Thesis
Nitrate and radioiodine biogeochemistry in granular activated carbon from a fluidized bed reactor
Washington State University
Master of Science (MS), Washington State University
2018
Handle:
https://hdl.handle.net/2376/101406
Abstract
The 200 West Pump and Treat facility located at the Hanford Site, Washington, treats groundwater contaminated with multiple hazardous and radiological compounds, including nitrate and radioiodine. The facility utilizes a fluidized bed bioreactor (FBR) for groundwater denitrification. Based on evidence that denitrifying bacteria can also reduce iodate, granular activated carbon (GAC) from the FBR was used to inoculate growth media containing different carbon sources in batch studies to determine the effect of a single carbon source on denitrification and iodate reduction. Although the batch study results were inconclusive, there was a significant increase in aqueous iodine concentration over time. This increased iodine concentration is suspected to be from desorption of accumulated iodine from the FBR GAC/biofilm complex; something that has not been previously demonstrated. In order to test this assumption, a bench-scale fluidized bed reactor was designed to more accurately reflect the biophysiochemical conditions within the FBR and create a more accurate test platform for rate testing and process optimization. Successful GAC fluidization in the bench-scale FBR paves the way for future opportunities to examine more accurately the performance of the field-scale FBR.
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Details
- Title
- Nitrate and radioiodine biogeochemistry in granular activated carbon from a fluidized bed reactor
- Creators
- Joseph Morad
- Contributors
- Yonas K. Demissie (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Electrical Engineering and Computer Science, School of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; [Pullman, Washington] :
- Identifiers
- 99900525023601842
- Language
- English
- Resource Type
- Thesis