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RECORD NUMBER: 103 OF 158

OLS Field Name OLS Field Data
Main Title Phosphorus Removal Using Chemical Coagulation and a Continuous Countercurrent Filtration Process.
Author Bel, G. R. ; Libb, D. V. ; Lord, D. T. ;
CORP Author Johns-Manville Research and Engineering Center, Manville, N. J.
Year Published 1970
Report Number FWCA-14-12-154; FWCA-17010-EDO; 03454,; 17010-EDO-06/70
Stock Number PB-196 734
Additional Subjects ( Water pollution ; Phosphates) ; ( Sewage treatment ; Phosphates) ; ( Precipitation (Chemistry) ; Phosphorus inorganic acids) ; ( Sewage filtration ; Sewage treatment) ; ( Alums ; Sewage treatment) ; ( Coagulation ; Sewage treatment) ; Cost estimates ; Anion exchanging ; Polyelectrolytes ; Trickling filtration ; Clarification ; Biochemical oxygen demand ; Pilot plants ; Flocculation ; Nutrients ; Chemical removal(Sewage treatment) ; Secondary sewage treatment
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Status
NTIS  PB-196 734 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 63p
Abstract
A continuous precipitation and countercurrent filtration process was evaluated for the removal of phosphorus from municipal wastewater. Using alum and an anionic polyelectrolyte, the process was found to effectively reduce total phosphorus (TP), orthophosphate (OP) and condensed phosphate (CP) over a wide range of influent phosphorus concentrations. Preliminary work using jar tests established an alum dose of 200 mg/l (17.4 mg/l Al, molar ratio of Al1P is 27/31) as effective for removal of 90 per cent TP from the secondary clarifier effluent of a trickling filter plant. This removal efficiency could not be sustained with an alum dose of 200 mg/l when higher TP levels were encountered. Substantial reductions in final effluent total suspended solids (TSS) and 5-day biochemical oxygen demand (BOD5) were also obtained. The 200 mg/l alum dose was also found to be equally effective for removal of phosphorus from raw sewage and primary effluent with the added capability for removing substantial portions of the TSS and BOD5. Costs for a 1.0 MGD plant are estimated to be $264,000 for capital and 12.0 cents per 1000 gal for total operating cost. Ultimate disposal of the phosphorus-containing sludge could be achieved by a dewatering and landfill operation. (Author)