This powerpoint presentation begins by providing a brief overview of the Cr(VI) regulatory horizon. Demonstration testing of reduction/coagulation/filtration (RCF) for hexavalent chromium removal is presented, along with residuals management and analysis. Study results indicate: ferrous sulfate reduced Cr(VI) concentrations from 100 ug/L to
less than 1 ug/L within 15 minutes;
aeration effectively oxidized the majority of the ferrous iron, even
6 minutes of aeration lowered ferrous concentrations to less than
0.08 mg/L;
runs conducted without aeration resulted in filter effluent ferrous
iron concentrations of less than 0.03 mg/L;
anionic polymer was effective in floc formation and backwash
water settling;
passive filtration for sludge dewatering is promising for this
application; and,
backwash water recycle did not negatively impact the RCF
process. Includes tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 1.9 MB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 24 |
| Published : | 11/01/2009 |
