Download or read book A Modeling Study for the Implementation of in Situ Cometabolic Bioremediation of Trichloroethylene Contaminated Groundwater written by John Christ and published by . This book was released on 1997-12-01 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: The limitations of conventional groundwater remediation technologies have led to the development of innovative technologies which may achieve national hazardous waste site remediation goals. Before an innovative technology can be implemented in the field, remedial project managers, regulators and other stakeholders require adequate modeling tools to help assess the applicability of the technology at a particular site. This modeling study investigates how an innovative technology, in situ cometabolic bioremediation, might be implemented to remediate a TCE-contaminated site, under different site conditions. A steady- state model is developed which couples an analytical expression to simulate the effect of flow between multiple pumping and injection wells, with an expression to calculate TCE removal as groundwater circulates through in situ bioreactors established around the injection wells. Varying site conditions and well configurations are investigated to determine their effect on the overall treatment efficiency of a system. A dual screen well design is found to be an effective method for contaminant capture and treatment given typical values of anisotropy. Investigation of a multiple row implementation concept proves it to be an effective configuration for site cleanup. The model is integrated into interactive software which serves as a technology screening tool.
Download or read book A Modeling Study for the Implementation of in Situ Cometabolic Bioremediation of Trichlorethylene contaminated Groundwater written by John A. Christ and published by . This book was released on 1997 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Consequences of Microbial Interactions with Hydrocarbons Oils and Lipids Biodegradation and Bioremediation written by Robert J. Steffan and published by Springer. This book was released on 2019-08-22 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book international experts discuss the state-of-the-art in the biological degradation of hydrocarbons to meet remedial or disposal goals. The work focuses on practical applications, often on globally important scales including the remediation of some of the world’s largest crude oil spills. Other related chapters discuss important implications of microbial transformation of hydrocarbons, including treatment of high fat processing wastes, impacts of microbial biodegradation activity on industrial processes, and the implications of microbial oil degradation in relation to modern oil extraction processes like hydraulic fracturing of shales and extraction of oil sands.
Download or read book Modeling a Field Application of in Situ Bioremediation of Perchlorate Contaminated Groundwater Using Horizontal Flow Treatment Wells HFTWs written by Peter G. Chosa and published by . This book was released on 2004-03-01 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: Perchlorate contaminated groundwater is rapidly becoming a significant environmental remediation issue for the Department of Defense. In this study, an existing numerical model that simulates the operation of a Horizontal Flow Treatment Well (HFTW) system to effect the in situ biodegradation of perchlorate through the addition of an electron donor is modified to include a submodel that describes bioclogging. Bioclogging restricts flow out of the HFTW due to the accumulation of biomass directly adjacent to the well. The modified model is then applied to an existing perchlorate contaminated site that will be used for an evaluation of the HFTW technology. Simulations were conducted to determine the impact of altering various engineered parameters on HFTW performance. Simulation results indicate that higher time averaged electron donor concentrations and HFTW pumping rates lead to more perchlorate degradation in terms of total mass of perchlorate removed. Simulation results also indicate that varying the electron donor addition schedule has little impact on HFTW performance. The simulations conducted in this study show that, regardless of the engineered parameter values, bioclogging does not impact the ability of the HFTW technology to effect in situ biodegradation of perchlorate at the evaluation site.
Download or read book Bioaugmentation with Burkholderia Cepacia PR1301 for in Situ Bioremediation of Trichloroethylene Contaminated Water written by and published by . This book was released on 1998 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Delivery and Mixing in the Subsurface written by Peter K. Kitanidis and published by Springer Science & Business Media. This book was released on 2012-04-23 with total page 351 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is meant to provide the practitioner with information on the natural mixing processes occurring in aquifers as well as to describe basic strategies that can be implemented to enhance mixing in particular cases. For example, when it comes to mixing miscible liquids, one can speed up mixing in the formation by manipulating the flow such as through the use of recirculation wells. Furthermore, much of the mixing can be achieved partially within recirculation wells themselves, where contaminated water is admixed with additives, volatile products may be removed through a vapor mass exchanger, etc. Thus, adding mixing wells can significantly increase the performance of the delivery and mixing system and speed up the process of remediation.
Download or read book Modeling Application of Hydrogen Release Compound to Effect in Situ Bioremediation of Chlorinated Solvent contaminated Groundwater written by Ryan C. Wood and published by . This book was released on 2005 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Engineered Approaches to in Situ Bioremediation of Chlorinated Solvents written by and published by DIANE Publishing. This book was released on 2000 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book In situ Bioremediation of TCE contaminated Groundwater written by and published by . This book was released on 1998 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the final report of a two-year, Laboratory Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). A barrier to wider use of in situ bioremediation technology is that results are often variable and difficult to predict. In situ bioremediation has shown some very notable and well publicized successes, but implementation of the technology is complex. An incomplete understanding of the effects of variable site characteristics and the lack of adequate tools to predict and measure success have made the design, control and validation of bioremediation more empirical than desired. The long-term objective of this project is to improve computational tools used to assess and optimize the expected performance of bioremediation at a site. An important component of the approach is the explicit inclusion of uncertainties and their effect on the end result. The authors have extended their biokinetics model to include microbial competition and predation processes. Predator species can feed on the microbial species that degrade contaminants, and the simulation studies show that species interactions must be considered when designing in situ bioremediation systems. In particular, the results for TCE indicate that protozoan grazing could reduce the amount of biodegradation by about 20%. These studies also indicate that the behavior of barrier systems can become complex due to predator grazing.
