EDS-ER

Water Soluble Oils for Enhanced Anaerobic Bioremediation

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 live in excess of two years. Unlike water-based EVO products, EDSER 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 live and freeze thaw issues, Tersus Environmental has developed an electron donor family of water-soluble oils.

Product

EDS-ER is a long lasting water-soluble oil formulated with >92% natural seed oils. EDS-ER is provided as water mixable oil, not a waterbased oil, as is the current convention. There is no water within the formulation. The cost for shipping the electron donor to the project site is reduced by as much as 50%.

Purpose

EDS-ER is a simple, safe, low-cost solution for the bioremediation of halogenated compounds (e.g., PCE, TCE, DCE, VC, TCA, CT, etc.), perchlorate, explosives such as aromatic nitrates, energetic munitions residuals, nitrates, acids, radionuclides, select oxidized heavy metals, and other contaminants.

Benefits

• 100% fermentable – contains no water
• Completely water mixable which minimizes the number of injection points for low permeability structures, reducing overall capital costs
• Easily mixes with water for economical application
• Controlled release of electron donors for up to five years
• Food-grade carbon
• Low total dissolved solids to comply with secondary water quality requirements for amendments with low salt content
• Conforms to EPA's EPP (Environmentally Preferable Purchasing) and USDA biobased criteria
• No Operations and Maintenance
• Clean, low-cost, non-disruptive application (e.g., direct-push, wells and excavations)
• Green sustainable chemistry, made from renewable crop-based oils
• Low cost transportation when compared to other electron donors
• Long shelf life - shelf life unrefrigerated > 2 years
• No freeze thaw issues

Configuration

EDS-ER applications are easily configured and tailored to meet site-specific conditions. Configurations include applications in grids, barriers and excavations. Because of its low viscosity, EDS-ER can be applied to the subsurface with direct-push injection, hollowstem auger, existing wells or re-injection wells.

Offers Cost Savings

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

Longevity

A single EDS-ER application provides a controlled release of electron donors for periods of up to 3 to 5 years, under optimal conditions.

Field Applications

Because of its low viscosity and longevity, EDSER is an ideal substrate for injection using direct-push technology for source area, plume and reactive barrier applications. The low viscosity allows a greater volume of EDS-ER to be applied in a shorter period and increases the substrate delivery radius per point. The result is fewer injection points and overall shorter delivery time requirements per site. EDS-ER is also ideal for injection into the subsurface through injection wells or used in soil mixing and excavation projects.

Product Specifications

EDS-ER Oil Content >92%
Emulsifiers Balance
Neutral pH
Shelf Life Unrefrigerated > 2 years

Packaging Options

55-gallon poly drums
275-gallon IBC containers
3,000 - 5,000 gallon tankers

Convergence of Gas inFusion

Technology & In Situ Remediation Technologies The treatment of contaminants with EDS-ER is further enhanced with the addition hydrogenenriched water, cometabolic gas enriched water, or carbon dioxide (CO2) supersaturated water. The addition of hydrogen-enriched water may reduce electron donor demand over the life of the project by as much as 50% thereby more than offsetting the cost of the gas inFusion technology and its application. The dissolved gas enriched water is added to EDS-ER as a dilution fluid, used as chase water, recirculation water, or a precondition waters for bioaugmentation culture.