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RECORD NUMBER: 17 OF 62

OLS Field Name OLS Field Data
Main Title Development of a Pilot Plant to Demonstrate Removal of Carbonaceous, Nitrogenous and Phosphorus Materials From Anaerobic Digester Supernatant and Related Process Streams.
Author Bennet, George E. ;
CORP Author FMC Corp., Santa Clara, Calif. Central Engineering Labs.
Year Published 1970
Report Number FWQA-14-12-414; OWRR-17070-FKA; 03453,; 17070-FKA-05/70
Stock Number PB-196 733
Additional Subjects ( Water pollution ; Phosphates) ; ( Sewage treatment ; Phosphates) ; ( Nitrogen inorganic compounds ; Sewage treatment) ; ( Packaged sewage plants ; Mobile equipment) ; Pilot plants ; Digesters ; Nutrients ; Chemical removal(Sewage treatment) ; Calcium oxides ; Precipitation(Chemistry) ; Ammonia ; Cost estimates ; Secondary sewage treatment
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB-196 733 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 82p
Abstract
Digester supernatant contains high concentrations of nitrogen and phosphorus. Also, poor quality supernatant discharged from an anaerobic digester can have an adverse effect on the overall efficiency of a wastewater treatment plant. The report discusses the building and demonstrating of a unique, trailer-mounted, and completely self-contained pilot plant. The pilot plant is designed to investigate the improvement of digester supernatant quality, with particular emphasis on the removal of nitrogen and phosphorus. The pilot plant treatment sequence consists of carbon dioxide removal via air-stripping, lime precipitation of phosphorus and carbonaceous particulate matter, and removal of nitrogen by packed-tower ammonia-stripping. The pilot plant was operated over a two-month period at a trickling filter plant where two-stage anaerobic digestion is practiced. It was found that 80-95% of supernatant phosphorus could be removed at a lime dosage equal to 50 pounds of hydrated lime per pound of phosphorus removed. Average ammonia-nitrogen removal was 82%, achieved at an air flow rate equal to 83,000 cubic feet of air per pound of NH3-N removed. Normal lime precipitation removed about one-half of the supernatant TOC, COD, AND Organic Nitrogen. The average decrease in suspended solids was 64%. (Author)