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Using pH and ORP to Optimize Phased Nitrfication-Denitrfication Operation

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Abstract:

The City of Bozeman, Montana (pop. 36,000) recently converted the operation of its complete mix activated sludge aeration basins to plug flow basins operating in a phased nitrification-denitrification mode. Operation in phased nitrification denitrification mode has reduced the plant's effluent total nitrogen by 40% without sacrificing ammonia removal. Sludge volume index values also dropped slightly with this modification. Chlorine use for filament control and disinfection has dropped from 52 tons per year to 32 tons per year. The total capital cost for project implementation was 180,000. The process uses pH and ORP probes to control and optimize nitrogen removal efficiency.

Keywords: denitrification; nitrification; process control

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864709793956248

Publication date: January 1, 2009

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  • 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 These proceedings are not peer reviewed.

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