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Operating Experience of the First and Largest Low Level Nitrogen Removal Facility in Long Island Sound

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Abstract:

Located on the Western reach of long Island Sound near New York City, the Stamford, CT, Water Pollution Control Authority (WPCA) was the first municipality in CT to begin experimenting with nitrogen removal in the early 1990s and conducted a study funded by the U.S. Environmental Protection Agency (EPA) to demonstrate new nitrogen removal technology. This project was followed in the late 90's by plant improvements to further enhance nitrogen removal (50 to 60% nitrogen removal). The Stamford WPCA recently completed and commissioned a $105M nitrogen upgrade and expansion to 90,840 m3/day (24 mgd). About $50M was associated with nitrogen removal processes. Designed to achieve nitrogen removal on the order of 80 to 90% to levels of 4 mg/L Total nitrogen (TN) or less, the upgraded plant has been operating in the high level nitrogen removal mode since the spring of 2006.

Keywords: ANOXIC ZONES; BIOLOGICAL NUTRIENT REMOVAL; LONG ISLAND SOUND; NITROGEN

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193317707X256928

Publication date: November 1, 2007

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  • Water Practice™ publishes peer-reviewed articles and reports focusing on applied water studies. Topics include monitoring, facility operations and maintenance, management, policy, and other issues of interest and concern to water practitioners. The Journal publishes on a monthly to bi-monthly basis and is available online only.
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