Assessment of the applied potential of sludge-derived hydrochar in terms of process parameters and product properties
Hydrothermal carbonization (HTC) is beneficial for the disposal of high-moisture organic waste such as sludge. However, the relationship between HTC parameters and hydrochars has not been fully explored, and most studies have focused on single or dual parameters. This paper systematically studied ho...
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Académie des sciences
2024-10-01
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| Series: | Comptes Rendus. Chimie |
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| Online Access: | https://comptes-rendus.academie-sciences.fr/chimie/articles/10.5802/crchim.333/ |
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| author | Zhang, Chuang Wang, Bingyu Wang, Jixiang Rong, Shaopeng Xie, Huifang Qu, Hongxia Feng, Yanfang |
| author_facet | Zhang, Chuang Wang, Bingyu Wang, Jixiang Rong, Shaopeng Xie, Huifang Qu, Hongxia Feng, Yanfang |
| author_sort | Zhang, Chuang |
| collection | DOAJ |
| description | Hydrothermal carbonization (HTC) is beneficial for the disposal of high-moisture organic waste such as sludge. However, the relationship between HTC parameters and hydrochars has not been fully explored, and most studies have focused on single or dual parameters. This paper systematically studied how hydrothermal intensity and solid loading affected the HTC process, hydrochar yield, and composition properties. The results revealed that the organic matter or ash content in sludge was a vital factor affecting the fuel properties of hydrochars. The hydrothermal intensity was a critical process parameter for hydrochars’ structural properties. The solid loading had no apparent effect on hydrochars but had a considerable effect on energy consumption in the HTC process. When the moisture content of sludge was 80.3%, the energy recoverable by hydrochars could be sufficient for the material to be heated up to phase transition. Evaluations of sludge characteristics in different regions and treatment processes were conducted, allowing HTC process parameters to be optimized in correlation with future resource utilization approaches. If the sludge contains a great deal of organic matter and is used as a fuel to generate energy, it can be subjected to a milder hydrothermal intensity like 180–220 °C for 1–2 h. If the heavy metal content in the sludge meets land-use requirements, a more intense hydrothermal intensity may be applied such as 260 °C for 1–4 h. This study provides a reference for the design, optimization, and scaling of HTC for sludge treatment. |
| format | Article |
| id | doaj-art-a64f745dfe0d498fb39a446c5bc4c5fd |
| institution | Kabale University |
| issn | 1878-1543 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | Académie des sciences |
| record_format | Article |
| series | Comptes Rendus. Chimie |
| spelling | doaj-art-a64f745dfe0d498fb39a446c5bc4c5fd2025-02-07T13:40:47ZengAcadémie des sciencesComptes Rendus. Chimie1878-15432024-10-0111810.5802/crchim.33310.5802/crchim.333Assessment of the applied potential of sludge-derived hydrochar in terms of process parameters and product propertiesZhang, Chuang0Wang, Bingyu1https://orcid.org/0000-0001-5865-4849Wang, Jixiang2Rong, Shaopeng3https://orcid.org/0000-0003-0899-871X Xie, Huifang4https://orcid.org/0000-0001-6082-7112Qu, Hongxia5Feng, Yanfang6https://orcid.org/0000-0001-6251-7660Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, ChinaJiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, ChinaJiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China; Key Laboratory of Agro-Environment in Downstream of Yangtze Plain, National Agricultural Experiment Station for Agricultural Environment, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, ChinaJiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, ChinaJiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, ChinaSchool of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu Province, ChinaKey Laboratory of Agro-Environment in Downstream of Yangtze Plain, National Agricultural Experiment Station for Agricultural Environment, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, ChinaHydrothermal carbonization (HTC) is beneficial for the disposal of high-moisture organic waste such as sludge. However, the relationship between HTC parameters and hydrochars has not been fully explored, and most studies have focused on single or dual parameters. This paper systematically studied how hydrothermal intensity and solid loading affected the HTC process, hydrochar yield, and composition properties. The results revealed that the organic matter or ash content in sludge was a vital factor affecting the fuel properties of hydrochars. The hydrothermal intensity was a critical process parameter for hydrochars’ structural properties. The solid loading had no apparent effect on hydrochars but had a considerable effect on energy consumption in the HTC process. When the moisture content of sludge was 80.3%, the energy recoverable by hydrochars could be sufficient for the material to be heated up to phase transition. Evaluations of sludge characteristics in different regions and treatment processes were conducted, allowing HTC process parameters to be optimized in correlation with future resource utilization approaches. If the sludge contains a great deal of organic matter and is used as a fuel to generate energy, it can be subjected to a milder hydrothermal intensity like 180–220 °C for 1–2 h. If the heavy metal content in the sludge meets land-use requirements, a more intense hydrothermal intensity may be applied such as 260 °C for 1–4 h. This study provides a reference for the design, optimization, and scaling of HTC for sludge treatment.https://comptes-rendus.academie-sciences.fr/chimie/articles/10.5802/crchim.333/SludgeHydrothermal carbonizationHydrocharHydrothermal intensitySolid loading |
| spellingShingle | Zhang, Chuang Wang, Bingyu Wang, Jixiang Rong, Shaopeng Xie, Huifang Qu, Hongxia Feng, Yanfang Assessment of the applied potential of sludge-derived hydrochar in terms of process parameters and product properties Comptes Rendus. Chimie Sludge Hydrothermal carbonization Hydrochar Hydrothermal intensity Solid loading |
| title | Assessment of the applied potential of sludge-derived hydrochar in terms of process parameters and product properties |
| title_full | Assessment of the applied potential of sludge-derived hydrochar in terms of process parameters and product properties |
| title_fullStr | Assessment of the applied potential of sludge-derived hydrochar in terms of process parameters and product properties |
| title_full_unstemmed | Assessment of the applied potential of sludge-derived hydrochar in terms of process parameters and product properties |
| title_short | Assessment of the applied potential of sludge-derived hydrochar in terms of process parameters and product properties |
| title_sort | assessment of the applied potential of sludge derived hydrochar in terms of process parameters and product properties |
| topic | Sludge Hydrothermal carbonization Hydrochar Hydrothermal intensity Solid loading |
| url | https://comptes-rendus.academie-sciences.fr/chimie/articles/10.5802/crchim.333/ |
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