Accell® for Environmental Remediation

Bioremediation applications are a natural extension of Protein Surfactant Complex™ (PSC™) technology with our unique BioRemediation Accelerator, Accell® SBR. Bioremediation of either soil or water can be accomplished at lower cost, with simpler techniques and non-toxic ingredients. From tank leakages to pipeline ruptures, Accell® SBR provides relatively simple, fast and cost effective solutions for mitigating the environmental effects of oil and chemical spills.

A major benefit of Accell® SBR is that it facilitates the use of on-site remediation by eliminating the need to haul the waste. Major cost reductions can be realized in the following areas: transportation, liability, dumping fees and HAZMAT fees, along with reduced times needed for bioremediation.

NOTE: Accell® SBR does not contain any bacteria, living cells, or active enzymes. Its ingredients are non-toxic and have no negative environmental impact.
contaminated soil from storage tank oil spill
Contaminated soil from storage tank oil spill
Accell® SBR enhances the growth and metabolism of the indigenous heterotrophic bacteria that are responsible for effective biodegradation of petroleum-contaminated soil. This action results in faster, more complete remediation of oil contaminated soils when compared to conventional treatments, such as adding engineered bacteria strains.
With proper treatment protocols, Accell® SBR has been proven to be able to: (a) enhance the growth of the soil and water microflora, (b) enhance the uptake and digestion/bio-oxidation, or breakdown, of petroleum and other organic chemicals at highly accelerated rates compared to the untreated microbial community. This provides a double boost to the bioremediation process compared to conventional techniques.

BENCH TEST RESULTS: Soil from a contaminated oil production site was tested with Accell® SBR. Bacterial proliferation was measured to prove that Accell® increases the growth of resident bacteria populations when nutrient levels, in this case the oil, are in adequate supply to support the accelerated growth rates. No bacteria inoculant was used in the study. The higher bacteria levels, coupled with the accelerated uptake and subsequent breakdown of the oil, illustrate the significant reduction in time that would be needed to remediate a site.
chart showing Accell products' effectiveness in remediation of petroleum oil-contaminated soil and sludge
Petroleum Oil Contaminated Soil & Sludge Bio-Remediation
Bench Study: 7% Crude oil in soil
Accell at 1/16 dilution, regular watering to 11%
In a typical soil remediation site, the level of contaminants can decrease without any treatment in the early stages after a spill. This is due to both evaporation and the action of resident bacteria populations. The contaminants that show this "natural" decrease are typically the volatile and easy to digest, low molecular weight, organic contaminants. Adding a bacterial inoculant, BIN, which is a conventional remediation approach, might accelerate the biodegradation rate, but results showed only a nominal reduction in the current test, from 15% to 18%.

ACCELL® ADVANTAGE: Accell® SBR, with no inoculant added, and that relied on resident bacteria populations, reduced the Total Petroleum Hydrocarbons by 24%. This equates to an increased rate of biodegradation of 200% (3 times) compared to bacteria alone, using water control as a basis.

In some instances, resident bacteria populations may be too low to provide adequate bioremediation. Accell® SBR can boost the performance of such inoculants and enhance remediation effectiveness, in applications where engineered bacteria are added in order to enhance bioremediation.

The accelerated biodegradation rates when using Accell® SBR opens up possibilities for on-site bioremediation to reduce costs by simplifying the process and reducing the time it takes to bring a site into compliance with regulatory requirements.
chart showing Accell® SBR effectiveness in contaminated soil remediation
Bench test: % TPH in soil samples collected at a Canadian oil field, after 20 days remediation.
BIN, a commercial, proprietary, bacterial remediation inoculant added for comparison
Perchlorate BioRemediation
Ground water in a major industrial site had been heavily contaminated with perchlorate (around 5000 ppb) for several years, which necessitated the shutdown of local water wells.

For remediation, ground water was pumped out and treated in a gravel bed, anoxic tank using citric acid as a source of carbon for bacterial proliferation. Nitrate was present in excess (11000 ppm), which complicated the removal of perchlorate.

Results are provided for a pilot test that used two identical columns filled with gravel. Ground water was pumped through these columns, and perchlorate was measured daily. Citric acid solution was applied at a dose rate of 23 ppm. Accell® was applied at a dose rate of 6 ppm, together with the citric acid solution.
chart showing Accell products' effectiveness in perchlorate bioremediation
Results after one week of Accell® BioRemediation Accelerator treatment