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The City of Raleigh's Neuse River Wastewater Treatment Plant is a 60 mgd advanced treatment facility that consistently meets stringent NPDES permit limits. In response to water quality problems in the summer of 1995 in the Lower Neuse River, the City of Raleigh and Hazen and Sawyer
conducted a denitrification filter pilot study at the plant in 1996 and 1997 using one of the existing effluent filters as a denitrification filter by adding methanol to the filter influent. The results of the pilot study indicated that reduction of total nitrogen is possible by adding methanol
to an existing dual media effluent filter. Due to the positive results achieved in the pilot study, the City of Raleigh proceeded with modifications to their existing effluent filters to provide denitrification. Construction was completed in late 2000. The project cost approximately 4 million
and included replacing dual media with monomedia, increasing media depth from 2.5 feet to 4 feet, and reprogramming the filter PLCs to automatically perform nitrogen release cycles. The filter upgrade at the Neuse River WWTP has resulted in reduced total nitrogen in the plant's effluent.
Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed. WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access.