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: | Conference Paper |
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Singapore International Water Week - Water Convention
2014
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| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.11937/23013 |
| _version_ | 1848751033041289216 |
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| author | Lau, Shiew Wei Tang, S.D. Ang, Ming Sen, Tushar Chua, Han Bing |
| author2 | Singapore International Water Week - Water Convention |
| author_facet | Singapore International Water Week - Water Convention 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. the capillary suction time (CST) test, specific resistance to filtration (SRF) test, and moisture content of the filtered sludge cake. The effectiveness of metal cation in sludge conditioning and dewatering was found in an ascending order of Na+ < K+ ≈ Mg2+ < Ca2+ < Al3+ < Fe3+. Dual-conditioning using chitosan and metal cation further enhanced sludge dewaterability in a similar manner. Cations may have significant effects on sludge conditioning by neutralisation of the negative surface charges, bridging of the floc components and salting out effect, leading to improved dewaterability when used in conjunction with chitosan. |
| first_indexed | 2025-11-14T07:46:17Z |
| format | Conference Paper |
| id | curtin-20.500.11937-23013 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:46:17Z |
| publishDate | 2014 |
| publisher | Singapore International Water Week - Water Convention |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-230132017-01-30T12:34:56Z Dual-Conditioning of Sludge using Chitosan and Metal Cations Lau, Shiew Wei Tang, S.D. Ang, Ming Sen, Tushar Chua, Han Bing Singapore International Water Week - Water Convention 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. the capillary suction time (CST) test, specific resistance to filtration (SRF) test, and moisture content of the filtered sludge cake. The effectiveness of metal cation in sludge conditioning and dewatering was found in an ascending order of Na+ < K+ ≈ Mg2+ < Ca2+ < Al3+ < Fe3+. Dual-conditioning using chitosan and metal cation further enhanced sludge dewaterability in a similar manner. Cations may have significant effects on sludge conditioning by neutralisation of the negative surface charges, bridging of the floc components and salting out effect, leading to improved dewaterability when used in conjunction with chitosan. 2014 Conference Paper http://hdl.handle.net/20.500.11937/23013 Singapore International Water Week - Water Convention restricted |
| 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/20.500.11937/23013 |