Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item

    Rapid start-up of a bioelectrochemical system under alkaline and saline conditions for efficient oxalate removal

    Access Status
    Fulltext not available
    Authors
    Weerasinghe Mohottige, T.
    Ginige, M.
    Kaksonen, A.
    Sarukkalige, Priyantha Ranjan
    Cheng, K.
    Date
    2018
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Weerasinghe Mohottige, T. and Ginige, M. and Kaksonen, A. and Sarukkalige, P.R. and Cheng, K. 2018. Rapid start-up of a bioelectrochemical system under alkaline and saline conditions for efficient oxalate removal. Bioresource Technology. 250: pp. 317-327.
    Source Title
    Bioresource Technology
    DOI
    10.1016/j.biortech.2017.11.009
    ISSN
    0960-8524
    School
    School of Civil and Mechanical Engineering (CME)
    URI
    http://hdl.handle.net/20.500.11937/60265
    Collection
    • Curtin Research Publications
    Abstract

    This study examined a new approach for starting up a bioelectrochemical system (BES) for oxalate removal from an alkaline (pH > 12) and saline (NaCl 25 g/L) liquor. An oxalotrophic biofilm pre-grown aerobically onto granular graphite carriers was used directly as both the microbial inoculum and the BES anode. At anode potential of +200 mV (Ag/AgCl) the biofilm readily switched from using oxygen to graphite as sole electron acceptor for oxalate oxidation. BES performance was characterised at various hydraulic retention times (HRTs, 3–24 h), anode potentials (-600 to +200 mV vs. Ag/AgCl) and influent oxalate (25 mM) to acetate (0–30 mM) ratios. Maximum current density recorded was 363 A/m 3 at 3 h HRT with a high coulombic efficiency (CE) of 70%. The biofilm could concurrently degrade acetate and oxalate (CE 80%) without apparent preference towards acetate. Pyro-sequencing analysis revealed that known oxalate degraders Oxalobacteraceae became abundant signifying their role in this novel bioprocess.

    Related items

    Showing items related by title, author, creator and subject.

    • The mechanisms of action of sodium oxalate seed stabiliser molecules under Bayer conditions.
      Sipos, Gabriella (2001)
      Sodium oxalate is one of the many organics present in Bayer liquor. Due to its limited solubility, sodium oxalate can co-precipitate with alumina trihydrate during precipitation. This can have detrimental effects on the ...
    • Kinetics of oxalate degradation in aerated packed-bed biofilm reactors under nitrogen supplemented and deficient conditions
      Weerasinghe Mohottige, T.; Kaksonen, A.; Cheng, K.; Sarukkalige, Priyantha Ranjan; Ginige, M. (2019)
      © 2018 Elsevier Ltd Destruction of oxalate from alumina-refining process liquor is considered essential for many alumina refineries around the world. Some refineries have embraced the use of aerobic bioreactors as a ...
    • Oxalate degradation by alkaliphilic biofilms acclimatised to nitrogen-supplemented and nitrogen-deficient conditions
      Weerasinghe Mohottige, T.; Cheng, K.; Kaksonen, A.; Sarukkalige, Priyantha Ranjan; Ginige, M. (2018)
      Background: Sodium oxalate is a key organic contaminant in alumina industry, which diminishes process yields and product quality. Given that Bayer process liquor is typically deficient in nitrogen (N), there is external ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.