Showing results for: in-situ bioremediation Articles
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Feasibility study of in-situ bioremediation for nitrobenzene-contaminated groundwater
Although many studies have simulated in-situ bioremediation of contaminated groundwater, most of them have not considered hydrochemical conditions and indigenous microorganisms, thus potentially rendering results inapplicable to actual in-situ groundwater bioremediation projects. This study focused on a nitrobenzene-contaminated groundwater site located in Jilin City, China. The actual ...
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Nitrate and Perchlorate Bioremediation in Ground Water
In Situ Bioremediation Eliminated Pump and Treat and Ion-Exhange Treatment Cost Site closure reached in less than half the time and at less than half the cost CL-Out bioremediation was implemented at a confidential manufacturing site to remediate nitrate and perchlorate concentrations in soil and ground water. A pump and treatment system was installed and operated for years in immediate response ...
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In Situ TCE Bioremediation Rates
The following chart is a compilation of CL-Out bioremediation results from eleven different sites where ground water was contaminated by trichloroethylene (TCE). The sites represent all kinds of geological conditions with the full range of TCE concentrations in ground water. Overall, the results show an average removal rate of 97% . However, the final TCE concentration reached below detection ...
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In Situ Bioremediation of Chlorinated Solvents
ABSTRACT: In situ bioremediation is ongoing at a former manufacturing facility in Portland, Oregon. Shallow groundwater at the site was impacted by chlorinated solvents, primarily trichloroethene and degradation products cis-1,2-dichloroethene and vinyl chloride. In situ chemical oxidation treatment was completed in 2003 via the injection of sodium permanganate in source areas. Subsequent ...
By Redox Tech
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Integrated 3D physical-numerical modelling for simulating bioremediation of petroleum contamination in heterogeneous subsurface environment
This study presents physical-numerical modelling of petroleum contaminant transport and enhanced in situ bioremediation in heterogeneous subsurface environment. The approach is based on development of a three-dimensional multi-layered physical model coupled with a three-dimensional multiphase multi-component numerical model. An experimental scheme was designed to conduct 40-day benzene transport, ...
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In Situ Bioremediation of Chlorinated Solvents: A Case Study
In situ bioremediation is ongoing at a former manufacturing facility in Portland, Oregon. Shallow groundwater at the site was impacted by chlorinated solvents, primarily trichloroethene and degradation products cis-1,2-dichloroethene and vinyl chloride. In situ chemical oxidation treatment was completed in 2003 via the injection of sodium permanganate in source areas. Subsequent stimulation of in ...
By Redox Tech
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In Situ Remediation of Perchlorate in Soil and Groundwater, M.S. Thesis, California State University San Bernardino
This research project documents a technology assessment for in-situ bioremediation of perchlorate (ClO4-). The main goals are to compare methodologies, perform site characterization of soil and groundwater, and perform microcosm and bench scale tests. In this approach, perchlorate is reduced to chloride, requiring an electron donor. The suitability of electron donor amendments will be assessed ...
By Redox Tech
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Conducted demonstration projects for bioremediation technologies treating chlorinated organic constituents in the groundwater and soil at Dover Air Force Base
LOCATION: Dover, DelawarePROJECT DATE: July, 1996 to July, 1999CLIENT: The Remediation Technology Development Forum and Dover AFB BACKGROUND: The Remediation Technology Development Forum (RTDF) for Bioremediation of Chlorinated Solvents Work Group has conducted demonstration projects for bioremediation technologies treating chlorinated organic constituents in the groundwater and soil at Dover ...
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Protocol for Enhanced In Situ Bioremediation Using Emulsified Edible Oil
An in-depth discussion of the EOS® patented technology and its usefulness for site remediation is presented. Details of how the technology works, design considerations as well as strengths and limitations of the technology are presented. 1.1 INTRODUCTION Management of groundwater contaminated with chlorinated solvents, perchlorate, and explosives is one of the Department of Defense’s ...
By Redox Tech
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Bioremediation/natural attenuation continues after ISCO treatment
Scientists and engineers from the private sector and EPA are evaluating the potential for in situ bioremediation and/or natural attenuation to successfully treat residual soil and ground-water contamination after source-area in situ chemical oxidation (ISCO) treatment. The studies were prompted by concerns that the two treatment technologies may be incompatible due to detrimental impacts on ...
