In addition to chemical oxidation with permanganate as a treatment technology, Carus offers bioremediation products that are designed to stimulate the naturally occurring bacteria in the soil. These products can be used alone or as part of a treatment-train approach for down-gradient plume treatment and polishing. Sulfate BioChem (SBC) supports anaerobic oxidation conditions and delivers oxygen for long-term biological oxidation under anaerobic conditions. OBC+ has advantages by providing soluble sulfates and compounds that help develop and promote the necessary redox conditions to sustain oxidation by sulfate reductions. IXPER® 70 C and IXPER 75C Calcium Peroxides are primarily used to stimulate the natural degradation of petroleum hydrocarbons including BTEX. IXPER is a polishing step and can be injected in a grid pattern or broadcasted at the bottom of an excavation or in trench applications.
Carus Remediation Technologies offers complimentary bioremediation products that can meet the substrate requirements for a variety of bioremediation site design strategies. Customers can now choose between our long-lasting oil-derived CAP 18® and CAP 18 ME® anaerobic bioremediation products that provide a sustained source of hydrogen for 3+ years or, if site goals require a water soluble substrate with the option of combining zero valent iron for chemical reduction, ABC Olé and ABC+ (Anaerobic BioChem+).
CAP 18® and CAP 18 ME® anaerobic bioremediation products provide a long-term hydrogen source and quick hydrogen release for the reductive dechlorination of a variety of contaminants including chlorinated solvents, nitrates, sulfates, perchlorate, and explosives. On a per-pound basis, CAP 18 and CAP 18 ME contribute significantly more hydrogen than soluble products.
Since CAP 18 and CAP 18 ME are unemulsified oil products, the oil has the ability to stay in place where it is injected. This is an excellent option for barrier applications, especially at more challenging sites with high seepage velocity. For those sites that have a lower seepage velocity, the longevity of CAP 18 and CAP 18 ME coupled with the ability of the fatty acids to migrate 60 feet downgradient allows design flexibility. Undesirable and unproductive methane production can also be an issue when using various bioamendments. The C18 fatty acids in CAP 18 and CAP 18 ME are known to inhibit the aceticlastic methanogenesis pathway for methane production with anaerobic bioremediation.