Abstract

The H2-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 <50ppb which is the National Pollutant Discharge Elimination System (NPDES) criteria for the brine to be released into the environment. When selenate was removed to <50ppb, 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 H2.

Original languageEnglish (US)
Pages (from-to)6360-6364
Number of pages5
JournalBioresource Technology
Volume102
Issue number10
DOIs
StatePublished - May 1 2011

Keywords

  • Flue-gas-desulfurization
  • Hydrogen
  • Membrane
  • Nitrate
  • Selenate

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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