Hydrogen-dependent denitrification in a two-reactor bio-electrochemical system

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

Research output: Contribution to journalArticle

63 Citations (Scopus)

Abstract

An autotrophic biological process was developed for the treatment of nitrate-contaminated drinking water. The system comprised of two steps: the water to be treated was first enriched with hydrogen (energy source) in the cathodic chamber of an electrochemical cell, and then denitrified in the bioreactor. The bioreactor was a packed bed of granulated activated carbon, and the water flow was directed in an upward continuous mode. The system was operated for one year, at various water velocities and current intensities. Denitrification rates up to 0.25kgNm-3d-1 were obtained at the hydraulic residence time of 1h. The system was stable. When detected in the effluent, the concentration of nitrite was low, even under conditions that resulted in the elution of very high concentrations of nitrate. Copyright (C) 2001 Elsevier Science Ltd.

Original languageEnglish
Pages (from-to)715-719
Number of pages5
JournalWater Research
Volume35
Issue number3
DOIs
Publication statusPublished - Feb 2001

Fingerprint

Denitrification
bioreactor
denitrification
hydrogen
nitrate
Bioreactors
Hydrogen
Nitrates
biological processes
nitrite
activated carbon
Water
residence time
water flow
Electrochemical cells
drinking water
Packed beds
effluent
hydraulics
Potable water

Keywords

  • Biological denitrification
  • Drinking water
  • Hydrogen
  • Water electrolysis
  • Water treatment

ASJC Scopus subject areas

  • Earth-Surface Processes

Cite this

Hydrogen-dependent denitrification in a two-reactor bio-electrochemical system. / Szekeres, S.; Kiss, I.; Bejerano, T. T.; Soares, M. I M.

In: Water Research, Vol. 35, No. 3, 02.2001, p. 715-719.

Research output: Contribution to journalArticle

Szekeres, S. ; Kiss, I. ; Bejerano, T. T. ; Soares, M. I M. / Hydrogen-dependent denitrification in a two-reactor bio-electrochemical system. In: Water Research. 2001 ; Vol. 35, No. 3. pp. 715-719.
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