AWWA ACE63077

The biological reduction of bromate (BrO₃^-) in a hydrogen based membrane biofilm reactor(MBfR) was investigated to determine if bromate could be reduced below the MCL of 10µg/L, and the inhibitory impacts of nitrate and bromate concentration on bromate reduction.Reduction of bromate to below the 10 µg/L MCL was achieved with an influent nitrateconcentration of 5 mgN/L and influent bromate concentrations ranging from 150 µg/L to 1,500µg/L. Pseudo-steady state experiments were conducted to examine the influence of nitrate andbromate on bromate reduction. Nitrate was shown to inhibit bromate reduction at concentrationsas low as 0.5 mgN/L. Bromate reduction followed Monod-type kinetics, with increased bromatereduction being achieved until an effluent bromate of 15 mg/L was reached. Over an extendedperiod of exposure to bromate concentrations greater than 15 mg/L, bromate appeared to exhibitan inhibitory effect on bromate reduction. The production of bromite, an intermediate ofbromate reduction, may be responsible for this inhibition. Includes 15 references, table, figures.

Product Details

Edition:

Vol. - No.

Published:

06/01/2006

Number of Pages:

11

File Size:

1 file , 310 KB