DEMONSTRATION OF LOW TEMPERATURE NITRIFICATION WITH A SHORT SRT
Authors: Kos, Peter; Head, Melanie A.; Oleszkiewicz, Jan; Warakomski, Alphonse
Source: Proceedings of the Water Environment Federation, WEFTEC 2000: Session 51 through Session 60 , pp. 338-347(10)
Publisher: Water Environment Federation
Abstract:The InNitri® 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
Publication date: January 1, 2000
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