IN-SITU REMEDIATION SERVICES: Aerobic Bioremediation

Enhancing natural, organic processes to affect green remediation.

Experience

One of Canada’s most experienced firms in the design and implementation of In-Situ Bioremediation, we have conducted Aerobic Bioremediation programs in a variety of geologic settings.

Approach

An effective method for degrading BTEX, petroleum hydrocarbons such as gasoline or fuel oil, or MtBE, in soil and groundwater, enhanced aerobic bioremediation (or “oxidative bioremediation”) creates conditions in which naturally occurring or injected micro-organisms, such as bacteria or fungi, in the presence of sufficient oxygen, will feed on contaminants, breaking them down into less-toxic compounds and harmless by-products.

IRSL In-Situ Remediation Services - Aerobic Bioremediation Trench

Geology Addressed

  • Alluvial Deposits
  • Fill Materials
  • Fluvial Deposits
  • Fractured Carbonate Rock
  • Fractured Igneous Rock
  • Fractured Shale
  • Glacial Till

Compounds Delivered

  • Biosparging
  • Hydrogen Peroxide Nitrate
  • Oxygen Releasing Devices (Emitters and iSOC)
  • Oxygen Releasing Materials
  • Ozone

Contaminates Mitigated

  • Aromatic Volatile Organic Compounds
  • Nutrients
  • Oxygenates such as MtBE
  • Petroleum Hydrocarbons
  • Polycyclic Aromatic Hydrocarbons
  • Vinyl Chloride

Considerations

  • Successful aerobic bioremediation efforts must incorporate all of the necessary components: an abundant supply of electron donors, nutrients for building cell mass, active cultures to spur on microbial growth, and enzyme enhancements to increase bioavailabilty.
  • Very high concentrations of contaminants can negatively affect the micro-organisms before they can accomplish their work. At high contaminant concentrations, an integrated approach is often required. First, another remedial option, such as chemical oxidation or physical removal, will be used to reduce contaminant concentrations. When contaminant concentrations are sufficiently reduced, bioremediation will be used to complete contaminant breakdown.
  • Aerobic bioremediation is a very effective approach to address petroleum hydrocarbons, yet is often of limited effectiveness when addressing chlorinated hydrocarbons such as PCE and TCE.
IRSL In-Situ Remediation Services - Aerobic Bioremediation

Details

With sufficient oxygen (aerobic conditions) and other nutrients, microorganisms will use many organic contaminants as a food source, effectively breaking them down into carbon dioxide, water, and microbial cell mass.

For aerobic bioremediation, oxygen is the main electron acceptor; methods that oxygen can be delivered include:

  • Oxygen releasing devices.
  • Oxygen releasing compounds.
  • Biosparging.
  • Bioventing.
  • Air sparging.
  • Ozone.
  • Hydrogen peroxide enhancement.

We work to increase the rate at which the microbes bioremediate the organic contaminants by favourably “enhancing” the conditions through increasing the concentration of electron acceptors and nutrients in groundwater.

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