Emulsified Vegetable Oil

Featured Visual: Representative visual for electron-donor chemistry used in enhanced bioremediation.

Overview

Hepure is a key distributor of EVO to the environmental industry for contaminated site remediation. In addition to EVO, we can supply sodium lactate and a Dehalococcoides microbial culture. EVO is provided in 55 gallon drums and 265 gallon totes or tanker, typically as a 60% solution or pre-diluted ready for use by request. Hepure has distribution facilities nationwide to minimize trucking cost and lead time.

How EVO Works

The anaerobic bioremediation process uses native or introduced microorganisms (Dehalococcoides) to degrade chlorinated solvents such as PCE and TCE to innocuous end products including ethene and ethane. EVO provides both a slow-release carbon source (vegetable oil) and a fast-release carbon source (lactate) to sustain microbial activity over extended periods.

Product Selection

Let our product support specialist help you decide which bioremediation approach is right for your site or how to best integrate biological with chemical approaches. Hepure has the experience to determine the best approach based on project site characteristics. Our bioremediation and bioaugmentation solutions can seamlessly take the remediation transition from chemical to biological.

EVO for Mine Water and Seepage Treatment

The slow-release carbon that drives anaerobic bioremediation of solvents also feeds the bacteria that treat mine-impacted water. Under anaerobic conditions, microbes using EVO as their electron donor reduce nitrate, then selenate, then sulfate, and the sulfide they make from sulfate precipitates dissolved metals such as zinc, copper, and cadmium.

Research backs the approach. Emulsified soybean oil enhanced sulfate reduction in column studies treating acid mine drainage, despite low pH and toxic metals, and the U.S. Department of Energy’s Savannah River National Laboratory developed vegetable oils as long-term electron donors for seepage, surface water, and groundwater carrying sulfate, nitrate, and redox-sensitive metals.

Where EVO Fits

In situ treatment of mine-impacted groundwater and seepage, injection into backfilled or flooded workings, and passive systems where a slow, steady release beats a daily chemical feed. Large active bioreactors usually run on cheaper soluble donors such as methanol, ethanol, or molasses; EVO’s advantage is longevity, months to years from a single application. Pair it with sodium lactate for a faster start. More on the chemistry: selenium, sulfate, and nitrate.

Supplying EVO

We ship EVO in 55-gallon drums, 265-gallon totes, or by tanker, typically as a 60% solution or pre-diluted by request, from distribution facilities nationwide. Small and large droplet formulations are available. See all Hepure water treatment chemicals.