The discharge of nitrogen in wastewater treatment plant effluent has been identified as a receiving water quality issue throughout the United States and in the European Community. Regulatory agencies are evaluating discharge limits for total nitrogen (TN) as low as 3 to 5 mg/l. To attain these limits at treatment plants with little or no space for expansion, technologies which can remove large quantities of nitrogen with relatively small space requirements are required. Biological upflow fluidized bed (BFB) technology appears to be well suited to these regions. This paper describes the results of a demonstration project using a fluidized bed reactor. The reactor was operated at a flow rate of 15 l/s and an average daily loading of 1843 kg NO3/1000 m3/d and maximum loadings of 6407 kg NO3/1000 m3/d. At steady-state conditions, effluent total nitrogen concentrations averaged 2.5 mg/l over a temperature range of 11 to 25°C. At high nitrate loading rates, effluent total nitrogen concentrations averaged 4.1 mg/l. Approximately 3 mg of methanol per mg of influent nitrate was used as a carbon source. Reactor empty bed contact time averaged 5.7 minutes.
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Research Article|
July 01 1997
Biological upflow fluidized bed denitrification reactor demonstration project - Stamford, CT, USA
Jeannette Semon;
Jeannette Semon
*City of Stamford, WPCD, Harbor View Ave., Stamford, CT 06902, USA
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Thomas Sadick;
Thomas Sadick
**CH2M Hill, 11818 Rock Landing Drive, Suite 200, Newport News, VA 23606, USA
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Dennis Palumbo;
Dennis Palumbo
*City of Stamford, WPCD, Harbor View Ave., Stamford, CT 06902, USA
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Marylee Santoro;
Marylee Santoro
*City of Stamford, WPCD, Harbor View Ave., Stamford, CT 06902, USA
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Peter Keenan
Peter Keenan
**CH2M Hill, 11818 Rock Landing Drive, Suite 200, Newport News, VA 23606, USA
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Water Sci Technol (1997) 36 (1): 139–146.
Citation
Jeannette Semon, Thomas Sadick, Dennis Palumbo, Marylee Santoro, Peter Keenan; Biological upflow fluidized bed denitrification reactor demonstration project - Stamford, CT, USA. Water Sci Technol 1 July 1997; 36 (1): 139–146. doi: https://doi.org/10.2166/wst.1997.0032
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