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Anaerobic Bioremediation of Groundwater Using Edible Oil Substrate EOS® In an Unconfined Groundwater Aquifer
ABSTRACT: To treat groundwater contaminants in situ, enhanced anaerobic bioremediation processes can be stimulated through addition of soluble substrates. At a dry cleaners site located in San Jose, California, the goal was to find a substrate that is long lasting and easily distributed into the saturated soils. After evaluating several alternatives, in situ bioremediation using an emulsified ...
By Redox Tech
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Enhanced bioremediation of groundwater using in-well methods – Case Study
Overview: This white paper provides a comparison of two groundwater treatment methods that are used to facilitate remediation of floating and dissolved petroleum hydrocarbons in groundwater. Both methods have some merit. However, United Remediation Technology (UniRemTech)’s Wellboom ™ can provide a faster and longer lasting solution due to its composition of absorption and in-situ ...
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Rushing Remediation - Cometabolic bioremediation accelerates natural degradation of groundwater and soil contaminants
Untitled Document Field studies have shown that many organic contaminants degrade naturally by microorganisms present in soil and groundwater. This naturally occurring bioremediation, known as natural attenuation, has been accepted as a passive remediation process for contaminated soil and groundwater. When the natural degradation is insufficient to meet remediation ...
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In-situ Aerobic Bioremediation of Recalcitrant Organics: A Case Study Demonstrating Benefits and Potential Limitations
Abstract A history of spills and/or releases at two adjacent dry cleaning facilties in the Houston, Texas area resulted in significant soil and shallow ground-water contamination. The soils at the adjacent properties (collectively called 'the Site') are relatively permeable allowing for rappid vertical migration at the source area(s) and lateral migration in the shallow ground water. The ...
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DOD evaluates bioaugmentation for remediating low-pH aquifers
The US Department of Defense (DOD) has completed pilot-scale work on the 'MAG-1' site at Fort Dix, NJ, to test suitability of anaerobic bioremediation for an aquifer with low pH. Project results will be used to design full-scale ground-water treatment at MAG-1. In addition, technical criteria gained from the demonstration will be integrated into DOD’s remediation strategy for its many facilities ...
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In situ Chemical Oxidation: An Innovative Groundwater Remediation Technology
A promising new technology, in situ Chemical Oxidation (ISCO), has the potential to supplant the more widely used pump-and-treat groundwater remediation technology by destroying groundwater contamination in situ (in place). ISCO is the process of oxidizing contaminants in the groundwater and soil by injecting water containing high concentrations of an oxidant to the site of the contamination. ...
By AECOM
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Enhanced Bioremediation
Introduction Enhanced bioremediation is a process in which indigenous or inoculated micro-organisms (e.g., fungi, bacteria, and other microbes) degrade (metabolize) organic contaminants found in soil and/or ground water, converting them to innocuous end products. Nutrients, oxygen, or other amendments may be used to enhance bioremediation and contaminant desorption from subsurface materials. ...
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Aerobics to the Rescue - Using Compatible Technologies to Improve Groundwater Remediation
Background Increased opportunities for contaminated property redevelopment have propelled property owners to evaluate options for accelerating site remediation. In some cases a containment technology may have been implemented to mitigate the off-property migration of contamination as the most practical option at the time. Focusing on the property's redevelopment potential, there is new ...
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Waterloo Emitters used for Bioremediation Study in High Temperature Saline Groundwater
A study was undertaken to determine the success for aerobic bioremediation of aromatic hydrocarbons (BTEX) and MTBE (methyl tert-butyl ether) in high temperature, saline groundwater conditions. The study included laboratory microcosm experiments, as well as a field trial in Saudi Arabia, in which Solinst Waterloo Emitters were used. To view the full paper published about this study, please visit ...
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In-Situ Anaerobic Remediation of Perchlorate-Impacted Soils
AbstractARCADIS is currently leading the development, evaluation, and selection of a final groundwater remedy for a 94-acre manufacturing facility in the western U.S. This facility has produced small explosives and vehicular safety products since 1957. As a result of historic operations, soil and groundwater at the site have been impacted by perchlorate. To date, remediation efforts have been ...
By Arcadis
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