Aerobic cometabolism of TCE may be limited by the potential microbial toxicity of by products or by product metabolic repression. An independent comparison of induced cometabolism using soluble methane and CL-Out bioaugmentation showed that CL-Out bioaugmentation removed more TCE. The TCE removal rate by CL-Out when supplemented with an oxygen source was a steady rate that continued past apparent limits of induced cometabolism. The significant difference may be in that the population of beneficial microbes that can be added is much higher than the population level that may be achieved through biostimulation. For a brief summary of the study follow this link Overcoming TCE Metabolic Limits.
Petrox bioremediation is used to remove petroleum contamination from soil and water under many different conditions. From surface spills to deep soil and ground water contamination, Petrox has successfully removed the contamination and environmental risk. This summary of case studies demonstrates the applicability of Petrox bioremediation to the full range and life cycle of petroleum spills. Click here to view the document.
When a source of ground water contamination or contaminant vapors is present under a building, efforts to mitigate the spread of contamination may continue indefinitely with mounting costs. Bioremediation may be used to remove the source of vapors or ground water contamination without damage to the building or interrupting operations.
There are many examples of this approach in the case studies on this site. You can call us to find whether this approach is applicable to your site and the potential cost savings.
Cl Solutions provides special microbial blends for the bioremediation of different contaminant types. However, the advantage of the Pseudomonas sp. in our products is that they have multiple metabolic capabilities, which means for example that a blend optimized for cometabolism of chlorinated solvents can also be effective in petroleum removal.
A recent study by a user of our products showed that the CL Solutions’ patented approach for 1,4-dioxane bioremediation can also degrade a range of chlorinated volatile organic compounds (CVOCs).
Other examples of the successful treatment of mixed plumes are:
Petrox removal of petroleum compounds and trace levels of chlorinated solvents.
Petrox cometabolism of MTBE using petroleum components as a substrate and removing them simultaneously.
CL-Out simultaneous removal of nitrates and perchlorate.
Feel free to check out the case studies or call us for more information.
Underground storage tank (UST) leaks from a former gas station contaminated shallow ground water under a parking lot for a commercial building. The UST contamination was found during trenching for utilities. As the presence of contamination prevented further property development, fast remediation was important to the stakeholders.
The size of ground water plume that resulted from leaching soil contaminants was estimated to be 5,000 square feet. The contamination was mainly diesel-range petroleum constituents, with the highest concentrations in the aliphatic range, but there were also scattered detections of xylene, toluene, and ethylbenzene.
Petrox bioremediation was implemented in the ground water. Three units of Petrox (165 gallons) were injected into the contaminated ground water through vertical injection wells located up gradient of the monitoring wells.
After a single inoculation of Petrox, the contaminant concentrations were reduced across the property. The following table shows the overall reduction in both the volatile and semi-volatile range hydrocarbons.