Electron Donor Solution - Extended Release (EDS-ERâ„¢)
EDS-ER is the next evolution in enhanced bioremediation. EDS-ER is a patent pending long lasting water-soluble oil, designed to release bio-available hydrogen over a period of 3 to 5 years. With a neutral pH it 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.
What is EDS-ER?
The product
EDS-ER is a long lasting soy based water mixable oil, not an oil-in-water emulsion, 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%. The benefit to you and your client is that we offer a lower cost solution to help you close the site.
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.
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, hollow-stem auger, existing wells or re-injection wells.
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
Offers Cost Savings
The 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.
Applications
Because of its low viscosity and longevity, EDS-ER 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.
Gas inFusion & In-situ Remediation
Adding hydrogen-enriched water can enhance the performance Tersus' EDS-ER and other electron donor substrates. Infusing hydrogen into water with the inVentures HiSOC or gPRO technology can reduce the demand for the carbon-based electron donor by as much as 50%. Simply add the hydrogen-infused water to EDS-ER for dilution, pre-conditioning, recirculation or chase water. Further, you can inject the hydrogen-enriched water with your bioaugmentation cultures.