703 Waterloo Emitter for Enhanced Bioremediation

The Model 703 Waterloo Emitter™ is an inexpensive, simple device which is designed to assist in-situ remedial biodegradation of MTBE, BTEX and other contaminants. It allows the uniform and controlled release of oxygen, or other bioenhancing amendments, which encourages and sustains the growth of microorganisms required for in-situ bioremediation of contaminated groundwater.

With use of the patented technology, a steady, direct diffusion of oxygen into an aquifer through pressurized silicone or LDPE tubing is enabled. This continuous stream of oxygen into the tubing creates the ideal concentration gradient driving this passive system, without ‘bubbling off’ excess oxygen.

The PVC frame is wrapped with tubing which can be pressurized to obtain the desired diffusive transfer of gas, appropriate to site specific needs. To allow the controlled continuous diffusion of gas into the plume, the units can be stacked in a well and joined from one well to another. They are sized for 50, 100 and 150mm (2”, 4” and 6”) wells.

Advantages

  • Low cost
  • No electricity required
  • Steady release for constant microbial activity
  • Easy installation and removal
  • Minimal maintenance and operating effort
  • No amendment loss due to ‘bubbling’
  • No slurry to mix, handle or inject
  • No hazardous substances introduced or produced

Applications

  • Oxygen release for aerobic bioremediation of BTEX and MTBE
  • Light alkane release to promote co-metabolic biodegradation of MTBE
  • Hydrogen release for anaerobic reductive dechlorination of solvents
  • Release of CO2 for pH adjustment
  • Light alkane release to promote co-metabolic biodegradation of MTBE
  • Introduction of dissolved SF6, argon, etc. for use as tracers
  • Plume migration barrier, primary remediation device, or polishing
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