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DEMONSTRATION OF LOW TEMPERATURE NITRIFICATION WITH A SHORT SRT

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Abstract:

The InNitriĀ® nitrification process/flowsheet was developed to provide an inexpensive alternative for plants in the northern climates which need to upgrade their air or pure oxygen activated sludge process for year-round nitrification or nitrogen removal. In this process/flowsheet supplemental nitrifiers are added daily to the activated sludge process to replenish nitrifiers removed with the wasted activated sludge. The supplemental nitrifiers are grown in a separate small side-stream aeration tank using either ammonia available in the digested sludge dewatering liquid and in the digester supernatant or commercial ammonia. The paper presents a description of this process/flowsheet, the theoretical background and results of modeling, results of laboratory testing, and a cost evaluation to retrofit a typical wastewater treatment plant.

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864700784545676

Publication date: January 1, 2000

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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 These proceedings are not peer reviewed.

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