Tallman Island, NYC
Design Engineer:
Luis Carrio, P.E., Chief Process Development Section, NYC Dept. of Environmental Protection,
Bureau of Clean Water
Results:
Significantly lower Sludge Volume Index (SVIs), 12–20% reduced sludge yield
Media Installed:
92 modules with 3,750 ft2 of BioWeb fixed media, totaling 345,000 ft2
Tallman Island, NYC
This 10 MGD (million gallons per day) flow train of the 80 MGD plant was retrofitted with BioWeb in 1996 to enhance nitrification in short retention time basins. While operation using IFAS showed improved nitrification, especially significant is the documented improved settling characteristics and reduced sludge production.
Modules were removed in 2005 due to concerns relative to the integrity of the aluminum frames constructed by the contractor. This allowed for strength testing on media in service for 9 years. The hexagonal matrix provides for exceptional strength still in excess on 750 pounds per ft2.
The Colony • Tallman Island, NYC • Greensboro • National Pingtung, Taiwan • Windsor Locks • Ashfield • Green Cove Springs
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