Applying a novel autohydrogenotrophic hollow-fiber membrane biofilm reactor for denitrification of drinking water

Applying a novel autohydrogenotrophic hollow-fiber membrane biofilm reactor for denitrification... We conducted a series of pseudo-steady-state experiments on a novel hollow-fiber membrane biofilm reactor used for denitrification of oligotrophic waters, such as drinking water. We applied a range of nitrate loadings and hydrogen pressures to establish under what conditions the system could attain three goodness-of-performance criteria: partial nitrate removal, minimization of hydrogen wasting, and low nitrite accumulation. The hollow-fiber membrane biofilm reactor could meet drinking-water standards for nitrate and nitrite while minimizing the amount of hydrogen wasted in the effluent when it was operated under hydrogen-limited conditions. For example, the system could achieve partial nitrate removals between 39% and 92%, effluent nitrate between 0.4 and 9.1 mg N/l, effluent nitrite less than 1 mg N/l, and effluent hydrogen below 0.1 mg H 2 /l. High fluxes of nitrate and hydrogen made it possible to have a short liquid retention time (42 min), compared with 1–13 h in other studies with hydrogen used as the electron donor for denitrification. The fluxes and concentrations for hydrogen, nitrate, and nitrite obtained in this study can be used as practical guidelines for system design. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Water Research Elsevier

Applying a novel autohydrogenotrophic hollow-fiber membrane biofilm reactor for denitrification of drinking water

Water Research, Volume 36 (8) – Apr 1, 2002

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Publisher
Elsevier
Copyright
Copyright © 2002 Elsevier Science Ltd
ISSN
0043-1354
D.O.I.
10.1016/S0043-1354(01)00425-0
Publisher site
See Article on Publisher Site

Abstract

We conducted a series of pseudo-steady-state experiments on a novel hollow-fiber membrane biofilm reactor used for denitrification of oligotrophic waters, such as drinking water. We applied a range of nitrate loadings and hydrogen pressures to establish under what conditions the system could attain three goodness-of-performance criteria: partial nitrate removal, minimization of hydrogen wasting, and low nitrite accumulation. The hollow-fiber membrane biofilm reactor could meet drinking-water standards for nitrate and nitrite while minimizing the amount of hydrogen wasted in the effluent when it was operated under hydrogen-limited conditions. For example, the system could achieve partial nitrate removals between 39% and 92%, effluent nitrate between 0.4 and 9.1 mg N/l, effluent nitrite less than 1 mg N/l, and effluent hydrogen below 0.1 mg H 2 /l. High fluxes of nitrate and hydrogen made it possible to have a short liquid retention time (42 min), compared with 1–13 h in other studies with hydrogen used as the electron donor for denitrification. The fluxes and concentrations for hydrogen, nitrate, and nitrite obtained in this study can be used as practical guidelines for system design.

Journal

Water ResearchElsevier

Published: Apr 1, 2002

References

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