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Treatability studies for the onsite biological remediation of soils and leachates results in the successful clean-up of hazardous contaminants

Challenge

SBR Technologies (SBRT) was hired to conduct extensive treatability studies with the purpose of investigating the feasibility of using a Sequencing Batch Reactor (SBR) as a key component in an on-site biological remediation program. The purpose of the program was to treat contaminated soil and hazardous leachates that were present in Utica, New York.

SBR Technologies Solution

SBRT began by taking soil and leachate samples from the site and testing them for biological activity. Plate counts and carbon dioxide evolution from soil respirometers positively verified significant activity of indigenous soil microorganisms. Laboratory scale SBRs were tested by using several operating strategies to test their ability to treat the soil.

Benefits Achieved

The SBRs removed most of the soil and leachate constituents, including various phenols and polynuclear aromatic hydrocarbons (PAHs), while producing “specialized bacteria” resistant to cyanide. The successful outcome of this project saved the client in overall clean-up costs as well as regulatory fines.

Results from specific chemical analyses showed high removal efficiencies of targeted hazardous organics. The outcome of this study was used to develop the Soil Slurry-Sequencing Batch Reactor (SS-SBR).