Bioreactor Landfill Demonstration Project

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Bioreactor Landfill Demonstration Project

• Report to FCSHWM Advisory Board
• September 7, 2001
• Orlando, Florida

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Topics

• Status and Future Schedule
• Construction
• Baseline Data

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Status Report

• Wells Installed
• Permit Challenge Issues have been Resolved
• UF/NRSWA Contract to be Signed on Sep 13
• Sign Contract with the Construction Contractor
  and Begin Work (Oct)
• Monitoring Continues

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Construction

• Researchers oversaw construction of
• injection well field
• installation of instrumentation packs
• Installation of side slope piezometers
• Contractor will carry out primary construction
  project

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Top of Landfill
Cluster Wells

• Notes
• Well piping was 2-inch PVC.
• Shallow wells have 10 ft of slotted pipe.
• Intermediate and deep wells have 20 ft of
  slotted pipe.
• Well depths were adjusted to maximizeslotted
  pipe coverage while meeting criteriastate above.

10 ft
Top of Sand DrainageBlanket
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Thermocouples were placed at the bottom of each
well so temperature measurements can be measured
during routine bioreactor operation.
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Installing a well.
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Additional pipe sections were threaded into place
as the pipe was pushed into the hole. For the
most part, all wells were able to be installed to
the drilled hole depth.
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Research Results
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Moisture, Temperature, and Gas In Situ Sensors

• Moisture Content,
• Temperature
• Gas sampling and Analysis

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In Situ MTG Sensor
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MTG Sensors
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MTG Sensors
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2
3
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Moisture Content

• Measured as a function of resistance across the
  sensor matrix.
• Nearly saturated conditions at depths about 60 ft
  below the surface
• MC of 22 (w/w) at depths of 20 ft.

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Moisture Sensors
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Temperature Sensors

• Directly read from the thermocouples .
• Temperatures found to vary between 32 to 54 oC,
  the optimum range of mesophilic and thermophilic
  anaerobic digestion.
• Trends of increasing temperatures with depths.

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Temperature Sensors
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Gas Composition

• Measured with a portable gas composition detector
• Methane contents as high as 53 (v/v) were
  recorded.
• High methane content observed for higher depths.

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Other Sensors
Time Domain Reflectometry based moisture
sensors The instrumentation for these sensors is
nearly complete. Data collection should start
soon.
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Installation of TDR Probes
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Head on the Liner Measurements

• We continue to monitor sensors installed at Cells
  2 and 3, NRRL and at Tomoka Farms Landfill
• Orange County Landfill small-scale experiment
• Laboratory experiments

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Cell2 - NRRL
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Tomoka Farms Landfill
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Questions