A novel strategy towards sustainable and stable nitritation-denitritation in an A-B process for mainstream municipal wastewater treatment
The conventional activated sludge process is increasingly receiving concerns for its high energy consumption and excess sludge production. To cope with these issues, an A-B process for nitrogen removal via nitritation-denitritation was proposed in previous study which showed the possibility to achie...
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| Fformat: | Journal Article |
| Iaith: | English |
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2020
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| Mynediad Ar-lein: | https://hdl.handle.net/10356/139900 |
| _version_ | 1826115939969531904 |
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| author | Gu, Jun Yang, Qin Liu, Yu |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Gu, Jun Yang, Qin Liu, Yu |
| author_sort | Gu, Jun |
| collection | NTU |
| description | The conventional activated sludge process is increasingly receiving concerns for its high energy consumption and excess sludge production. To cope with these issues, an A-B process for nitrogen removal via nitritation-denitritation was proposed in previous study which showed the possibility to achieve energy self-sufficient wastewater reclamation. However, nitritation-denitritation in such a process could not be sustained due to excessive COD capture at A-stage. In this study a novel A-B process configuration in which a portion of influent was directed to B-stage was developed for sustainable and stable nitrogen removal via nitrite shunt with minimal impacts on energy recovery. In this process configuration, the bypass flow was found to significantly shape microbial community structure by enriching ammonia oxidizer and denitrifiers against nitrite oxidizer. As the result, about 78% of total nitrogen was removed via nitritation-denitritation. In addition, the potential energy recovery and sludge reduction were not compromised in the proposed A-B process with the bypass of influent to B-stage. It is expected that this study may offer a feasible engineering solution for concurrently achieving direct energy recovery from wastewater at A-stage, and sustainable nitritation-denitritation for nitrogen removal at B-stage. |
| first_indexed | 2024-10-01T04:03:19Z |
| format | Journal Article |
| id | ntu-10356/139900 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:03:19Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1399002020-05-22T07:32:24Z A novel strategy towards sustainable and stable nitritation-denitritation in an A-B process for mainstream municipal wastewater treatment Gu, Jun Yang, Qin Liu, Yu School of Civil and Environmental Engineering Interdisciplinary Graduate School (IGS) Advanced Environmental Biotechnology Centre Nanyang Environment and Water Research Institute Engineering::Civil engineering A-B Process Bypassed Influent The conventional activated sludge process is increasingly receiving concerns for its high energy consumption and excess sludge production. To cope with these issues, an A-B process for nitrogen removal via nitritation-denitritation was proposed in previous study which showed the possibility to achieve energy self-sufficient wastewater reclamation. However, nitritation-denitritation in such a process could not be sustained due to excessive COD capture at A-stage. In this study a novel A-B process configuration in which a portion of influent was directed to B-stage was developed for sustainable and stable nitrogen removal via nitrite shunt with minimal impacts on energy recovery. In this process configuration, the bypass flow was found to significantly shape microbial community structure by enriching ammonia oxidizer and denitrifiers against nitrite oxidizer. As the result, about 78% of total nitrogen was removed via nitritation-denitritation. In addition, the potential energy recovery and sludge reduction were not compromised in the proposed A-B process with the bypass of influent to B-stage. It is expected that this study may offer a feasible engineering solution for concurrently achieving direct energy recovery from wastewater at A-stage, and sustainable nitritation-denitritation for nitrogen removal at B-stage. 2020-05-22T07:32:24Z 2020-05-22T07:32:24Z 2018 Journal Article Gu, J., Yang, Q., & Liu, Y. (2018). A novel strategy towards sustainable and stable nitritation-denitritation in an A-B process for mainstream municipal wastewater treatment. Chemosphere, 193, 921-927. doi:10.1016/j.chemosphere.2017.11.038 0045-6535 https://hdl.handle.net/10356/139900 10.1016/j.chemosphere.2017.11.038 29874767 2-s2.0-85035010528 193 921 927 en Chemosphere © 2017 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Civil engineering A-B Process Bypassed Influent Gu, Jun Yang, Qin Liu, Yu A novel strategy towards sustainable and stable nitritation-denitritation in an A-B process for mainstream municipal wastewater treatment |
| title | A novel strategy towards sustainable and stable nitritation-denitritation in an A-B process for mainstream municipal wastewater treatment |
| title_full | A novel strategy towards sustainable and stable nitritation-denitritation in an A-B process for mainstream municipal wastewater treatment |
| title_fullStr | A novel strategy towards sustainable and stable nitritation-denitritation in an A-B process for mainstream municipal wastewater treatment |
| title_full_unstemmed | A novel strategy towards sustainable and stable nitritation-denitritation in an A-B process for mainstream municipal wastewater treatment |
| title_short | A novel strategy towards sustainable and stable nitritation-denitritation in an A-B process for mainstream municipal wastewater treatment |
| title_sort | novel strategy towards sustainable and stable nitritation denitritation in an a b process for mainstream municipal wastewater treatment |
| topic | Engineering::Civil engineering A-B Process Bypassed Influent |
| url | https://hdl.handle.net/10356/139900 |
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