Dual-conditioning of Sludge using Chitosan and Metal Cations
Sludge dewatering is important in sludge management and disposal. In practice, chemical conditioners are often introduced to aid sludge dewatering. This study investigated the simultaneous application of chitosan and metal cations as dual-conditioners to improve sludge dewaterability. The dewatering...
| Main Authors: | , , , , |
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| Format: | Journal Article |
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IWA Publishing
2015
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| Online Access: | http://hdl.handle.net/20.500.11937/21318 |
| _version_ | 1848750556791701504 |
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| author | Lau, Shiew Wei Tang, S.D. Ang, Ming Sen, Tushar Chua, Han Bing |
| author_facet | Lau, Shiew Wei Tang, S.D. Ang, Ming Sen, Tushar Chua, Han Bing |
| author_sort | Lau, Shiew Wei |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Sludge dewatering is important in sludge management and disposal. In practice, chemical conditioners are often introduced to aid sludge dewatering. This study investigated the simultaneous application of chitosan and metal cations as dual-conditioners to improve sludge dewaterability. The dewatering performance of sludge was evaluated using three common measurements, i.e. capillary suction time, specific resistance to filtration, and moisture content of the filtered sludge cake. The effectiveness of metal cations in sludge conditioning and dewatering was found, in ascending order, to be Na+ < K+ ≈ Mg2+ < Ca2+ < Al3+ < Fe3+. Dual-conditioning using chitosan and metal cations further enhanced dewaterability. Cations may have significant effects on sludge conditioning by neutralization of negative surface charges, bridging of floc components, and the salting out effect, leading to improved dewaterability when used in conjunction with chitosan. |
| first_indexed | 2025-11-14T07:38:43Z |
| format | Journal Article |
| id | curtin-20.500.11937-21318 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:38:43Z |
| publishDate | 2015 |
| publisher | IWA Publishing |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-213182019-02-19T05:35:00Z Dual-conditioning of Sludge using Chitosan and Metal Cations Lau, Shiew Wei Tang, S.D. Ang, Ming Sen, Tushar Chua, Han Bing sludge dewatering dual-conditioning chitosan metal cation Sludge dewatering is important in sludge management and disposal. In practice, chemical conditioners are often introduced to aid sludge dewatering. This study investigated the simultaneous application of chitosan and metal cations as dual-conditioners to improve sludge dewaterability. The dewatering performance of sludge was evaluated using three common measurements, i.e. capillary suction time, specific resistance to filtration, and moisture content of the filtered sludge cake. The effectiveness of metal cations in sludge conditioning and dewatering was found, in ascending order, to be Na+ < K+ ≈ Mg2+ < Ca2+ < Al3+ < Fe3+. Dual-conditioning using chitosan and metal cations further enhanced dewaterability. Cations may have significant effects on sludge conditioning by neutralization of negative surface charges, bridging of floc components, and the salting out effect, leading to improved dewaterability when used in conjunction with chitosan. 2015 Journal Article http://hdl.handle.net/20.500.11937/21318 10.2166/wpt.2015.047 IWA Publishing fulltext |
| spellingShingle | sludge dewatering dual-conditioning chitosan metal cation Lau, Shiew Wei Tang, S.D. Ang, Ming Sen, Tushar Chua, Han Bing Dual-conditioning of Sludge using Chitosan and Metal Cations |
| title | Dual-conditioning of Sludge using Chitosan and Metal Cations |
| title_full | Dual-conditioning of Sludge using Chitosan and Metal Cations |
| title_fullStr | Dual-conditioning of Sludge using Chitosan and Metal Cations |
| title_full_unstemmed | Dual-conditioning of Sludge using Chitosan and Metal Cations |
| title_short | Dual-conditioning of Sludge using Chitosan and Metal Cations |
| title_sort | dual-conditioning of sludge using chitosan and metal cations |
| topic | sludge dewatering dual-conditioning chitosan metal cation |
| url | http://hdl.handle.net/20.500.11937/21318 |