Download or read book In Situ Bioremediation of Trichloroethylene Using Burkholderia Cepacia G4 PR1 written by Richard A. Snyder and published by . This book was released on 1998 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book In Situ Bioremediation of Ground Water and Geological Material written by Robert D. Norris and published by DIANE Publishing. This book was released on 1995-08 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a detailed background of the technologies available for the bioremediation of contaminated soil & ground water. Prepared for scientists, consultants, regulatory personnel, & others who are associated in some way with the restoration of soil & ground water at hazardous waste sites. Also provides insights to emerging technologies which are at the research level of formation, ranging from theoretical concepts, through bench scale inquiries, to limited field-scale investigations. 95 tables & figures.
Download or read book IRP Aerobic Cometabolic In Situ Bioremediation Technology Guidance Manual and Screening Software User s Guide written by and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Trichioroethene (TCE) is the most commonly detected contaminant at Super fund sites in the U.S. It has been widely used for degreasing and cleaning activities. TCE was commonly discharged to the environment for disposal purposes. In recent years, the hazards of exposure to TCE and other chlorinated aliphatic hydrocarbons (CAHs) have been documented. These compounds can pose a serious threat to human health or the environment. Aerobic cometabolic in situ bioremediation is an innovative technology being used for treatment of groundwater contaminated with CAHs, especially TCE. This document presents the principles of aerobic cometabolic in situ bioremediation as well as mathematical models used describe the technology and a discussion of its applicability and limitations. A section of this document describes a software program that can help determine if this technology is appropriate for implementation. The steps needed to design and implement the technology, based upon results of a full-scale evaluation at Edwards AFB, CA, are also presented. The document concludes with a discussion surrounding regulatory acceptance the technology and a description of case studies where the technology has been implemented in the field. This document is designed for use by project managers not necessarily experienced in treatment technology design who are exploring potential technology alternatives for groundwater treatment.
Download or read book In Situ Bioremediation of Perchlorate in Groundwater written by Hans F. Stroo and published by Springer Science & Business Media. This book was released on 2008-12-02 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the late 1970s and early 1980s, our nation began to grapple with the legacy of past disposal practices for toxic chemicals. With the passage in 1980 of the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), commonly known as Superfund, it became the law of the land to remediate these sites. The U. S. Department of Defense (DoD), the nation’s largest industrial organization, also recognized that it too had a legacy of contaminated sites. Historic operations at Army, Navy, Air Force, and Marine Corps facilities, ranges, manufacturing sites, shipyards, and depots had resulted in widespread contamination of soil, groundwater, and sediment. While Superfund began in 1980 to focus on remediation of heavily contaminated sites largely abandoned or neglected by the private sector, the DoD had already initiated its Installation Restoration Program in the mid 1970s. In 1984, the DoD began the Defense Environmental Restoration Program (DERP) for contaminated site assessment and remediation. Two years later, the U. S. Congress codified the DERP and directed the Secretary of Defense to carry out a concurrent program of research, development, and demonstration of innovative remediation technologies. As chronicled in the 1994 National Research Council report, “Ranking Hazardous-Waste Sites for Remedial Action”, our early estimates on the cost and suitability of existing technologies for cleaning up contaminated sites were wildly optimistic. Original estimates, in 1980, projected an average Superfund cleanup cost of a mere $3.
Download or read book Modeling in Situ Bioremediation of Perchlorate contaminated Groundwater written by Roland E. Secody and published by . This book was released on 2007 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of In situ Methanotrophic Bioremediation for Contaminated Groundwater St Joseph Michigan written by Perry L. McCarty and published by . This book was released on 1990 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes the results of a nine-month study to evaluate the feasibility of using indigenous bacteria that use methane as a source of cell carbon and energy (methanotrophs) for degrading chlorinated solvents and their degradation products in groundwater at a site in St. Joseph, Michigan. At this site, trichloroethylene (TCE), 1,2-cis-dichloroethylene (c-DCE), 1,2-trans-dichloroethylene (t-DCE), and vinyl chloride (VC) are present in the groundwater at concentrations in the range of 1000 micrograms/liter. This site appears to be a suitable candidate for evaluating the potential for full-scale treatment using a process that has been evaluated in the laboratory and field over a four-year period at Stanford University.
Download or read book Evaluation of In situ Methanotrophic Bioremediation for Contaminated Groundwater St Joseph Michigan written by Perry L. McCarty and published by . This book was released on 1990 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes the results of a nine-month study to evaluate the feasibility of using indigenous bacteria that use methane as a source of cell carbon and energy (methanotrophs) for degrading chlorinated solvents and their degradation products in groundwater at a site in St. Joseph, Michigan. At this site, trichloroethylene (TCE), 1,2-cis-dichloroethylene (c-DCE), 1,2-trans-dichloroethylene (t-DCE), and vinyl chloride (VC) are present in the groundwater at concentrations in the range of 1000 micrograms/liter. This site appears to be a suitable candidate for evaluating the potential for full-scale treatment using a process that has been evaluated in the laboratory and field over a four-year period at Stanford University.--Introduction, page 1.
Download or read book Modeling Cometabolic in Situ Groundwater Bioremediation Utilizing Gaseous Nutrient and Substrate Delivery written by Neil Stephen Renninger and published by . This book was released on 1997 with total page 307 pages. Available in PDF, EPUB and Kindle. Book excerpt:
