Hydrogenotrophic denitrification in a microporous membrane bioreactor

Hydrogenotrophic denitrification in a microporous membrane bioreactor Hydrogenotrophic denitrification of nitrate contaminated groundwater in a bench-scale microporous membrane bioreactor has been investigated. To prevent microbial contamination of the effluent from the reactor the nitrate-laden water treated was separated from the denitrifying culture with a 0.02 μm pore diameter membrane. Equal pressure was maintained across the membrane and nitrate was removed by molecular diffusion through the membrane and into the denitrifying culture. The system was operated with a hydrogenotrophic denitrification culture to circumvent the addition of an organic substrate to the water. Removal efficiencies ranging from 96% to 92% were achieved at influent concentrations ranging from 20 to 40 mg/L NO 3 − -N. The flux values achieved in this study were 2.7–5.3 g NO 3 − -N m −2 d −1 . The microporous membrane served as an effective barrier for preventing microbial contamination of the product water as evidenced by the effluent heterotrophic plate count of 9 (±3.5) CFU/mL. The hydrogenotrophic culture was analyzed using available 16S and 23S rRNA-targeted oligonucleotide probes. It was determined that the enrichment process selected for organisms belonging to the beta subclass of Proteobacteria. Further analysis of the hydrogenotrophic culture indicated that the organisms may belong to the β -3 subgroup of Proteobacteria and have yet to be identified as hydrogenotrophic denitrifiers. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Water Research Elsevier

Hydrogenotrophic denitrification in a microporous membrane bioreactor

Water Research, Volume 36 (19) – Nov 1, 2002

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Publisher
Elsevier
Copyright
Copyright © 2002 Elsevier Science Ltd
ISSN
0043-1354
D.O.I.
10.1016/S0043-1354(02)00197-5
Publisher site
See Article on Publisher Site

Abstract

Hydrogenotrophic denitrification of nitrate contaminated groundwater in a bench-scale microporous membrane bioreactor has been investigated. To prevent microbial contamination of the effluent from the reactor the nitrate-laden water treated was separated from the denitrifying culture with a 0.02 μm pore diameter membrane. Equal pressure was maintained across the membrane and nitrate was removed by molecular diffusion through the membrane and into the denitrifying culture. The system was operated with a hydrogenotrophic denitrification culture to circumvent the addition of an organic substrate to the water. Removal efficiencies ranging from 96% to 92% were achieved at influent concentrations ranging from 20 to 40 mg/L NO 3 − -N. The flux values achieved in this study were 2.7–5.3 g NO 3 − -N m −2 d −1 . The microporous membrane served as an effective barrier for preventing microbial contamination of the product water as evidenced by the effluent heterotrophic plate count of 9 (±3.5) CFU/mL. The hydrogenotrophic culture was analyzed using available 16S and 23S rRNA-targeted oligonucleotide probes. It was determined that the enrichment process selected for organisms belonging to the beta subclass of Proteobacteria. Further analysis of the hydrogenotrophic culture indicated that the organisms may belong to the β -3 subgroup of Proteobacteria and have yet to be identified as hydrogenotrophic denitrifiers.

Journal

Water ResearchElsevier

Published: Nov 1, 2002

References

  • Hydrogenotrophic denitrification with immobilized Alcaligenes eutrophus for drinking water treatment
    Chang, C.C.; Tseng, S.K.; Huang, H.K.
  • Nitrate removal from drinking water using a membrane-fixed biofilm reactor
    Fuchs, W.; Schatzmayr, G.; Braun, R.
  • Biological denitrification in a continuous flow membrane reactor
    Mansell, B.O.; Schroeder, E.D.
  • Biological denitrification of drinking water using autotrophic organisms with H 2 in a fluidized-bed reactor
    Kurt, M.; Dunn, I.J.; Bourne, J.R.
  • Autotrophic denitrification via a novel membrane-attached biofilm reactor
    Ho, C.M.; Tseng, S.K.; Chang, Y.J.
  • A novel hollow-fiber membrane biofilm reactor for autohydrogenotrophic denitrification of drinking water
    Lee, K-.C.; Rittman, B.E.

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