Schematic showing staged plume remediation using Waterloo Emitters,
monitored by a transect of CMT or Waterloo Multilevel Systems
placed down gradient.
(Click on 1, 2, 3 or A for a larger view)
Installation
If an enhancement gas is to be used for remediation, a small to medium sized gas cylinder can be used. Emitter tubing is selected and pressure is set according to the amount of enhancement gas required. A single gas cylinder can be used to supply multiple Emitters connected in series. Replenishment of the gas inside the Emitter tubing can be accommodated by periodic purging (weekly/bi-weekly), or a needle bleed valve can be used at the end of the system to allow slow, constant replenishment to occur.
Applications
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Oxygen release for aerobic bioremediation of BTEX and MTBE
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Hydrogen release for anaerobic reductive dechlorination of solvents
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Introduction of dissolved SF6, argon, etc. for use as tracers
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Release of CO2 for pH adjustment
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Light alkane release to promote co-metabolic biodegradation of MTBE
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Plume migration barrier, primary remediation device, or polishing
Advantages
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Low cost
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Steady release for constant microbial activity
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Easy installation and removal
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Minimal maintenance and operating effort
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No amendment loss due to ‘bubbling’
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No hazardous substances introduced or produced
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No slurry to mix, handle or inject
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No electricity required
