The Preferred Choice for Petroleum Remediation

Subsurface Metabolic Enhancement (SME, pat. 6,464,005) is used for underground bio-removal of hydrocarbon contamination. SME is a method of cultivating native organisms in place that consume hydrocarbon contamination, converting the hydrocarbons into non-toxic water and carbon dioxide. SME is a natural method of remediation and utilizes microorganisms found in the soil to eat contamination.

Our delivery system introduces a patented formula of oxygen and nutrients into the soil that stimulates microbes to use hydrocarbon contaminants as a source of energy. As they eat the pollution, the microbes give off carbon dioxide, which is subsequently drawn out of the ground. The ground surface is sealed to insure that the air exchanged stays in the subsurface.

SME remediates LNAPLs and DNAPLs, including the following petroleum-based contaminants:

  • Gasoline Range Organics
  • Diesel Range Organics
  • Benzene
  • Toluene
  • Ethylbenzene
  • Naphthalene
  • MtBE
  • Many others

Benefits and Features of SME

One of the best benefits our system provides is a low profile. The SME system can be operated with minimal to no interruption to normal business operations. This bioremediation method provides a cost effective system of removing contamination. It even excels in crowded, confined or other difficult situations, while still allowing the business to continue operation during remediation. The non-toxic and minimal disturbance of SME makes it the preferred choice for petroleum remediation. Other advantages of our innovative SME technology include:

SME Features – Overview

SME is a patented process for in situ bioremediation of petroleum and other hydrocarbon contamination in soil and groundwater. The patented process of SME offers remediation that is unique and more effective than any other biosparging or bioventing process.

In-Situ Process
Soil and groundwater treatment are completed on site, eliminating the need to excavate, pump, or transport contaminated material to another location. Uses natural microorganisms found natively in the soil.

Installs around existing facility
Installations are generally completed within one week. The SME installation and operation takes placed without interrupting normal business operations. After the installation is complete there are no obvious signs to clientele of the cleanup operation.

Contaminant Plume Elimination
The metabolic cleansing process insures that contaminant plumes are fully degraded both above and below ground.

Owner Friendly
Extremely low profile operation with minimal intrusion into landowner use of property. Business may continue to operate as normal during installation and operation.

Cost Effective
Costs are typically 30% to 40% less than traditional methods. No additional costs or risks are incurred in obtaining permits or insurance to cover the transportation, storage, dumping or off-site treatment of contaminants or harmful by-products.

Future Access and Monitoring
After the remediation is complete, the system can then be converted into an immediate response unit for the detection of future leaks.

Speed of Project Completion
SME uses aerobic processes to degrade the contaminants, resulting in clean-up times that are exponentially faster than any anaerobic process. Clean up timelines are usually achieved in a 6-24 month period.

Clean with Green
SME is a completely natural and environmentally friendly way to remediate contamination, using existing resident microbes and organic nutrients to enhance the subsurface. No other materials are used and the only end products of the process are carbon dioxide and water.

Depth and Range
Unlike other bio-processes, SME is able to aerate and remediate the deepest levels of aquifers, where the heavier contaminants tend to lie. SME also allows full site remediation, partial remediation, and even spot remediation.

Verifiable Results
100% track record. SME has been implemented on 19 sites and has been awarded 19 NFA letters from the relevant government authority.

Hydrocarbon Process

Air is injected below the groundwater surface through carefully-placed biosparge wells. The air injection is done in low volume and low pressure to insure that as much oxygen as possible will dissolve in the water or soil system. This process is termed biosparging, and serves to change the subsurface environment to an anaerobic system. In order to aerate the subsurface environment, a network of small diameter biosparge wells is placed near the bottom of the contamination plume. Biosparge wells are often emplaced with push-probe technology.

Carbon dioxide, the waste product of the SME system, is collected in vadose zone through a biogenic gas extraction (BGE) system and exhausted to the atmosphere. The BGE system operates at a low pressure and only serves to remove carbon dioxide, not hydrocarbon vapors from the subsurface.

Controlled quantities of nutrients are injected into the system to provide microorganisms the necessary growth nutrients to build a stable and efficient bioremediation community. Nutrients are added to the subsurface with co-located wells in the biosparge network, discharging the nutrients into the biologically active portion of the contaminated material. The process of air and nutrient injection and waste extraction continues until the subsurface environment has been successfully remediated.