Tersus Environmental, LLC

Tersus Environmental develops and markets advanced, innovative technologies for the remediation of soil and groundwater. We offer engineered sustainable solutions to help our clients reduce uncertainty, minimize risks, and achieve cost-effective results. 

Our marketing efforts also include providing technical support, training, and business development for technology leaders in the field of in situ soil and groundwater characterization and remediation. We provide global sales management and marketing services for the world class iSOC® Gas inFusion technology by inVentures Technologies.

Tersus Environmental can be a valuable partner to consultants and providers of remediation technologies, as we have intimate knowledge of leading edge technologies, their appropriate applicability and their advantages and limitations. Our customers include national and regional consulting firms and federal and state governments.

Download the Products and Contaminants Treatment Matrix


New Technology - NutriBind™



Bioremediation Products:



Electron Donor Solution - Extended Release (EDS-ER™)

It is time to upgrade your emulsified vegetable oil (EVO) to EDS-ER, the next evolution in enhanced bioremediation. EDS-ER (electron donor solution – extended release) is a patent pending long lasting water-soluble oil, designed to release bio-available hydrogen over a period of 3 to 5 years. EDS-ER with a neutral pH has an expected shelf life in excess of two years. Unlike water-based EVO products, EDS-ER is not affected by freezing temperatures.

Vegetable oils are hydrophobic and tend not to dissolve in or mix with water. To improve the distribution, some suppliers of electron donors add emulsifiers to the oil and mix the solution with water. The electron donor is packaged as an oil-in-water emulsion containing 25 to 50% water. As these EVO products are commonly sold on a $/lb basis, the buyer is purchasing water. To address sustainability concerns of shipping water to project sites, short shelf life and freeze thaw issues, Tersus Environmental has developed an electron donor family of water-soluble oils. 

Electron Donors


Electron Donor Solution - Quick Release (EDS-QR™)

Fast-Acting Soluble Substrate -To complement our Gas inFusion technologies, Tersus Environmental is proud to introduce EDS-QR (electron donor solution – quick release), a fast-acting, completely soluble amendment formulated with >98% natural seed oils engineered for enhanced reductive dechlorination of chlorinated solvents or any other anaerobically degradable substance. EDS-QR is an ideal choice for projects that are on a fast track. One injection will typically enhance biological activity for 2 to 3 months.



Nutrimens™ is an all-natural fermentation product. Nutrimens™ liquid is produced during the anaerobic fermentation of an unmodified strain of botanical classification Saccharomyces cerevisiae, including products of fermentation, residual yeast cells and yeast fragments, and the media utilized during fermentation.

Nutrimens™ provides reduced carbon and a wide array of beneficial vitamins, minerals, and metabolites to microbes for enhanced bioremediation of contaminated sites. It can be utilized in groundwater remediation efforts using the liquid or granular formulation or in bioreactors and constructed wetland treatment systems to improve remediation of effluents and surface waters for various metals. Nutrimens™ increases removal rates of many priority pollutants and aids in maintaining circumneutral pH.

Our Nutrimens™ technology has the potential to offer significant cost savings to the groundwater remediation industry. The passive nature of Nutrimens™ eliminates the large capital and operations/maintenance costs associated with active engineered systems. Nutrimens™ offers a faster and lower cost alternative to drawn out natural attenuation approach.


Nutrisulfate™ - Sulfate Enhanced Bioremediation

Enhanced aerobic bioremediation technologies such as the iSOC® gas inFusion technology or the use of oxygen releasing compounds such as TersOx™ are commonly used to accelerate naturally occurring in situ bioremediation of petroleum hydrocarbons, and fuel oxygenates such as MTBE and TBA, by indigenous microorganisms in the subsurface. However, these indigenous microorganisms do not function well in the high contaminant concentrations of the source area. Moreover, the oxygen technologies have to overcome the anaerobic conditions of the source area and often the presence of iron.Sulfate reduction and methanogenesis is the dominate natural degradation processes at most sites; and therefore, adding oxygen to the anaerobic portion of the plume may be disadvantageous.

Nutrisulfate™ (U.S. Patent No. 7,138,060) stimulates biodegradation by providing a soluble, readily available electron acceptor solution. In the presence of elevated sulfate, anaerobic groundwater bacteria use BTEX, MTBE and other petroleum hydrocarbons for carbon and energy while mineralizing the hydrocarbons to carbon dioxide and water. Sulfate addition enhances natural conditions and reduces the carbon footprint when compared to conventional remediation.

Nutrisulfate™ is a high sulfate metabolic supplement designed to enhance the kinetics and efficiency of microbial systems specifically related to bioremediation of BTEX, MTBE, TBA and other petroleum hydrocarbons. The increase in kinetics and efficiency decreases the remediation time and reduces the amount of substrate / amendment required.

