Journal
BIORESOURCE TECHNOLOGY
Volume 102, Issue 10, Pages 6360-6364Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2011.03.010
Keywords
Nitrate; Selenate; Flue-gas-desulfurization; Membrane; Hydrogen
Funding
- Aptwater (Pleasant Hill, CA)
- Aquatech International (Canonsburg, PA)
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The H-2-based membrane biofilm reactor (MBfR) was shown to consistently remove nitrate, nitrite, and selenate at high efficiencies from Flue-gas desulfurization brine. Selenate was removed to <50 ppb which is the National Pollutant Discharge Elimination System (NPDES) criteria for the brine to be released into the environment. When selenate was removed to <50 ppb, nitrate and nitrite were still present in the mg/L range which suggests that selenate is able to be secondarily reduced to low levels when nitrate and nitrite serve as the main electron acceptors for bacterial growth. SO42- was not removed and therefore did not compete with nitrate and selenate reduction for the available H-2. (C) 2011 Elsevier Ltd. All rights reserved.
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