Hydrogen-dependent denitrification: Preliminary assessment of two bio-electrochemical systems

I. Kiss, S. Szekeres, T. T. Bejerano, M. I M Soares

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

An autotrophic biological process for the treatment of nitrate-contaminated drinking water was studied in the laboratory, with the objective of developing a continuous system which would be simple, stable and amenable to upscaling. Hydrogen generated by electrolysis of the water to be treated was the source of energy for denitrifying microorganisms. Two main process configurations were compared: (1) a single reactor where both the generation of hydrogen and denitrification took place, and (2) a two-reactor system where water was first enriched with hydrogen in an electrolysis cell prior to entering a packed-bed bioreactor. The reactors were operated in a continuous mode and granulated activated carbon served as physical support for the biomass. Although the highest rates of denitrification (0.45 kg N m-3 d-1) and the shortest residence times (removal of 18 mg N I-1 in 17 min) were obtained in the single-reactor system, the two-reactor system was more stable and more suitable for upscaling.

Original languageEnglish
Pages (from-to)373-379
Number of pages7
JournalWater Science and Technology
Volume42
Issue number1-2
Publication statusPublished - 2000

Fingerprint

Denitrification
denitrification
hydrogen
Electrolysis
Hydrogen
upscaling
Packed beds
Bioreactors
electrokinesis
Potable water
Microorganisms
Activated carbon
Water
Nitrates
Biomass
biological processes
bioreactor
activated carbon
residence time
microorganism

Keywords

  • Denitrification
  • Hydrogen
  • Water electrolysis
  • Water treatment

ASJC Scopus subject areas

  • Water Science and Technology

Cite this

Hydrogen-dependent denitrification : Preliminary assessment of two bio-electrochemical systems. / Kiss, I.; Szekeres, S.; Bejerano, T. T.; Soares, M. I M.

In: Water Science and Technology, Vol. 42, No. 1-2, 2000, p. 373-379.

Research output: Contribution to journalArticle

Kiss, I. ; Szekeres, S. ; Bejerano, T. T. ; Soares, M. I M. / Hydrogen-dependent denitrification : Preliminary assessment of two bio-electrochemical systems. In: Water Science and Technology. 2000 ; Vol. 42, No. 1-2. pp. 373-379.
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