The biological reduction of bromate (BrO<sub>3</sub><sup>-</sup>) in a hydrogen based membrane biofilm reactor
(MBfR) was investigated to determine if bromate could be reduced below the MCL of 10
µg/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 nitrate
concentration of 5 mgN/L and influent bromate concentrations ranging from 150 µg/L to 1,500
µg/L. Pseudo-steady state experiments were conducted to examine the influence of nitrate and
bromate on bromate reduction. Nitrate was shown to inhibit bromate reduction at concentrations
as low as 0.5 mgN/L. Bromate reduction followed Monod-type kinetics, with increased bromate
reduction being achieved until an effluent bromate of 15 mg/L was reached. Over an extended
period of exposure to bromate concentrations greater than 15 mg/L, bromate appeared to exhibit
an inhibitory effect on bromate reduction. The production of bromite, an intermediate of
bromate reduction, may be responsible for this inhibition. Includes 15 references, table, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 310 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 11 |
| Published : | 06/01/2006 |
