REGENESIS offers a range of specialty soil and groundwater remediation products, each one has been specifically designed for environmental applications with an emphasis on performance, cost-effectiveness, ease of use and environmental safety.
Rapid Sorption and Biodegradation with PlumeStop
PlumeStop® Liquid Activated Carbon™ is a break-through groundwater remediation technology that reduces dissolved phase contaminant plumes in days. The key innovation with PlumeStop is that it is composed of extremely fine particles of activated carbon (1‐2μm) suspended in water through a proprietary dispersion chemistry developed by the REGENESIS Research and Development department.This allows the technology to flow into the subsurface at low pressure and achieve consistent, reliable distribution – a capability unlike any other form of activated carbon used for groundwater remediation today.
As a result, environmental professionals gain a certainty that the contaminants have been removed throughout the entire treated area. It also secures complete biodegradation of contaminants, and continually regenerates its sorptive capacity, allowing for long term treatment. PlumeStop is often applied with enhanced aerobic biodegradation or enhanced anaerobic biodegradation remediation technologies to ensure rapid and complete contaminant destruction.
Oxygen Release Compound (ORC®) and Advanced Oxygen Release Compound (ORC Advanced®)are specifically designed and used for the enhanced or accelerated, in situ aerobic biodegradation of a wide-range of petroleum hydrocarbons or any aerobically degradable substance. Enhanced aerobic biodegradation is the well understood and widely studied practice of adding oxygen (an electron acceptor) to groundwater and/or soil to increase the number and vitality of indigenous
microorganisms able to perform biodegradation. REGENESIS’ ORC and ORC Advanced products are typically injected into groundwater or applied into open excavations where upon hydration they provide a controlled-release source of oxygen for periods of up to 12 months on a single application.
3-D Microemulsion is an injectable liquid material specifically designed for in situ remediation projects where the anaerobic biodegradation of chlorinated compounds through the enhanced reductive dechlorination (ERD) process is possible. ERD is the primary anaerobic biological process by which problematic chlorinated solvents such as tetrachloroethylene (PCE) and trichloroethene (TCE), dichloroethene (DCE) and vinyl chloride (VC) in groundwater are biologically transformed into less harmful end products such as ethene. Due to its purposefully engineered structure, 3-D Microemulsion exhibits unique subsurface distribution characteristics which allow it to propagate widely within the subsurface.
As a result, 3-D Microemulsion can treat a wide-areas around an individual injection point saving both time and money as it relates to the number of application points required. This product provides a beneficial and sequential, staged-release of three individual electron donor components, resulting in an immediate, mid-range and long-term, controlled-release supply of organic acids to fuel the ERD process. Staged-release offers the ERD optimizing benefit of supplying just the right amount of electron donor needed for periods of up to 2-4 years on a single application.
Geochemistry and anaerobic bioremediation performance parameters are well understood and easily monitored with the in situ application of all of these products. They are also highly compatible with anaerobic bioaugmentation approaches using Bio-Dechlor INOCULUM PLUS. They allow for a clean, low-cost, non-disruptive application (permanent wells, direct-push, excavations, etc.), and eliminate the need for on-going operations and maintenance. Using these in situ anaerobic bioremediation technologies results in a faster and often lower cost approach than drawn out natural attenuation.
CRS® (Chemical Reducing Solution) is an iron-based amendment for in situ chemical reduction (ISCR) of halogenated hydrocarbon contaminants such as chlorinated ethenes and ethanes. CRS is a pH neutral, liquid iron solution that is easily mixed with 3-D Microemulsion Factory Emulsified before injection into contaminated groundwater. CRS is a soluble, food-grade source of ferrous iron (Fe2+), designed to precipitate reduced iron sulfides, oxides, and/or hydroxides. These Fe2+ minerals are capable of destroying chlorinated solvents via chemical reduction pathways, thus improving the efficiency of the overall reductive dechlorination process by providing multiple pathways for contaminant degradation in groundwater.
The incorporation of iron as metallic particles or ferrous salts (Fe2+) can enhance chlorinated contaminant remediation by enabling various chemical reduction pathways. The overall combination of biological and chemical processes are referred to as “biogeochemical” reduction of contaminants. Biogeochemical reduction utilizes the biologically-generated reducing environment to create reduced iron precipitates that then go on to chemically reduce chlorinated solvents.
Bioaugmentation is the term used to describe the addition of cultured microorganism to the subsurface that are capable of biodegrading or transforming specific groundwater/soil contaminants. In some cases certain microorganisms are more specialized at degrading specific target contaminants, i.e some microbes can degrade DCE and VC but not TCE or vice-versa. As a result, remediation industry practices and recommendations are now shifting toward a more prescriptive approach to bioaugmentation to achieve cost-savings and speed up site remediation.
Bio-Dechlor INOCULUM® PLUS is an enriched natural microbial consortium containing species of Dehalococcoides sp. (DHC). This microbial consortium has since been enriched to increase its ability to rapidly dechlorinate contaminants during in situ bioremediation processes. Bio-Dechlor INOCULUM has been shown to stimulate the rapid and complete dechlorination of compounds such as tetrachloroethene (PCE), trichloroethene (TCE), dichloroethene (DCE), and vinyl chloride (VC).
