||Full-Scale Raw Wastewater Flocculation with Polymers.
Frees, Paul V. ;
Hick, Edward ;
||District of Columbia Dept. of Sanitary Engineering, Washington.
||FWPCA-WPRD-53-01-67; EPA-17050-EJB; 12073,; 17050-EJB-11/70
( Sewage treatment ;
( Flocculants ;
Performance evaluation ;
Suspended sediments ;
Sludge disposal ;
Biochemical oxygen demand ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||High molecular-weight organic polyelectrolytes (polymers) have been used successfully to flocculate raw wastewater and to increase the removal of pollutants from the wastewater during primary sedimentation. At present, however, a satisfactory method for predicting the effectiveness of a particular polymer for flocculating solids in a specific wastewater is not available. Three polymers, Dow's anionic A-21 modified with cationic C-31, Hercules' cationic Reten 210, and Calgon's anionic ST 269 with a clay builder, were added to raw wastewater in 240 MGD tests of raw wastewater flocculation. The objectives of polymer flocculation of the raw wastewater were to increase solid capture in the primary tanks, reduce the BOD load to aeration, and permit recycle of the elutriate to the plant's influent. Polymer treatment of raw wastewater did not improve the solids capture in elutriation or permit continuous elutriate recycle.
||Paper copy also available from GPO $0.60 as EPA17050EJB11/70.
||Presents a field study of the effectiveness of high molecular weight polyelectrolytes.
|NTIS Title Notes
||Water pollution control research series.
|PUB Date Free Form
||PC A04/MF A01