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Tersus Receives Patent from U.S. Patent Office

WAKE FOREST, NORTH CAROLINA, USA (November 8, 2022) -Tersus Environmental today announced that the U.S. Patent and Trademark Office has issued patent 11,491,522 (the ‘522 patent) which further strengthens the company’s intellectual property coverage for the diverse selection of products and technologies addressing the remediation of contaminated soils and aquifers..  Authors for the newly issued patent include Sangho Bang, Ph.D.; David F. Alden, P.E.; Gary M. Birk, P.E.; .Jeffrey H. Harwell, Ph.D.; and Bor Jier Shiau, Ph.D.


Tersus Receives New Patent from U.S. Patent Office

WAKE FOREST, NORTH CAROLINA, USA (September 21, 2021) –The United States Patent Office has issued patent US 11,123,779 B2, Method and a Chemical Composition for Accelerated In Situ Biochemical Remediation, Alden et al. on September 21, 2021.  Authors for the newly issued patent include David F. Alden, P.E.; Gary M. Birk, P.E.; Sangho Bang, Ph.D.; Jeffrey H. Harwell, Ph.D.; and Bor Jier Shiau, Ph.D.


Tersus Celebrates 10th Anniversary

Tersus is extremely proud to be marking our 10th anniversary with the support our dedicated associates, collaborative partnership,and loyal clients.  It is quite the accomplishment for the company to reach the 10-year milestone given that the Bureau of Labor Statistics’ Business Employment Dynamics data indicates that less than ⅓ of all small businesses make it to the 10-year mark.  


Featured Remediation Approach

Tersus Advanced Surface Kinetics (TASK™) liberates NAPL and captures them with enhanced recovery techniques.


Do I have DNAPL at my site?

It is difficult to verify the presence of DNAPL through direct observation.   A common practice is to estimate the presence of DNAPLs indirectly by applying the “1 percent of solubility” rule-of-thumb (EPA, 1992). 


Optimizing Anaerobic Bioremediation

Nutrimens® Granular, Enhancing the Efficiency of Electron Donor Utilization in Bioremediation

Bacteria are very sensitive to low pH. The optimal pH for bioremediation is between 6 and 8.5. To keep your in situ bioremediation project on track, pH should be maintained within a range where bioremediation is maximized. In general, more fermentation means more volatile fatty acid (VFA) production and lower pH. A major consequence when pH falls below 6 is a dramatic decline in enhanced reductive dechlorination.