Biological denitrification in a continuous-flow pilot bioreactor containing immobilized Pseudomonas butanovora cells

Péter Kesserü, István Kiss, Zoltán Bihari, Béla Polyák

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

Pseudomonas butanovora, a novel denitrifying bacterium, was immobilized in composite beads and filled into a reactor system. The pilot bioreactor average denitrification activity was at ethanol-C:nitrate-N ratios of 3:1 and 1.5:1 0.88 and 0.54 kg NO3--Nm-3d-1, respectively. The denitrification was stable in spite of the relatively low hydraulic retention times of 2.47 and 3 h. The nitrate content of the influent was almost completely reduced at the first level of the bioreactor and the nitrite formed underwent reduction in the upper part of the reactor. The experimentally determined optimum ethanol-C:nitrate-N ratio was 1.41±0.41. In consequence of the aerobic conditions, the acetic acid produced by the oxygenation of ethanol was also detectable in the reactor effluent. The pH of the effluent (7.58) never exceeded the acceptable maximum (8.5). The nitrate removal efficiency of the cells was nearly 100% at both C:N ratios, and the nitrite content of the effluent was around the prescribed limit throughout the continuous operation. This continuous-flow pilot bioreactor containing immobilized P. butanovora cells proved an efficient denitrification system with a relatively low retention time.

Original languageEnglish
Pages (from-to)75-80
Number of pages6
JournalBioresource Technology
Volume87
Issue number1
DOIs
Publication statusPublished - Mar 1 2003

Keywords

  • Acetic acid
  • Cell immobilization
  • Denitrification
  • Ethanol
  • Pseudomonas butanovora

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Biological denitrification in a continuous-flow pilot bioreactor containing immobilized Pseudomonas butanovora cells'. Together they form a unique fingerprint.

  • Cite this