Chlorinated Solvent remediation

Complete chlorinated solvent destruction with ETEC’s anaerobic bioremediation solution.

Natural attenuation may never complete.

Microbes living in the subsurface can naturally degrade chlorinated solvents. That degradation process, called reductive dechlorination, is a kind of anaerobic bioremediation.

On its own, reductive dechlorination typically takes decades to complete. Or the process may stop, leaving behind hazardous daughter products (called a "stall").

Meanwhile, the plume can migrate offsite, sink deeper, or move under structures, causing increased monitoring costs. The changing plume can dramatically impact human health and the environment.

Fast, complete remediation

Reduce treatment time and degrade compounds completely

Remediate faster and avoid stalling with ETEC's anaerobic bioremediation solution. It's a complete solution that optimizes conditions in the subsurface. It works in three ways:

  • Provide a carbohydrate substrate (an electron donor)
  • Ensure adequate nutrients to build microbial mass
  • Circulate treatment water through the plume to ensure constant amendment exposure
Graph of chlorinated solvent concentrations. Description in caption.
The graph depicts data from a project site. It shows chlorinated solvent concentrations spike and then decrease, without generating persistent daughter products.


Carbohydrates and nutrients

Most subsurface environments are not very reductive, so remediation happens slowly. They also lack nutrients and electron donors. As a result, the environment must be optimized to maximize contaminant degradation.

ETEC's CarBstrate™ includes B vitamins, nutrients (nitrogen and phosphorus), and trace minerals. These constituents are essential to ensure an active microbial population.

CarBstrate™ also includes an easily-degradable carbohydrate source that will support a reductive anaerobic environment.

As a result, CarBstrate™ creates conditions that completely dechlorinate contaminants and their daughter products.

Technical details:

  • Shipped in 50 lb bags
  • Dry powder
  • 100% soluble
  • Non-hazardous
A 50-pound white bag of CarBstrate ready to leave the warehouse.


Microbe-supporting nutrients

At some sites, a different electron donor substrate was already injected but isn't meeting cleanup goals. At others, a particular substrate is necessary for its specific characteristics.

ETEC developed NutriChlor™ to complement any electron donor substrate (for example, lactate or vegetable oils). It provides the vitamins, nutrients, and trace minerals that are essential to ensure microbial activity.

Technical details:

  • Shipped in 50 lb bags
  • Dry powder
  • 100% soluble
  • Non-hazardous
Off-white fine granules of NutriChlor being scooped from a sac.

The ISD™ System

Add amendments and recirculate

There are different ways to deliver amendments to a contaminated area. Choosing the right one depends on many factors, including subsurface geology, plume distribution, contaminant concentration, and available equipment.

ETEC designed the In Situ Delivery™ (ISD™) system to be the best platform for delivering amendments.

It is ideal for sites with high contaminant concentrations or stringent regulatory levels. Or where amendments must travel far from an injection point to hard-to-reach contaminants. And it avoids repeated injection events.

Benefits of ISD™

  • Sustain contact between amendments and dissolved & adsorbed contaminants
  • Maintain ideal concentrations of amendments through constant dosing
  • Reach inaccessible areas by inducing groundwater flow gradients
  • Protect receptors and off-site areas by maintaining hydraulic control

What ISD™ does:

  • Extract groundwater and pump it into a treatment enclosure.
  • Add amendments for optimal reductive dechlorination
  • Return the treatment water to the subsurface
ISD system deployed at a site, consisting of a small metal shed adjoined to a typical red wooden shed.

Are you ready to reach your cleanup goals faster?

Speak with an engineer today.