TY - JOUR
T1 - Effect of pH on nitrate and selenate reduction in flue gas desulfurization brine using the H 2-based membrane biofilm reactor (MBfR)
AU - Van Ginkel, Steven W.
AU - Yang, Ziming
AU - Kim, Bi O.
AU - Sholin, Mark
AU - Rittmann, Bruce
PY - 2011/7/4
Y1 - 2011/7/4
N2 - Increased tightening of air regulations is leading more electric utilities to install flue gas desulfurization (FGD) systems. These systems produce brine containing high concentrations of nitrate, nitrite, and selenate which must be removed before discharge. The H 2-based membrane biofilm reactor (MBfR) was shown to consistently remove nitrate, nitrite, and selenate at high efficiencies. The maximum selenate removal flux reached 362 mg Sem -2d -1 and was higher than that observed in earlier research, which shows continual improvement of the biofilm for selenate reduction. A low pH of 6.8 inhibited precipitation when treating actual FGD brine, yet did not inhibit removal. SO 4 2- was not removed and therefore did not compete with nitrate, nitrite, and selenate reduction for the available H 2.
AB - Increased tightening of air regulations is leading more electric utilities to install flue gas desulfurization (FGD) systems. These systems produce brine containing high concentrations of nitrate, nitrite, and selenate which must be removed before discharge. The H 2-based membrane biofilm reactor (MBfR) was shown to consistently remove nitrate, nitrite, and selenate at high efficiencies. The maximum selenate removal flux reached 362 mg Sem -2d -1 and was higher than that observed in earlier research, which shows continual improvement of the biofilm for selenate reduction. A low pH of 6.8 inhibited precipitation when treating actual FGD brine, yet did not inhibit removal. SO 4 2- was not removed and therefore did not compete with nitrate, nitrite, and selenate reduction for the available H 2.
KW - Flue gas desulfurization
KW - Hydrogen gas
KW - Membrane biofilm reactor (MBfR)
KW - Nitrate
KW - Nitrite
KW - Selenate
UR - http://www.scopus.com/inward/record.url?scp=79955640139&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79955640139&partnerID=8YFLogxK
U2 - 10.2166/wst.2011.438
DO - 10.2166/wst.2011.438
M3 - Article
C2 - 22049720
AN - SCOPUS:79955640139
SN - 0273-1223
VL - 63
SP - 2923
EP - 2928
JO - Water Science and Technology
JF - Water Science and Technology
IS - 12
ER -