This slide presentation outlines the use of internal ecirculation to improve perchlorate reduction in a fixed biofilm process. Objectives and hypothesis include:
use flow regime to improve perchlorate reduction in a biofilm reactor;
determine feasibility of a biofilm perchlorate reduction process
under conditions typical of natural waters;
internal flow recirculation will improve packed biofilm reactor
performance by
increasing turbulent (dispersive) transport of perchlorate at low
concentration and
producing more uniform biofilm distribution in reactor media. Materials and methods are given for: biofilm reactor speciations; inoculum for biofilm reactors; and, synthetic groundwater influent for biofilm reactors. Conclusions indicated that:
complete reduction of dilute influent perchlorate (10 µg/L) can be
sustained in a fixed biofilm process, recirculation had no effect on
reduction of low influent perchlorate;
internal flow recirculation improved reactor response time to
increased perchlorate loading, possibly due to more uniform
biomass distribution; and,
tracer studies indicated that the plug flow reactor had significant
short-circuiting, which was consistent with the rise in effluent
perchlorate. Includes table, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 830 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 21 |
| Published : | 06/01/2006 |
