Experimental investigation on smoldering combustion for sewage sludge treatment: Influence of key parameters and self-sustaining limit
The disposal of sewage sludge has become a challenge in recent years. Smoldering combustion is a novel, low-energy, and promising new method for sewage sludge disposal. In this study, sawdust was used as auxiliary fuel to mix sewage sludge and sand to form a porous media fuel bed for smoldering comb...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-01-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X24017040 |
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| author | Xue Shen Hui Yan Jun Shi Yu Tan Han Yang Honghao Hu Sha Li |
| author_facet | Xue Shen Hui Yan Jun Shi Yu Tan Han Yang Honghao Hu Sha Li |
| author_sort | Xue Shen |
| collection | DOAJ |
| description | The disposal of sewage sludge has become a challenge in recent years. Smoldering combustion is a novel, low-energy, and promising new method for sewage sludge disposal. In this study, sawdust was used as auxiliary fuel to mix sewage sludge and sand to form a porous media fuel bed for smoldering combustion. The effects of key parameters such as moisture content, sand ratio, airflow rate, and sawdust amount on the sewage sludge smoldering characteristics were studied. And smoldering self-sustaining limits were explored to ensure stable operation in practical applications. The results showed that reducing the moisture content could improve the robustness of sewage sludge smoldering combustion and reduce the preheating time. Airflow rate and S/F ratios were the main factors controlling the peak temperature and smoldering velocity. The optimal sand-to-fuel mass ratio (S/F) was 3, not only the smoldering velocity was maximum, but also sewage sludge with less sawdust added and higher moisture content could be treated. |
| format | Article |
| id | doaj-art-52ca41b1225345e68b57bbdfb84cebe3 |
| institution | Kabale University |
| issn | 2214-157X |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-52ca41b1225345e68b57bbdfb84cebe32025-01-08T04:52:51ZengElsevierCase Studies in Thermal Engineering2214-157X2025-01-0165105673Experimental investigation on smoldering combustion for sewage sludge treatment: Influence of key parameters and self-sustaining limitXue Shen0Hui Yan1Jun Shi2Yu Tan3Han Yang4Honghao Hu5Sha Li6School of Mechanical and Power Engineering, Chongqing University of Science and Technology, Chongqing, 401331, PR ChinaCorresponding author.; School of Mechanical and Power Engineering, Chongqing University of Science and Technology, Chongqing, 401331, PR ChinaSchool of Mechanical and Power Engineering, Chongqing University of Science and Technology, Chongqing, 401331, PR ChinaSchool of Mechanical and Power Engineering, Chongqing University of Science and Technology, Chongqing, 401331, PR ChinaSchool of Mechanical and Power Engineering, Chongqing University of Science and Technology, Chongqing, 401331, PR ChinaSchool of Mechanical and Power Engineering, Chongqing University of Science and Technology, Chongqing, 401331, PR ChinaSchool of Mechanical and Power Engineering, Chongqing University of Science and Technology, Chongqing, 401331, PR ChinaThe disposal of sewage sludge has become a challenge in recent years. Smoldering combustion is a novel, low-energy, and promising new method for sewage sludge disposal. In this study, sawdust was used as auxiliary fuel to mix sewage sludge and sand to form a porous media fuel bed for smoldering combustion. The effects of key parameters such as moisture content, sand ratio, airflow rate, and sawdust amount on the sewage sludge smoldering characteristics were studied. And smoldering self-sustaining limits were explored to ensure stable operation in practical applications. The results showed that reducing the moisture content could improve the robustness of sewage sludge smoldering combustion and reduce the preheating time. Airflow rate and S/F ratios were the main factors controlling the peak temperature and smoldering velocity. The optimal sand-to-fuel mass ratio (S/F) was 3, not only the smoldering velocity was maximum, but also sewage sludge with less sawdust added and higher moisture content could be treated.http://www.sciencedirect.com/science/article/pii/S2214157X24017040Sewage sludgeSmoldering combustionWaste disposalSelf-sustaining propagation |
| spellingShingle | Xue Shen Hui Yan Jun Shi Yu Tan Han Yang Honghao Hu Sha Li Experimental investigation on smoldering combustion for sewage sludge treatment: Influence of key parameters and self-sustaining limit Case Studies in Thermal Engineering Sewage sludge Smoldering combustion Waste disposal Self-sustaining propagation |
| title | Experimental investigation on smoldering combustion for sewage sludge treatment: Influence of key parameters and self-sustaining limit |
| title_full | Experimental investigation on smoldering combustion for sewage sludge treatment: Influence of key parameters and self-sustaining limit |
| title_fullStr | Experimental investigation on smoldering combustion for sewage sludge treatment: Influence of key parameters and self-sustaining limit |
| title_full_unstemmed | Experimental investigation on smoldering combustion for sewage sludge treatment: Influence of key parameters and self-sustaining limit |
| title_short | Experimental investigation on smoldering combustion for sewage sludge treatment: Influence of key parameters and self-sustaining limit |
| title_sort | experimental investigation on smoldering combustion for sewage sludge treatment influence of key parameters and self sustaining limit |
| topic | Sewage sludge Smoldering combustion Waste disposal Self-sustaining propagation |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X24017040 |
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