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
- Oxygen release for aerobic bioremediation of BTEX and MTBE
- Hydrogen release for anaerobic reductive dechlorination of solvents
- Introduction of dissolved SF6, argon, etc. for use as tracers
- Release of CO2 for pH adjustment
- Light alkane release to promote co-metabolic biodegradation of MTBE
- Plume migration barrier, primary remediation device, or polishing
Advantages
- Low cost
- Steady release for constant microbial activity
- Easy installation and removal
- Minimal maintenance and operating effort
- No amendment loss due to ‘bubbling’
- No hazardous substances introduced or produced
- No slurry to mix, handle or inject
- No electricity required
