AWWA ACE71025

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 toless than 1 ug/L within 15 minutes;aeration effectively oxidized the majority of the ferrous iron, even6 minutes of aeration lowered ferrous concentrations to less than0.08 mg/L;runs conducted without aeration resulted in filter effluent ferrousiron concentrations of less than 0.03 mg/L;anionic polymer was effective in floc formation and backwashwater settling;passive filtration for sludge dewatering is promising for thisapplication; and,backwash water recycle did not negatively impact the RCFprocess. Includes tables, figures.

Product Details

Edition:

Vol. - No.

Published:

11/01/2009

Number of Pages:

24

File Size:

1 file , 1.9 MB