EDS-ER (electron donor solution – extended release) by Tersus Environmental is a 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. The video shows how easily EDS-ER mixes with water. Many regulators have called our technology the “Greenest” emulsified vegetable oil (EVO) product on the market.

Unlike many emulsified vegetable oil (EVO) products, EDS-ER has a neutral pH when mixed with water and contains no preservatives. The benefit to you and your client is that you do not have to adjust the pH in the field and our formulation does not inhibit microbial growth.   EDS-ER also has a lower viscosity than EVO products making it easier for you to inject, reducing your field time. 

Over the last few years bioremediation practitioners have embraced the use of vegetable oil, which ferments and produces hydrogen, to support reductive dechlorination. Numerous products are available at various price points and they have varying amounts of fermentable products. EDS-ER contains no water (reduced shipping costs) and is 100% fermentable.  The following table can help you compare EDS-ER to other EVO products. Hydrogen is what counts in enhanced reductive dechlorination projects. When compared to other EVO products, you have to buy less EDS-ER to get the same amount of hydrogen.

Soybean Oil Based
Electron Donor

Pounds of Hydrogen per Pound of Product

Equivalent Pounds for a Pound of

EDS-ER

EDS-ER (100% fermentable water mixable oil)

0.35

1.0

EVO (45% soybean oil emulsion)

0.16

2.1

EVO (50% soybean oil enulsion)

0.18

1.9

EVO (55% soybean oil emulsion)

0.21

1.6

EVO (60% soybean oil emulsion)

0.22

1.6

Hydrogen is what counts in enhanced reductive dechlorination projects. When compared to other EVO products, the benefit to you is that you have to buy less EDS-ER to get the same amount of hydrogen thereby receiving up to a 50% savings in freight alone. As an example, you would need to buy 1.61 times more product if you purchased a 60% oil content EVO to equal the amount of our EDS-ER product.

EDS-ER Features & Benefits