UPGRADING FOR TOTAL NITROGEN REMOVAL WITH A POROUS MEDIA IFAS SYSTEM
Abstract:The Westerly, Rhode Island wastewater treatment facility (WWTF) is an activated sludge plant with a monthly design average daily flow of 3.3 million gallons per day (MGD). Construction and commissioning of an integrated fixed-film activated sludge (IFAS) process completed in September 2003, upgraded the biological process at the facility from carbonaceous BOD5 removal only, to include total nitrogen removal. The IFAS system met the treatment performance criteria soon after commissioning and startup and has performed well to date with total effluent nitrogen concentrations averaging approximately 5 mg/l.
Document Type: Research Article
Publication date: 2004-01-01
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