Recovery Well Rehabilitation

Recovery wells are often fouled with microorganisms, hydrocarbons, and iron deposits. Often these “biomasses” foul the pump intakes, screens, pump packing, and the formation near the pump intake. Remediation Services has developed a unique process utilizing chlorine dioxide and specialty cleaners to clean and disinfect these wells.

RSC has introduced a unique form of chlorine dioxide where the biocide is generated
in situ in the casing of the well. A pelletized chemical product is dropped in the well. As the chemical dissolves chlorine dioxide is generated. This becomes a convenient and safe method of applying one the most effective industrial disinfectants. The chlorine dioxide is then surged to disinfect the screens, packing and formation.

Chlorine dioxide has the ability to penetrate hydrocarbons and biomass and to loosen and disinfect hydrocarbon and biological deposits. When the biomass is combined with iron deposits the chlorine dioxide can be followed with iron solubilizing treatment. Chlorine dioxide provides a useful new tool for groundwater remediaters who must rehab recovery wells. It features make it more effective than standard rehabilitation treatment because:

  1. Chlorine dioxide penetrates biomass and hydrocarbons
  2. Chlorine dioxide is an extremely effective disinfectant
  3. Chlorine dioxide does not form chlorinated byproducts
  4. Chlorine dioxide can be combined with iron solublizing treatment to remove iron/biomass deposits.
  5. Chlorine dioxide is less corrosive than chlorine or hypochlorite treatments.

The process can be effectively used on recovery wells as well as sparge and SVE wells which have biomass or biomass/iron or biomass/hydrocarbon fouling.