VeruTEK®’s Surfactant-enhanced product recovery (SEPR™) 

• Surfactant Enhanced Product Recovery (SEPR™) is one of VeruTEK Technologies’ innovative, Green Chemistry-based technologies for remediation of recalcitrant environmental contaminants, including non-aqueous phase liquids (NAPL) associated with gas works coal tar and creosote oil. 

• SEPR combines VeruTEK’s patented, plant-based & biodegradable surfactant and co-solvent mixtures, VeruSOL^®, with low concentrations of peroxide in an injection-and-extraction process that facilitates removal of  free-product and residual NAPL from the subsurface. 

• Injection  & extraction of the SEPR chemistry increases soil porosity around the well as product is removed, progressively widening that well’s radius of influence for further recovery.  As the process approaches completion,  overlap is seen in the chemistry injected & extracted from adjacent wells, and overall recovery diminishes.

• SEPR prepares the site for VeruTEK’s patented Surfactant-enhanced In Situ Chemical Oxidation (S-ISCO™) treatment. S-ISCO  involves injection of higher concentrations of an activated oxidant, typically peroxide, persulfate or a combination of both, along with lower concentrations of VeruSOL, to destroy any remaining residual contamination in place .

• By removing gross contamination, SEPR increases the efficiency & cost-effectiveness of subsequent S-ISCO treatment at sites with heavy NAPL & free-product contamination.

Read a review of the VeruTEK approach to NAPL remediation, including detailed description of the two-step
SEPR/ S-ISCO implementation procedure and case studies highlighting the dual phase approach.  Download NAPL Remediation Technical Paper>>