Electric prompting and control of denitrification

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The effectiveness of a denitrification process which is driven and controlled by an electric current is demonstrated. Denitrifying microorganisms were immobilized on a carbon electrode and hydrogen was produced through the electrolysis of water. The hydrogen was utilized for the reduction of nitrate to N2. The denitrification rate was a linear function of the electric current, and it was shown that about 1 mol of electron reduces 0.2 mol of nitrate to N2 gas. These results exhibit that the proposed process is simple and feasible, especially for the treatment of low-strength nitrate solutions.

Original languageEnglish
Pages (from-to)535-537
Number of pages3
JournalBiotechnology and Bioengineering
Issue number4
Publication statusPublished - 1993 Aug 5
Externally publishedYes



  • Carbon electrode
  • Denitrification
  • electrochemical biofilm process
  • Ground water
  • Nitrate treatment

ASJC Scopus subject areas

  • Biotechnology
  • Microbiology

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