Abstract

The H 2-based membrane biofilm reactor was used to remove nitrate from synthetic ion-exchange brine at NaCl concentrations from ∼3 to 30 g/L. NaCl concentrations below 20 g/L did not affect the nitrate removal flux as long as potassium was available to generate osmotic tolerance for high sodium, the H 2 pressure was adequate, and membrane fouling was eliminated. Operating pHs of 7-8 and periodic citric acid washes controlled membrane fouling and enabled reactor operation for 650 days. At 30 psig H 2 and high nitrate loading rates of 15 to 80 g/m 2 d, nitrate removal fluxes ranged from 2.5 to ∼6 g/m 2 d, which are the highest fluxes observed when treating 30 g/L IX brine. However, percent removals were low, and the H 2 pressure probably limited the removal flux.

Original languageEnglish (US)
Pages (from-to)100-104
Number of pages5
JournalWater Science and Technology
Volume65
Issue number1
DOIs
StatePublished - 2012

Fingerprint

Biofilms
brine
biofilm
Nitrates
ion exchange
Ion exchange
Fluxes
nitrate
membrane
Membranes
Membrane fouling
fouling
Reactor operation
citric acid
Citric acid
Potassium
potassium
tolerance
Sodium
sodium

Keywords

  • Flux
  • Membrane biofilm reactor
  • NaCl
  • Nitrate removal

ASJC Scopus subject areas

  • Environmental Engineering
  • Water Science and Technology

Cite this

Effect of NaCl on nitrate removal from ion-exchange spent brine in the membrane biofilm reactor (MBfR). / Van Ginkel, Steven W.; Kim, Bi O.; Yang, Ziming; Sittmann, Robby; Sholin, Mark; Micelli, Joe; Rittmann, Bruce.

In: Water Science and Technology, Vol. 65, No. 1, 2012, p. 100-104.

Research output: Contribution to journalArticle

Van Ginkel, Steven W. ; Kim, Bi O. ; Yang, Ziming ; Sittmann, Robby ; Sholin, Mark ; Micelli, Joe ; Rittmann, Bruce. / Effect of NaCl on nitrate removal from ion-exchange spent brine in the membrane biofilm reactor (MBfR). In: Water Science and Technology. 2012 ; Vol. 65, No. 1. pp. 100-104.
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AU - Sholin, Mark

AU - Micelli, Joe

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AB - The H 2-based membrane biofilm reactor was used to remove nitrate from synthetic ion-exchange brine at NaCl concentrations from ∼3 to 30 g/L. NaCl concentrations below 20 g/L did not affect the nitrate removal flux as long as potassium was available to generate osmotic tolerance for high sodium, the H 2 pressure was adequate, and membrane fouling was eliminated. Operating pHs of 7-8 and periodic citric acid washes controlled membrane fouling and enabled reactor operation for 650 days. At 30 psig H 2 and high nitrate loading rates of 15 to 80 g/m 2 d, nitrate removal fluxes ranged from 2.5 to ∼6 g/m 2 d, which are the highest fluxes observed when treating 30 g/L IX brine. However, percent removals were low, and the H 2 pressure probably limited the removal flux.

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