The most current culture of Bio Dechlor INOCULUM PLUS(+) now contains microbes capable of dehalogenating halomethanes (e.g. carbon tetrachloride and chloroform) and haloethanes (e.g. 1,1,1 TCA and 1,1, DCA) as well as mixtures of these halogenated contaminants.
PersulfOx® Catalyzed Persulfate is an in situ chemical oxidation reagent that destroys organic contaminants found in groundwater and soil through powerful yet controlled chemical reactions. PersulfOx is a sodium persulfate – based technology which employs a patented catalyst to enhance the oxidative destruction of both hydrocarbons and chlorinated contaminants in the subsurface. The PersulfOx catalyst is a silica-based, microscopic surface on which oxidants and contaminants can come together and react in a specific process known as “surface mediated oxidation” where oxidation reactions occur repeatedly on the surface of the catalyst.
Typically, sodium persulfate is activated with the addition of heat, chelated metals, hydrogen peroxide, or base in order to generate sulfate radicals. These activation processes are inherently complex, costly and can pose additional health and safety risks. In comparison, PersulfOx provides an all-in-one product with built-in-activation making it a relatively safe and easy-to-use ISCO reagent. The material itself is easily mixed with water and applied into the contaminated matrix using subsurface injection techniques or soil mixing tools.
RegenOx® is a product designed specifically for the rapid, in situ and/or ex situ chemical oxidation of a broad range of contaminants including both chlorinated solvents and petroleum hydrocarbons. RegenOx has been rigorously tested in both the laboratory and the field on petroleum hydrocarbons (TPH, BTEX, MTBE, etc), polyaromatic hydrocarbons (naphthalene, phenanthrene, etc) and chlorinated hydrocarbons (PCE, TCE, TCA, etc). In situ chemical oxidation (ISCO) is a process that involves the injection of reactive chemical oxidants into groundwater and/or soil for the primary purpose of rapid contaminant destruction (often within days to weeks). Also known as ISCO, this process is most often deployed at sites with relatively high contaminant concentrations in a source area and in downgradient plume(s).
Chemical oxidation of high concentration areas is often part of a multi-step remediation regimen that paves the way for more biologically mediated, less costly approaches such as enhanced biodegradation or monitored natural attenuation. RegenOx delivers rapid and effective contaminant mass reduction using a solid alkaline oxidant that is activated to a very high performance level through the action of a unique catalytic complex. Once in the subsurface, the combined product produces an effective oxidation reaction comparable to that of Fenton’s Reagent without a violent exothermic reaction. Strategies employing multiple RegenOx injections coupled with follow-on enhanced biodegradation can be used to cost-effectively treat highly contaminated sites to regulatory closure.
Metals Remediation Compound (MRC®) is a product designed to remove a dissolved metals, particularly hexavalent chromium (Cr6) from groundwater via in situ immobilization while providing an additional electron donor substrate for the enhanced biodegradation of chlorinated compounds. MRC is simply injected into groundwater where upon hydration it becomes subject to microbial biodegradation. While being degraded it slowly releases its active ingredient, a benign organosulfur compound (BOC). Upon contact with metal ions, the BOC reacts to produce a metal-organosulfur complex.
This complex sorbs strongly to soil and is immobile in the subsurface. Over time the organic portion of the metal-organosulfur complex is also biodegraded and the complexed metal is incorporated into the soil matrix as a sulfide solid. The BOC can also act as a direct reductant for metals like chromium and uranium that precipitate as hydroxides and oxides. MRC also provides a substrate similar to that of HRC for accelerated reductive dechlorination of chlorinated compounds making it highly suitable for mixed plumes containing both metals and chlorinated.
PetroCleanze™ is a customized formulation of the widely used RegenOx in situ chemical oxidation (ISCO) technology. This two-part reagent contains purposefully enhanced, detergent-like properties which significantly increase the desorption rates of hydrocarbons bound in saturated soils. Once the hydrocarbons are liberated into the dissolved-phase, they are more readily available for removal using a range of enhanced recovery techniques. PetroCleanze is designed to increase the viability and efficiency of enhanced recovery techniques such as dual-phase extraction, vacuum enhanced extraction and pump and treat systems. Based on site conditions, the PetroCleanze driven enhanced desorption process makes it possible to clean up heavily impacted sites faster and more cost-effectively than through traditional mechanical means or stand-alone ISCO approaches.
In cases where significant contaminant mass removal is required, multiple injections of PetroCleanze followed by multiple contaminant extraction events is advised. PetroCleanze also incorporates chemically engineered technology that avoids the addition of problematic carbon loading associated with standard surfactant-based technologies. Instead, PetroCleanze creates surfactants in place thereby enhancing the hydrocarbon removal process.
REGENESIS® offers remediation professionals a suite of innovative technologies and services to treat a wide range of contaminants, including petroleum hydrocarbons and chlorinated solvents, via enhanced bioremediation, chemical oxidation, desorption and metals immobilization.