Biological Upflow Fluidized Bed Denitrification Reactor Demonstration Project-Stamford, Ct.

by Jeannette Semon, (M.ASCE), WPCD, Stamford, United States,
Thomas Sadick, WPCD, Stamford, United States,
Dennis Palumbo, WPCD, Stamford, United States,
Richard Schede, WPCD, Stamford, United States,
Marylee Santoro, WPCD, Stamford, United States,
Marvin Schneider, WPCD, Stamford, United States,
Steven Lesando, WPCD, Stamford, United States,

Document Type: Proceeding Paper

Part of: Critical Issues in Water and Wastewater Treatment


Results of a demonstration project using a biological upflow fluidized bed reactor to remove nitrogen from wastewater treatment plant effluent are described. The reactor was operated at a flow rate of 15.14 L/s and a loading of 2371 kg NO3/1000 m3/d. Problems were encountered with the mechanical systems during start-up, but they were resolved and the system has performed extremely well throughout the test period. Performance data obtained from this project are very encouraging. Nitrate removal averaged 97% with effluent total nitrogen concentrations between 1.5 to 2.0 mg/l at 15?C. Approximately 3 mgs of methanol per mg of influent nitrate is used as a carbon source. Reactor empty bed contact time averaged 5.5 minutes. It appears that this type of process can be used successfully to remove nitrogen to meet low discharge concentrations at relatively low temperatures.

Subject Headings: Fluidized bed technology | Wastewater treatment plants | Nutrient pollution | Nitrogen | Biological processes | Waste treatment | Nitrates

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