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    Dual-Conditioning of Sludge using Chitosan and Metal Cations

    Access Status
    Fulltext not available
    Authors
    Lau, Shiew Wei
    Tang, S.D.
    Ang, Ming
    Sen, Tushar
    Chua, Han Bing
    Date
    2014
    Type
    Conference Paper
    
    Metadata
    Show full item record
    Citation
    Lau, S.W. and Tang, S.D. and Ang, M. and Sen, T. and Chua, H.B. 2014. Dual-Conditioning of Sludge using Chitosan and Metal Cations, in Singapore International Water Week - Water Convention (ed), Singapore International Water Week - Water Convention 2014, Jun 1-5 2014. Singapore: Singapore International Water Week - Water Convention.
    Source Title
    Water Convention 2014 Conference Proceedings
    Source Conference
    Singapore International Water Week - Water Convention 2014
    School
    Curtin Sarawak
    URI
    http://hdl.handle.net/20.500.11937/23013
    Collection
    • Curtin Research Publications
    Abstract

    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.

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    • Dual-conditioning of Sludge using Chitosan and Metal Cations
      Lau, Shiew Wei; Tang, S.D.; Ang, Ming; Sen, Tushar; Chua, Han Bing (2015)
      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 ...
    • Dewaterability of Anaerobic Digested Sludge with Cations and Chitosan as Dual Conditioners
      Lau, Shiew Wei; Chong, Siew; Ang, Ming; Sen, Tushar; Chua, Han Bing (2013)
      Anaerobic digested sludge dewatering is very important in sludge management and disposal. In this study, flocculation and dewatering behaviour of anaerobic digested sludge were investigated using metal cations (sodium, ...
    • Assessment of Chitosan Conditioning in a Synthetic Anaerobic Digested Sludge System
      Lau, Shiew Wei; Ang, Ming; Sen, Tushar; Chua, Han Bing (2014)
      Effects of dosage and pH in chitosan conditioning were investigated for studying the anaerobic digested sludge dewatering characteristics using a modified synthetic sludge system. A comparison was made with the conditioning ...
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