Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Phase II Pilot Test for in Situ Bioremediation to Treat Perchlorate in GET D Recharge Water
Author: Pilot Test for in Situ Bioremediation to Treat Perchlorate in GET D Recharge Water
Author: In Situ Bioremediation of Perchlorate in Groundwater
Author: Hans F. StrooPublisher: Springer
ISBN: 9780387849201
Category : Technology & Engineering
Languages : en
Pages : 248
Book Description
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.
Pilot Test for in Situ Bioremediation of Perchlorate & Trichlorethene in Groundwater at Area 20
Author: Workplan for a Pilot Test of in Situ Bioremediation of Perchlorate and Trichlorethene Impacted Groundwater
Author: Pilot Test for in Situ Bioremediation of Perchlorate & Trichlorethene in Groundwater Using an Active Biobarier, Final Report
Author: Field Demonstration of in Situ Perchlorate Bioremediation at Building 1419
Author: Randall J. CramerPublisher:
ISBN: 9781423514664
Category :
Languages : en
Pages : 80
Book Description
The Applied Technology Department at the Indian Head Division, Naval Surface Warfare Center and Shaw Environmental, Inc., have just successfully completed a field demonstration of in situ bioremediation of a groundwater aquifer contaminated with perchlorate. Using a recirculation cell design, naturally occurring microorganisms were stimulated to degrade perchlorate by injecting a food source (lactate) and neutralizing the groundwater acidity with a carbonate buffer. Starting with perchlorate concentrations in excess of 210 mg/L, perchlorate levels were reduced by more than 95% in eight of the nine test plot monitoring wells over the 5 months of sampling. In two of the monitoring wells, the perchlorate levels were lowered to less than 5 ppb. In addition to the perchlorate levels and the pH, alkalinity, nitrate, and sulfate concentrations were measured. In situ bioremediation techniques are much less expensive and significantly lower in maintenance than traditional ex situ pump- and-treat systems. This is the first field trial conducted on the east coast of the United States, the first trial performed in an acidic aquifer, and the first demonstration of treating in situ perchlorate levels in excess of 200 mg/L. This project provides new and valuable information concerning the application of bioremediation for in situ perchlorate treatment.
Engineered Approaches to in Situ Bioremediation of Chlorinated Solvents
Author: Publisher: DIANE Publishing
ISBN:
Category : In situ bioremediation
Languages : en
Pages : 152
Book Description
Optimizing of in Situ Bioremediation Technology to Manage Perchlorate- Contaminated Groundwater
Author: Mark R. KnarrPublisher:
ISBN: 9781423502609
Category : Bioremediation
Languages : en
Pages : 112
Book Description
Combining horizontal flow treatment wells (HFTWs) with in situ biodegradation is an innovative approach with the potential to remediate perchlorate-contaminated groundwater. A technology model was recently developed that combines the groundwater flow induced by HFTWs with in situ biodegradation processes that result from using the HFTWs to mix electron donor into perchlorate-contaminated groundwater. A field demonstration of this approach is planned to begin this year. In order to apply the technology in the field, project managers need to understand how contaminated site conditions and technology design parameters impact technology performance. One way to gain this understanding is to use the technology model to select engineering design parameters that optimize performance under given site conditions. In particular, a project manager desires to design a system that: 1) maximizes perchlorate destruction; 2) minimizes treatment expense; and 3) attains regulatory limits on down gradient contaminant concentrations. Unfortunately, for a relatively complex technology with a number of engineering design parameters to determine, as well as multiple objectives, system optimization is not straightforward. In this study, a multi-objective genetic algorithm (MOGA) is used to determine design parameter values (flow rate, well spacing, concentration of injected electron donor, and injection schedule) that optimize the first two objectives noted; to maximize perchlorate destruction while minimizing cost. Four optimization runs are performed, using two different remediation time spans (300 and 600 days) for two different sets of site conditions. Results from all four optimization runs indicate that the relationship between perchlorate mass removal and operating cost is positively correlated and nonlinear.
Bioreactor Systems for Treating Perchlorate-Contaminated Water
Author: B. LoganPublisher: International Water Assn
ISBN: 9781843398899
Category : Science
Languages : en
Pages : 320
Book Description
The objective of the project was to develop in the laboratory, and test in the field, a biological water treatment process for treating perchlorate-contaminated water. Bench- scale experiments were conducted on three processes: a packed bed reactor amended with soluble substrates (acetate); a hydrogen gas fed four-phase unsaturated trickle-type packed column; and a membrane-immobilized biofilm reactor. Based on these tests, one reactor system, an acetate-fed packed bed reactor (PSU-O4 system), was selected for further testing in pilot-plant tests at the Texas Street well field in Redlands, California. All three systems successfully removed perchlorate at rates sufficient to achieve an acceptable level of perchlorate removal for subsequent treatment for potable use. Pilot- scale tests at the Redlands site in California showed that perchlorate could be removed to non-detectable levels (