Hanford 100-D Area Biostimulation Treatability Test Results

Truex, Michael J. ; Vermeul, Vincent R. ; Fritz, Brad G. ; Mackley, Rob D. ; Mendoza, Donaldo P. ; Elmore, Rebecca P. ; Mitroshkov, Alexandre V. ; Sklarew, Deborah S. ; Johnson, Christian D. ; Oostrom, Martinus ; Newcomer, Darrell R. ; Brockman, Fred J. ; Bilskis, Ch

关键词: AQUIFERS;    BACTERIA;    OXYGEN;    SUBSTRATES bioremediation;    treatability test;    nitrate;    chromium;    Environmental Molecular Sciences Laboratory;   

DOI  :  10.2172/1010484
RP-ID  :  PNNL-18784
PID  :  OSTI ID: 1010484
Others  :  Other: 30495
Others  :  830403000
Others  :  TRN: US201112%%141

学科分类：环境科学（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

Pacific Northwest National Laboratory conducted a treatability test designed to demonstrate that in situ biostimulation can be applied to help meet cleanup goals in the Hanford Site 100-D Area. In situ biostimulation has been extensively researched and applied for aquifer remediation over the last 20 years for various contaminants. In situ biostimulation, in the context of this project, is the process of amending an aquifer with a substrate that induces growth and/or activity of indigenous bacteria for the purpose of inducing a desired reaction. For application at the 100-D Area, the purpose of biostimulation is to induce reduction of chromate, nitrate, and oxygen to remove these compounds from the groundwater. The in situ biostimulation technology is intended to provide supplemental treatment upgradient of the In Situ Redox Manipulation (ISRM) barrier previously installed in the Hanford 100-D Area and thereby increase the longevity of the ISRM barrier. Substrates for the treatability test were selected to provide information about two general approaches for establishing and maintaining an in situ permeable reactive barrier based on biological reactions, i.e., a biobarrier. These approaches included 1) use of a soluble (miscible) substrate that is relatively easy to distribute over a large areal extent, is inexpensive, and is expected to have moderate longevity; and 2) use of an immiscible substrate that can be distributed over a reasonable areal extent at a moderate cost and is expected to have increased longevity.