Converting sludge to slag through a high temperature slagging co-gasification process: an evaluation based on a demonstration trial and life cycle assessment
A variety of sludge-based waste materials with distinctive physical and chemical characteristics are co-treated with municipal solid waste (MSW) in a demonstration-scale high-temperature slagging gasifier. The waste materials tested include dewatered sewage sludge (originated from industrial and mun...
| 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/10356/169297 |
| _version_ | 1826120775016382464 |
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| author | Fu, Xiaoxu Chan, Wei Ping Chin, Vernette Boon, Yinn Zhao Chen, Wenqian Zhao, Ya Heberlein, Stephan Gu, Yan Oh, James Lisak, Grzegorz |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Fu, Xiaoxu Chan, Wei Ping Chin, Vernette Boon, Yinn Zhao Chen, Wenqian Zhao, Ya Heberlein, Stephan Gu, Yan Oh, James Lisak, Grzegorz |
| author_sort | Fu, Xiaoxu |
| collection | NTU |
| description | A variety of sludge-based waste materials with distinctive physical and chemical characteristics are co-treated with municipal solid waste (MSW) in a demonstration-scale high-temperature slagging gasifier. The waste materials tested include dewatered sewage sludge (originated from industrial and municipal wastewater treatment processes, respectively), dried sewage sludge, sludge incineration ashes, and waterworks sludge (originated from freshwater treatment process). Up to 49.5% by mass of dried sewage sludge is successfully co-gasified with MSW and up to 89.5% of the solid residues from the gasification process is recovered as reusable slag and recyclable metals. Despite feeding of various waste mixtures, stable operation of the slagging gasifier is achieved with the proper control of the temperature profiles inside the gasifier, the melting of inorganic residues, smooth discharge of the molten slag, and effective flue gas emissions control. Various types of waste-derived slag are characterized to evaluate their potentials to be applied as sustainable construction materials. Toxicity characteristic leaching procedure (TCLP) and compliance batch leaching test results indicate that the sludge-derived slag is environmentally safe with very low pollution potential. In addition, life cycle assessment (LCA) is performed to comprehensively evaluate the treatment of sludge-based waste materials via slagging co-gasification technology. These findings reveal the promising potentials of converting sludge to slag through the high temperature slagging gasification process based on both engineering and environmental aspects, as well as the possible areas for further advancement in the future. |
| first_indexed | 2024-10-01T05:21:56Z |
| format | Journal Article |
| id | ntu-10356/169297 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:21:56Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1692972023-07-12T15:34:43Z Converting sludge to slag through a high temperature slagging co-gasification process: an evaluation based on a demonstration trial and life cycle assessment Fu, Xiaoxu Chan, Wei Ping Chin, Vernette Boon, Yinn Zhao Chen, Wenqian Zhao, Ya Heberlein, Stephan Gu, Yan Oh, James Lisak, Grzegorz School of Civil and Environmental Engineering Nanyang Environment and Water Research Institute Residues and Resource Reclamation Centre Engineering::Environmental engineering Sewage Sludge Waterworks Sludge A variety of sludge-based waste materials with distinctive physical and chemical characteristics are co-treated with municipal solid waste (MSW) in a demonstration-scale high-temperature slagging gasifier. The waste materials tested include dewatered sewage sludge (originated from industrial and municipal wastewater treatment processes, respectively), dried sewage sludge, sludge incineration ashes, and waterworks sludge (originated from freshwater treatment process). Up to 49.5% by mass of dried sewage sludge is successfully co-gasified with MSW and up to 89.5% of the solid residues from the gasification process is recovered as reusable slag and recyclable metals. Despite feeding of various waste mixtures, stable operation of the slagging gasifier is achieved with the proper control of the temperature profiles inside the gasifier, the melting of inorganic residues, smooth discharge of the molten slag, and effective flue gas emissions control. Various types of waste-derived slag are characterized to evaluate their potentials to be applied as sustainable construction materials. Toxicity characteristic leaching procedure (TCLP) and compliance batch leaching test results indicate that the sludge-derived slag is environmentally safe with very low pollution potential. In addition, life cycle assessment (LCA) is performed to comprehensively evaluate the treatment of sludge-based waste materials via slagging co-gasification technology. These findings reveal the promising potentials of converting sludge to slag through the high temperature slagging gasification process based on both engineering and environmental aspects, as well as the possible areas for further advancement in the future. National Research Foundation (NRF) Public Utilities Board (PUB) Submitted/Accepted version The authors would like to acknowledge the Public Utilities Board (PUB) of Singapore for the financial support to the project, and National Research Foundation (NRF) of Singapore, National Environmental Agency (NEA) and Economic Development Board (EDB) of Singapore for supporting the construction and operation of Waste-to-Energy Research Facility. Additionally, this research is supported by the National Research Foundation, Singapore, and PUB, Singapore’s National Water Agency under its RIE2025 Urban Solutions and Sustainability (USS) (Water) Centre of Excellence (CoE) Programme which provides funding to the Nanyang Environment & Water Research Institute (NEWRI) of the Nanyang Technological University, Singapore (NTU). 2023-07-11T07:01:55Z 2023-07-11T07:01:55Z 2023 Journal Article Fu, X., Chan, W. P., Chin, V., Boon, Y. Z., Chen, W., Zhao, Y., Heberlein, S., Gu, Y., Oh, J. & Lisak, G. (2023). Converting sludge to slag through a high temperature slagging co-gasification process: an evaluation based on a demonstration trial and life cycle assessment. Chemical Engineering Journal, 468, 143475-. https://dx.doi.org/10.1016/j.cej.2023.143475 1385-8947 https://hdl.handle.net/10356/169297 10.1016/j.cej.2023.143475 2-s2.0-85159883093 468 143475 en Chemical Engineering Journal © 2023 Elsevier B.V. All rights reserved. This paper was published in Chemical Engineering Journal and is made available with permission of 2023 Elsevier B.V. application/pdf |
| spellingShingle | Engineering::Environmental engineering Sewage Sludge Waterworks Sludge Fu, Xiaoxu Chan, Wei Ping Chin, Vernette Boon, Yinn Zhao Chen, Wenqian Zhao, Ya Heberlein, Stephan Gu, Yan Oh, James Lisak, Grzegorz Converting sludge to slag through a high temperature slagging co-gasification process: an evaluation based on a demonstration trial and life cycle assessment |
| title | Converting sludge to slag through a high temperature slagging co-gasification process: an evaluation based on a demonstration trial and life cycle assessment |
| title_full | Converting sludge to slag through a high temperature slagging co-gasification process: an evaluation based on a demonstration trial and life cycle assessment |
| title_fullStr | Converting sludge to slag through a high temperature slagging co-gasification process: an evaluation based on a demonstration trial and life cycle assessment |
| title_full_unstemmed | Converting sludge to slag through a high temperature slagging co-gasification process: an evaluation based on a demonstration trial and life cycle assessment |
| title_short | Converting sludge to slag through a high temperature slagging co-gasification process: an evaluation based on a demonstration trial and life cycle assessment |
| title_sort | converting sludge to slag through a high temperature slagging co gasification process an evaluation based on a demonstration trial and life cycle assessment |
| topic | Engineering::Environmental engineering Sewage Sludge Waterworks Sludge |
| url | https://hdl.handle.net/10356/169297 |
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