Record Display for the EPA National Library Catalog


Main Title Ferric Chloride and Organic Polyelectrolytes for The Removal of Phosphorus.
Author Green, Otto ; VanDam, Doris ; LaBeau, Bernard ; Campbell, Terry L. ; Daniels., Stacy L. ;
CORP Author Grand Rapids Wastewater Treatment Plant, Mich.;National Environmental Research Center, Cincinnati, Ohio.
Year Published 1973
Report Number EPA-11010-ENK; EPA/670/2-73-103;
Stock Number PB-239 866
Additional Subjects Chemical removal(Sewage treatment) ; Inorganic phosphates ; Sewage treatment ; Waste water ; Activated sludge treatment ; Precipitation(Chemistry) ; Sludge disposal ; Automatic control ; Efficiency ; Incinerators ; Iron chlorides ; Flocculants ;
Library Call Number Additional Info Location Last
NTIS  PB-239 866 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 119p
The primary objective of this project was to demonstrate the feasibility and economic practicability of chemical removal of phosphorus from municipal wastewater in the 44 mgd (166,500 cu m) activated sludge plant at Grand Rapids, MI. The full-scale system for chemical phosphorus removal was implemented to meet water quality criteria established by the state of Michigan. Ferric chloride and polymer flocculant were introduced into the raw wastewater flow by automated systems. During the period of best performance when split dosage of chemicals was employed, residual phosphorus concentrations of less than 1 mg/l could be obtained. Total phosphorus concentrations in the final effluent were related to final clarifier overflow rates. The nature of the chemically precipitated sludge evolved by the process was also evaluated relative to further chemical conditioning, vacuum filtration and incineration.