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

    Dynamics of nitrate and nitrite in saturated sand filters with enhanced substrate conditions for denitrifying bacteria

    82693.pdf (494.1Kb)
    Access Status
    Open access
    Authors
    Al-Saedi, Rasha
    Smettem, Keith
    Stefanova, Katia
    Siddique, Kadambot HM
    Date
    2021
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Al-Saedi, R. and Smettem, K. and Stefanova, K. and Siddique, K.H.M. 2021. Dynamics of nitrate and nitrite in saturated sand filters with enhanced substrate conditions for denitrifying bacteria. Desalination and Water Treatment. 212: pp. 51-60.
    Source Title
    Desalination and Water Treatment
    DOI
    10.5004/dwt.2021.26623
    ISSN
    1944-3994
    Faculty
    Faculty of Science and Engineering
    School
    School of Molecular and Life Sciences (MLS)
    URI
    http://hdl.handle.net/20.500.11937/82629
    Collection
    • Curtin Research Publications
    Abstract

    Substrate conditions for denitrifying bacteria were enhanced by adding carbon sources to a laboratory-scale sand filter system. Temperature, oxidation–reduction potential, and hydrogen ion concentration were measured through the recirculation of nitrogen-dosed wastewater and carbon sources that were mixed to encourage microbial growth, with denitrifying bacteria identified by standard plate counts. Two different external carbon sources (sucrose and ethanol) were added, with and without activated sludge amendments. Nitrate, nitrite, and chemical oxygen demand (COD) concentrations were monitored relative to an untreated control and a treatment with activated sludge under an initial hydraulic loading rate of 0.508 m3 /m2 d and a hydraulic retention time of 2.5 h. Nitrate decay rates were only significantly enhanced for the ethanol treatment without addition of activated sludge. Nitrite initially accumulated when carbon sources were added, but no accumulation was evident by the end of the experiment after 150 min. COD declined when carbon sources were added, but activated sludge had no effect on the rate at which the COD declined. The increased rate of nitrate removal with the addition of ethanol is of technical interest, as the volume of wastewater treated in a unit volume of filter medium for denitrification doubled with ethanol compared with sucrose at the same concentration.

    Related items

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

    • Solubility and crystal growth of sodium nitrate from mixed alcohol – water solvents
      Rossiter, Angelina Jane (2009)
      Due to the ductile nature of the sodium nitrate crystal which deforms plastically under high levels of strain, most of the crystal growth studies in aqueous solution have focussed on the influence of tensile strain, ...
    • Investigation of the impact of nitrate injection to control sourcing problem in oil reservoir : benefit and side effects on steel materials
      Halim, Amalia Yunita (2011)
      The successful control of reservoir souring by nitrate injection has been well documented in the literature. Recent interest has centred on how nitrate application can increase the corrosion risk in pipelines and metal ...
    • A comprehensive review on rheological studies of sludge from various sections of municipal wastewater treatment plants for enhancement of process performance
      Hong, E.; Yeneneh, A.; Sen, Tushar; Ang, H.; Kayaalp, A. (2018)
      Large quantities of sludge is generated from different sections of a wastewater treatment plant operation. Sludge can be a solid, semisolid or liquid muddy residual material. Understanding the flow behaviour and rheological ...
    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.