Nutrisulfate Xsect

Emulsified Zero-Valent Iron (eZVI)

eZVI is an emulsion of powdered zero-valent iron, surfactant, vegetable oil, and water specifically designed for the remediation of source zones impacted with halogenated hydrocarbons. eZVI has the unique ability to mix with dense non-aqueous phase liquids (DNAPLs) by capitalizing on the ability of food-grade surfactants, biodegradable vegetable oil, water, and zero-valent iron to form hydrophobic emulsion droplets (micelles) that are miscible with DNAPL material in-situ due to matching physical chemistries. Abiotic reductive dechlorination occurs as the halogenated hydrocarbons in DNAPL diffuse through the outer oil membrane into the interior aqueous phase of the emulsion, which contains zero-valent iron. Encapsulating zero-valent iron with a hydrophobic membrane protects the nano-microscale iron from native groundwater constituents that might otherwise waste the iron's reducing capacity, and thereby reduce the mass of eZVI available to treat target contaminants and overall project costs. In addition to the abiotic reactions provided by the ZVI, the vegetable oil and surfactant components present in eZVI act as a long-term electron donor for enhanced biological reductive dechlorination.



Anaerobic Treatment of Nitrate

While aerobic bacteria use oxygen as their terminal electron acceptor for metabolic activity, denitrifying bacteria use NO2 and NO3 under anaerobic conditions. In the presence of an electron donor such as hydrogen, the net effect is the conversion of nitrate to inert nitrogen gas. Heterotrophic bacteria require organic carbon and hydrogen, while hydrogen-oxidizing denitrifying (HOD) bacteria, which are autotrophic and ubiquitous, require carbon dioxide and hydrogen.

Thus, you can save money by stimulating the HOD bacteria without adding fermentable electron donors. 

Nitrate + Hydrogen + CO2 + HOD Bacteria → Nitrogen Gas + Water 

Hydrogen Coupled Denitrification for Nitrate Remediation


iSOC® Passive Gas Infusion System

Tersus Environmental represents the inVentures Technologies Incorporated line of passive gas infusion technologies. iSOC®, in situ Submerged Oxygen Curtain, is an oxygen delivery technology that when suspended in existing monitoring wells infuses high levels of oxygen into groundwater. The proprietary structured polymer used in iSOC® contains hydrophobic microporous hollow fiber. These fibers provide approximately 7,000 square feet of interface area per cubic feet of fiber for the mass transfer of oxygen into groundwater. Most conventional technologies, however, waste most of their oxygen because the bubbles rise to the top of the groundwater table and escape before they have a chance to dissolve or to be utilized by naturally occurring hydrocarbon degraders.



TersOx™ - Inorganic Peroxygen for Enhanced Aerobic Bioremediation

TersOx™ is a specially formulated calcium peroxide that produces a controlled-release of molecular oxygen designed to assist in the aerobic bioremediation of hydrocarbons in soil and groundwater. TersOx™ stimulates natural degradation of petroleum hydrocarbons such as benzene, toluene, ethylbenzene and xylenes (BTEX). This is not a chemical oxidation product. The high ratio of O2 in TersOx™ (>16.6% by weight) provides a long-term oxygen source for up to 12 months upon hydration under ideal conditions. This sustained release of oxygen stimulates indigenous bacteria, accelerates bioactivity, and promotes increased contaminant removal.




Tersus is the worldwide distributor of the leading surfactant technology, TASK™ (Tersus Advanced Surface Kinetics) and related products, including the patented methods for in situ surfactant and chemical oxidation flushing (US Patent Nos. 6,913,419 and 7,021,863). Our anionic surfactant formulations have the unique ability to selectively desorb and liberate sorbed petroleum hydrocarbons from soil and fractured bedrock surfaces allowing for their improved mass recovery and or improved treatment by other remediation techniques.

Supported by nearly two decades of research and formulation testing at the University of Oklahoma, TASK™ addresses a wide range of applications related to hydrocarbon contamination, including:

In situ soil and groundwater remediationEmergency spill clean-up
Pump & treat enhancement
Groundwater recirculation using EEF equipment
Direct Injection
Ex situ soil washing
Equipment and tank cleaning
Sludge removal
Pipeline cleaning



Combining the Proven Performance of Nutrisulfate® With the Power of the Patented Rembind™ Technology

NutriBind™ technology by Tersus Environmental, in association with Ziltek Pty Ltd., is a technological innovation to address challenges in soil and groundwater in situ remediation. Once injected into the treatment zone, NutriBind™ immediately reduces contamination concentrations (within days) and stimulates biological degradation to accelerate cleanup times and meet remedial objectives. Once in contact with water, the resulting buffered slurry releases sulfate and a wide array of beneficial vitamins, minerals, and metabolites designed to increase the efficiency of electron donor (i.e., hydrocarbon contaminants) utilization.

NutriBind™ has a dual function. It binds contaminants in soil and groundwater, eliminating contaminant mobility and its associated risks. NutriBind’s high surface serves as a matrix for microbial activity that addresses sorbed contaminants through sulfate enhanced bioremediation.

NutriBind Significance of Sulfate


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