Kuenenia in the seed anammox sludge significantly decreased after cultivation. The formation of N2 was the dominating pathway in Feammox while that of nitrite and nitrate could be neglected. Batch tests showed that specific Feammox activity of ammonium oxidation was 1.14–9.98 mg N/(g VSS·d). The maximum removal efficiency of ammonium reached 52.3% in the bioreactor with a low dosage of Fe(III) which was only 5.8% of the theoretical demand in Feammox. The removal of ammonium was mainly achieved through Feammox, while partial nitrification/anammox also played a role due to the non-power and unintentional oxygen leakage. The super-low oxygen also responded to the low demand of Fe(III) in the bioreactor because it could trigger the cycle of Fe(III)/Fe(II) by coupling Feammox and chemical oxidation of Fe(II) to Fe(III). Therefore, anammox-derived Feammox can achieve the removal of ammonium with low Fe(III) demand at super-low oxygen.https://www.frontiersin.org/articles/10.3389/fmicb.2022.918634/fullFeammoxanammoxspecific activityammonium removaliron reduction |
| spellingShingle | Lanlan Hu Xiaohui Cheng Guangxia Qi Min Zheng Yan Dang Jiyun Li Kangning Xu Achieving Ammonium Removal Through Anammox-Derived Feammox With Low Demand of Fe(III) Frontiers in Microbiology Feammox anammox specific activity ammonium removal iron reduction |
| title | Achieving Ammonium Removal Through Anammox-Derived Feammox With Low Demand of Fe(III) |
| title_full | Achieving Ammonium Removal Through Anammox-Derived Feammox With Low Demand of Fe(III) |
| title_fullStr | Achieving Ammonium Removal Through Anammox-Derived Feammox With Low Demand of Fe(III) |
| title_full_unstemmed | Achieving Ammonium Removal Through Anammox-Derived Feammox With Low Demand of Fe(III) |
| title_short | Achieving Ammonium Removal Through Anammox-Derived Feammox With Low Demand of Fe(III) |
| title_sort | achieving ammonium removal through anammox derived feammox with low demand of fe iii |
| topic | Feammox anammox specific activity ammonium removal iron reduction |
| url | https://www.frontiersin.org/articles/10.3389/fmicb.2022.918634/full |
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