Record Display for the EPA National Library Catalog

RECORD NUMBER: 457 OF 1214

OLS Field Name OLS Field Data
Main Title Evaluation of Operating Parameters of Alumina Columns for the Selective Removal of Phosphorus from Waste-Waters and the Ultimate Disposal of Phosphorus as Calcium Phosphate.
Author Ame, L. L. ;
CORP Author Battelle-Northwest, Richland, Wash. Pacific Northwest Lab.
Year Published 1969
Report Number TWRC-AWTRL-8; FWPCA-14-12-413; 03612,; 17010-02/69
Stock Number PB-189 405
Additional Subjects ( Wastes(Sanitary engineering) ; Phosphates) ; Adsorption ; Alumina ; Sewage ; Calcium compounds ; Separation ; Sewage treatment ; Absorbers(Equipment) ; Columns(Process engineering) ; Beds(Process engineering)
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB-189 405 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 40p
Abstract
A synthetic secondary sewage effluent containing 10 to 30 mg/liter phosphate, 300 mg/liter bicarbonate, 112 mg/liter Cl and 50 mg/liter sulfate as anions and 130 mg/liter Na, 60 mg/liter Ca, 25 mg/liter each of K and Mg and 20 mg/liter ammonium as cations was used with 7.6 ml alumina columns to study the effects of various compositional changes on phosphorus removal. The phosphorus capacity was about half for the solution containing no Ca or Mg as compared to solutions containing them. Probably adsorption onto the alumina occurs partly as a calcium or magnesium phosphorus complex rather than as a simple phosphorus anion. Increasing the competing sulfate concentration in the influent solution to 4800 mg/liter showed little effect on phosphorus adsorption. Raising the pH of the synthetic sewage effluent to greater than 8.0 led to precipitation of calcium carbonate on the alumina grains which progressively lowered alumina phosphorus capacity. This problem was not encountered when using actual sewage effluent. It was found that alumina columns could be satisfactorily regenerated with NaOH. (WRSIC abstract)