MODELING STUDIES TO SUPPORT DESIGN OF A FIELD EVALUATION OF IN SITU BIOREMEDIATION OF PERCHLORATE-CONTAMINATED GROUNDWATER
Perchlorate-contaminated groundwater is a significant environmental problem within the United States. In this study, a numerical model is used to simulate operation of a dual-well groundwater circulation system (known as a horizontal flow treatment well or HFTW system) to mix electron donor into perchlorate-contaminated groundwater in order to stimulate indigenous microorganisms to biologically reduce the perchlorate, which serves as an electron acceptor. The model simulates the physical, chemical, and biological processes that affect the fate and transport of electron donor, perchlorate, and competing electron acceptors like nitrate and oxygen that may also be present in the groundwater. In addition, the model incorporates hydraulic conductivity reductions that may result from biological growth near the wells (i.e. bioclogging). The model was applied to simulate operation of an HFTW system that is being designed to inject an electron donor into perchlorate-contaminated groundwater at the Aerojet facility near Sacramento, California. Model results were used to determine design parameters such as treatment well pumping rates and electron donor injection concentration and schedule. Model results demonstrate that this technology can effectively deliver electron donor to the subsurface to stimulate perchlorate biodegradation and contain the perchlorate plume at the Aerojet facility. The model presented in this study is an important tool in helping design the field evaluation, and it should prove useful in interpreting the evaluation results. Ultimately, it is anticipated that the model will be applied as a design tool for implementing the HFTW technology at other sites with perchlorate-contaminated groundwater.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
Document Type: Research Article
Publication date: 2004-01-01
More about this publication?
- Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed. A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.
WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
- Subscribe to this Title
- Membership Information
- About WEF Proceedings
- WEFTEC Conference Information
- Learn about the many other WEF member benefits and join today
- Ingenta Connect is not responsible for the content or availability of external websites