Organics transformation and energy production potential in a high rate A-stage system: a demo-scale study
Current high-rate activated sludge (HRAS) process is an aerobic A-stage process that would cause significant organic loss resulted from the mineralization. In this study, the feasibility of operating a high rate A-stage without aeration (HRNS) was carried out in a demo-scale plant (275 m3/h). The or...
| Main Authors: | , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2022
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| Online Access: | https://hdl.handle.net/10356/161203 |
| _version_ | 1824453525651849216 |
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| author | Cao, Shenbin Lu, Dan Phua, KianMing Yan, Wangwang Le, Chencheng Tao, Guihe Zhou, Yan |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Cao, Shenbin Lu, Dan Phua, KianMing Yan, Wangwang Le, Chencheng Tao, Guihe Zhou, Yan |
| author_sort | Cao, Shenbin |
| collection | NTU |
| description | Current high-rate activated sludge (HRAS) process is an aerobic A-stage process that would cause significant organic loss resulted from the mineralization. In this study, the feasibility of operating a high rate A-stage without aeration (HRNS) was carried out in a demo-scale plant (275 m3/h). The organics transformation and energy production potential in A-stage were explored. The developed A-stage process was demonstrated to be more effective for organics recovery compared to that operated with aeration (53.82% versus 40.94%), despite its relatively low total COD removal efficiency (54.3% versus 63.5% with aeration). Minor organics (accounted for 1.75% of incoming COD) was found to be lost in HRNS process. Moreover, sludge generated from HRNS had higher degradability and higher methane compared to that from HRAS. Overall, this study documented the feasibility of high rate A-stage without aeration, and acted as a guide in achieving energy neutrality or even energy-positive wastewater treatment. |
| first_indexed | 2025-02-19T03:07:48Z |
| format | Journal Article |
| id | ntu-10356/161203 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:07:48Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1612032022-08-19T05:03:32Z Organics transformation and energy production potential in a high rate A-stage system: a demo-scale study Cao, Shenbin Lu, Dan Phua, KianMing Yan, Wangwang Le, Chencheng Tao, Guihe Zhou, Yan School of Civil and Environmental Engineering Nanyang Environment and Water Research Institute Engineering::Environmental engineering Organics Transformation Biochemical Methane Potential Current high-rate activated sludge (HRAS) process is an aerobic A-stage process that would cause significant organic loss resulted from the mineralization. In this study, the feasibility of operating a high rate A-stage without aeration (HRNS) was carried out in a demo-scale plant (275 m3/h). The organics transformation and energy production potential in A-stage were explored. The developed A-stage process was demonstrated to be more effective for organics recovery compared to that operated with aeration (53.82% versus 40.94%), despite its relatively low total COD removal efficiency (54.3% versus 63.5% with aeration). Minor organics (accounted for 1.75% of incoming COD) was found to be lost in HRNS process. Moreover, sludge generated from HRNS had higher degradability and higher methane compared to that from HRAS. Overall, this study documented the feasibility of high rate A-stage without aeration, and acted as a guide in achieving energy neutrality or even energy-positive wastewater treatment. Public Utilities Board (PUB) The authors would like to thank the Public Utilities Board (PUB) of Singapore for financial support of the project “Investigation of energy production potential and sludge rheology of an A/B process in UPWRP Integrated Validation & Demonstration Plant”. 2022-08-19T05:03:32Z 2022-08-19T05:03:32Z 2020 Journal Article Cao, S., Lu, D., Phua, K., Yan, W., Le, C., Tao, G. & Zhou, Y. (2020). Organics transformation and energy production potential in a high rate A-stage system: a demo-scale study. Bioresource Technology, 295, 122300-. https://dx.doi.org/10.1016/j.biortech.2019.122300 0960-8524 https://hdl.handle.net/10356/161203 10.1016/j.biortech.2019.122300 31669872 2-s2.0-85073948249 295 122300 en Bioresource Technology © 2019 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Environmental engineering Organics Transformation Biochemical Methane Potential Cao, Shenbin Lu, Dan Phua, KianMing Yan, Wangwang Le, Chencheng Tao, Guihe Zhou, Yan Organics transformation and energy production potential in a high rate A-stage system: a demo-scale study |
| title | Organics transformation and energy production potential in a high rate A-stage system: a demo-scale study |
| title_full | Organics transformation and energy production potential in a high rate A-stage system: a demo-scale study |
| title_fullStr | Organics transformation and energy production potential in a high rate A-stage system: a demo-scale study |
| title_full_unstemmed | Organics transformation and energy production potential in a high rate A-stage system: a demo-scale study |
| title_short | Organics transformation and energy production potential in a high rate A-stage system: a demo-scale study |
| title_sort | organics transformation and energy production potential in a high rate a stage system a demo scale study |
| topic | Engineering::Environmental engineering Organics Transformation Biochemical Methane Potential |
| url | https://hdl.handle.net/10356/161203 |
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