Multi-parameter control-based operation strategy for mainstream deammonification in an integrated anaerobic biofilm reactor-step feed MBR
The mainstream deammonification of municipal wastewater has been recognized as one of the greatest challenges in wastewater engineering. The conventional activated sludge process has disadvantages of high energy input and sludge production. To tackle this situation, an innovative A-B process, where...
| Main Authors: | , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/170026 |
| _version_ | 1811693810807209984 |
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| author | Geng, Yikun Gu, Jun Zhang, Xiaoyuan Lim, Zhuan Khai Jiang, Yishuai Zhang, Meng Zhou, Yan Liu, Yu |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Geng, Yikun Gu, Jun Zhang, Xiaoyuan Lim, Zhuan Khai Jiang, Yishuai Zhang, Meng Zhou, Yan Liu, Yu |
| author_sort | Geng, Yikun |
| collection | NTU |
| description | The mainstream deammonification of municipal wastewater has been recognized as one of the greatest challenges in wastewater engineering. The conventional activated sludge process has disadvantages of high energy input and sludge production. To tackle this situation, an innovative A-B process, where an anaerobic biofilm reactor (AnBR) functioned as the A stage for energy recovery, and a step-feed membrane bioreactor (MBR) functioned as the B stage for mainstream deammonification, was constructed for carbon-neutral wastewater treatment. For addressing the challenge associated with selective retention of ammonia-oxidizing bacteria (AOB) over nitrite oxidizing bacteria (NOB), a multi-parameter control-based operation strategy was developed with synergistic control of influent COD redistribution, dissolved oxygen (DO) concentration and sludge retention time (SRT) in the innovative AnBR - step-feed MBR system. Results showed that more than 85% of wastewater COD could be removed with the direct production of methane gas in the AnBR. A relatively stable partial nitritation, which is a prerequisite of anammox, was achieved with the successful suppression of NOB, leading to 98% of ammonium-N and 73% of total nitrogen removed. Anammox bacteria could well survive and enrich in the integrated system, and the contribution of anammox to the total nitrogen removal was more than 70% at optimal conditions. Reactions network involved in the nitrogen transformation in the integrated system was further constructed through the mass balance and microbial community structure analyses. Consequently, this study demonstrated a practically feasible process configuration with high operation and control flexibility towards stable mainstream deammonification of municipal wastewater. |
| first_indexed | 2024-10-01T06:57:36Z |
| format | Journal Article |
| id | ntu-10356/170026 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:57:36Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1700262023-08-22T03:54:19Z Multi-parameter control-based operation strategy for mainstream deammonification in an integrated anaerobic biofilm reactor-step feed MBR Geng, Yikun Gu, Jun Zhang, Xiaoyuan Lim, Zhuan Khai Jiang, Yishuai Zhang, Meng Zhou, Yan Liu, Yu School of Civil and Environmental Engineering Nanyang Environment and Water Research Institute Advanced Environmental Biotechnology Center Engineering::Environmental engineering Ammonium Compounds Anaerobiosis The mainstream deammonification of municipal wastewater has been recognized as one of the greatest challenges in wastewater engineering. The conventional activated sludge process has disadvantages of high energy input and sludge production. To tackle this situation, an innovative A-B process, where an anaerobic biofilm reactor (AnBR) functioned as the A stage for energy recovery, and a step-feed membrane bioreactor (MBR) functioned as the B stage for mainstream deammonification, was constructed for carbon-neutral wastewater treatment. For addressing the challenge associated with selective retention of ammonia-oxidizing bacteria (AOB) over nitrite oxidizing bacteria (NOB), a multi-parameter control-based operation strategy was developed with synergistic control of influent COD redistribution, dissolved oxygen (DO) concentration and sludge retention time (SRT) in the innovative AnBR - step-feed MBR system. Results showed that more than 85% of wastewater COD could be removed with the direct production of methane gas in the AnBR. A relatively stable partial nitritation, which is a prerequisite of anammox, was achieved with the successful suppression of NOB, leading to 98% of ammonium-N and 73% of total nitrogen removed. Anammox bacteria could well survive and enrich in the integrated system, and the contribution of anammox to the total nitrogen removal was more than 70% at optimal conditions. Reactions network involved in the nitrogen transformation in the integrated system was further constructed through the mass balance and microbial community structure analyses. Consequently, this study demonstrated a practically feasible process configuration with high operation and control flexibility towards stable mainstream deammonification of municipal wastewater. National Research Foundation (NRF) This work is supported by a grant from the Singapore's National Research Foundation under Urban Solutions & Sustainability, which is administered by PUB, Singapore's national water agency. 2023-08-22T03:54:19Z 2023-08-22T03:54:19Z 2023 Journal Article Geng, Y., Gu, J., Zhang, X., Lim, Z. K., Jiang, Y., Zhang, M., Zhou, Y. & Liu, Y. (2023). Multi-parameter control-based operation strategy for mainstream deammonification in an integrated anaerobic biofilm reactor-step feed MBR. Chemosphere, 333, 138941-. https://dx.doi.org/10.1016/j.chemosphere.2023.138941 0045-6535 https://hdl.handle.net/10356/170026 10.1016/j.chemosphere.2023.138941 37187373 2-s2.0-85159588796 333 138941 en Chemosphere © 2023 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Environmental engineering Ammonium Compounds Anaerobiosis Geng, Yikun Gu, Jun Zhang, Xiaoyuan Lim, Zhuan Khai Jiang, Yishuai Zhang, Meng Zhou, Yan Liu, Yu Multi-parameter control-based operation strategy for mainstream deammonification in an integrated anaerobic biofilm reactor-step feed MBR |
| title | Multi-parameter control-based operation strategy for mainstream deammonification in an integrated anaerobic biofilm reactor-step feed MBR |
| title_full | Multi-parameter control-based operation strategy for mainstream deammonification in an integrated anaerobic biofilm reactor-step feed MBR |
| title_fullStr | Multi-parameter control-based operation strategy for mainstream deammonification in an integrated anaerobic biofilm reactor-step feed MBR |
| title_full_unstemmed | Multi-parameter control-based operation strategy for mainstream deammonification in an integrated anaerobic biofilm reactor-step feed MBR |
| title_short | Multi-parameter control-based operation strategy for mainstream deammonification in an integrated anaerobic biofilm reactor-step feed MBR |
| title_sort | multi parameter control based operation strategy for mainstream deammonification in an integrated anaerobic biofilm reactor step feed mbr |
| topic | Engineering::Environmental engineering Ammonium Compounds Anaerobiosis |
| url | https://hdl.handle.net/10356/170026 |
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