Comparison of Resistivity and Time Domain Reflectometry Sensors for Assessing Moisture Content in Bioreactor Landfills

    Volume 33, Issue 3 (May 2010)

    ISSN: 0149-6115

    CODEN: GTJOAD

    Published Online: 9 March 2010

    Page Count: 9


    Jonnalagadda, Sreeram
    Dept. of Environmental Engineering Sciences, Univ. of Florida, Gainesville, FL

    Kumar, Dinesh
    Dept. of Environmental Engineering Sciences, Univ. of Florida, Gainesville, FL

    Jain, Pradeep
    Dept. of Environmental Engineering Sciences, Univ. of FloridaInnovative Waste Consulting Services, LLC, GainesvilleGainesville, FLFL

    Gawande, Nitin
    Dept. of Civil and Environmental Engineering, Univ. of Central Florida, Orlando, FL

    Townsend, Timothy G.
    Dept. of Environmental Engineering Sciences, Univ. of Florida, Gainesville, FL

    Reinhart, Debra R.
    Dept. of Civil and Environmental Engineering, Univ. of Central Florida, Orlando, FL

    (Received 8 January 2009; accepted 8 January 2010)

    Abstract

    Instruments that can monitor the in situ moisture content of landfilled waste would be of great benefit to landfill operators, especially those operating their facilities as bioreactor landills (wet landfills). Two instrumentation technologies for measuring in situ moisture content (resistivity sensors and time domain reflectometry (TDR)) in landfills were examined and compared. Resistivity and TDR instruments were installed in close proximity at multiple locations in a leachate recirculation well field at a bioreactor landfill in Florida, and resulting moisture content measurements were assessed. The resistivity instruments were less expensive, easier to install, and found more reliable over time than TDR sensors. Both technologies predicted transient moisture changes in the landfill. The magnitudes of the moisture content values obtained using the two technologies were much higher compared to values estimated using mass balance, suggesting that accurate calibration to field conditions is difficult.


    Paper ID: GTJ102326

    DOI: 10.1520/GTJ102326

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    Title Comparison of Resistivity and Time Domain Reflectometry Sensors for Assessing Moisture Content in Bioreactor Landfills
    Symposium , 0000-00-00
    Committee D34