EDS-Advanced™
Catalyzed Reductive Bioremediation Platform
Safety Data (SDS) EDS-ER™ • Safety Data Sheet (SDS) EDS-Activator™ • Safety Data Sheet (SDS) EDS-Substrate Shuttle™
Technical Data Sheet EDS-Advanced™ • Technical Data Sheet Heat-Enhanced Catalyzed Reductive Bioremediation
System Overview
EDS-Advanced™ is an integrated, catalyzed reductive bioremediation platform developed by Tersus Environmental to improve amendment distribution, enhance substrate bioavailability, and mitigate biofouling during anaerobic groundwater remediation.
The system combines emulsified vegetable oil, alcohol-based cosolvents, and a proprietary catalyst to promote controlled fatty acid release and sustained hydrogen generation—key drivers of complete reductive dechlorination of chlorinated solvents.
EDS-Advanced™ is not a single product, but a coordinated treatment approach designed to address common limitations observed with conventional emulsified oil injections.
Technical Basis
Catalyzed Alcoholysis and Fatty Acid Release
Conventional emulsified oils rely on slow, uncontrolled hydrolysis to release fatty acids. In contrast, EDS-Advanced™ leverages alcoholysis reactions catalyzed in situ, accelerating cleavage of triglycerides into fermentable fatty acids.
This controlled reaction pathway:
- Improves early-time electron donor availability
- Reduces excessive oil accumulation near injection points
- Enhances amendment distribution within the treatment zone
The result is a more efficient and predictable bioremediation process.
Addressing Common Challenges in ERD
EDS-Advanced™ was developed to address several recurring challenges observed with traditional ERD applications:
- Poor amendment distribution
- Biofouling and loss of injectivity
- Delayed onset of reducing conditions
- Excessive oil loading near injection points
By combining oil, alcohol, and catalyst within a single treatment framework, EDS-Advanced™ improves reliability and long-term performance.
System Components
EDS-Advanced™ comprises three complementary components, each with a distinct role:
- EDS-ER™ – Extended-Release Electron Donor: Provides a preservative-free, long-term source of fermentable carbon and hydrogen. When mixed with water, EDS-ER™ spontaneously forms a high-quality emulsion for sustained anaerobic treatment.
- EDS-Activator™ – Catalytic Additive: Promotes catalyzed alcoholysis of triglycerides, accelerating fatty acid release and enhancing hydrogen generation required for reductive dechlorination.
- EDS-Substrate Shuttle™ – Alcohol Cosolvent & Conditioning Agent: Improves amendment distribution, dissolves residual organic accretions, and helps maintain well performance during injection operations.
How the System Works Together
When deployed as an integrated platform:
- EDS-ER™ supplies the long-term electron donor
- EDS-Activator™ enhances substrate conversion efficiency
- EDS-Substrate Shuttle™ improves delivery and injectivity
Together, these components support:
- Faster establishment of reducing conditions
- Improved distribution within heterogeneous formations
- Reduced biofouling and operational downtime
- Sustained treatment performance
Applications
EDS-Advanced™ is well suited for:
- Chlorinated ethenes (PCE, TCE, DCE, VC)
- Chlorinated ethanes
- Source areas and plume cores
- Sites requiring improved injectivity and amendment control
The platform may be used with or without bioaugmentation cultures, depending on site conditions and remedial objectives.
Implementation Approach
EDS-Advanced™ is implemented under site-specific work plans, with component ratios, sequencing, and injection strategies tailored to hydrogeology, contaminant mass, and performance goals.
Application rates and sequencing are site-specific and determined based on site conditions and remedial objectives.
Why Use EDS-Advanced™
- Improves amendment distribution
- Enhances electron donor efficiency
- Reduces operational challenges
- Mitigates biofouling risks
- Supports more predictable remediation outcomes
