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    Soil aquifer treatment of artificial wastewater under saturated conditions

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    Type
    Article
    Authors
    Essandoh, H. M K
    Tizaoui, Chedly
    Mohamed, Mostafa H A
    Amy, Gary L.
    Brdjanovic, Damir
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Environmental Science and Engineering Program
    Water Desalination and Reuse Research Center (WDRC)
    Date
    2011-06-05
    Online Publication Date
    2011-06-05
    Print Publication Date
    2011-08
    Permanent link to this record
    http://hdl.handle.net/10754/561768
    
    Metadata
    Show full item record
    Abstract
    A 2000 mm long saturated laboratory soil column was used to simulate soil aquifer treatment under saturated conditions to assess the removal of chemical and biochemical oxygen demand (COD and BOD), dissolved organic carbon (DOC), nitrogen and phosphate, using high strength artificial wastewater. The removal rates were determined under a combination of constant hydraulic loading rates (HLR) and variable COD concentrations as well as variable HLR under a constant COD. Within the range of COD concentrations considered (42 mg L-1-135 mg L-1) it was found that at fixed hydraulic loading rate, a decrease in the influent concentrations of dissolved organic carbon (DOC), biochemical oxygen demand (BOD), total nitrogen and phosphate improved their removal efficiencies. At the high COD concentrations applied residence times influenced the redox conditions in the soil column. Long residence times were detrimental to the removal process for COD, BOD and DOC as anoxic processes and sulphate reduction played an important role as electron acceptors. It was found that total COD mass loading within the range of 911 mg d-1-1780 mg d-1 applied as low COD wastewater infiltrated coupled with short residence times would provide better effluent quality than the same mass applied as a COD with higher concentration at long residence times. The opposite was true for organic nitrogen where relatively high concentrations coupled with long residence time gave better removal efficiency. © 2011.
    Citation
    Essandoh, H. M. K., Tizaoui, C., Mohamed, M. H. A., Amy, G., & Brdjanovic, D. (2011). Soil aquifer treatment of artificial wastewater under saturated conditions. Water Research, 45(14), 4211–4226. doi:10.1016/j.watres.2011.05.017
    Sponsors
    The study was carried out with support from The Netherlands Organisation for International Cooperation in Higher Education (Nuffic).
    Publisher
    Elsevier BV
    Journal
    Water Research
    DOI
    10.1016/j.watres.2011.05.017
    PubMed ID
    21700308
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.watres.2011.05.017
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Environmental Science and Engineering Program; Water Desalination and Reuse Research Center (WDRC)

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