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AWWA WKICO66056
- Simultaneous Bio-reduction of Multiple Oxidized Contaminants in Groundwater Using a Hydrogen-based Membrane Biofilm Reactor (MBfR)
- Conference Proceeding by American Water Works Association, 01/01/2008
- Publisher: AWWA
$12.00$24.00
This powerpoint presentation explores using a hydrogen-based membrane biofilm reactor (MBfR) for simultaneous bio-reduction of multiple oxidized contaminants in groundwater. Drivers for using hydrogen gas (H<sub>2</sub>) as an electron donor are listed, along with the benefits of using autotrophic bacteria. A schematic of a laboratory MBfR system is provided, and the following topics are presented: an explanation of "Counter Diffusion" in the MBfR; CLSM of biofilm formed in MBfR; reductions of nitrate,perchlorate, and selenate byMBfR; the reduction reactions and the immediatereduction efficiencies for the contaminants inMBfRs acclimated to nitrate; Microorganismsin the perchlorate and nitrate system; reduction of perchlorate by an MBfR- a long-term test without nitrate present; simultaneous reduction of nitrate andperchlorate in a real groundwater; and, Simultaneous Reduction ofNitrate and Selenate - changing H<sub>2</sub> pressure toimprove reduction, and changing Se(VI) loading toobtain 100% reduction. Includes 8 references, figures.
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