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MBBR Pilot Study for Tertiary Nitrification of HPOAS Wastewater at Harrisburg AWTF

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A pilot study utilizing moving bed biofilm reactor (MBBR) process was conducted for tertiary nitrification of effluent from the existing pure oxygen activated sludge process. The pilot consisted of two MBBR reactors in series, each containing biofilm carriers. This study was conducted during December 2005–June 2006 with temperature range of 9.4–21.8°C. The nine test periods were designed to evaluate effect of process parameters such as biofilm carrier fill fractions, flow rates and corresponding hydraulic retention times on removal of NH3-N. For the biofilm carrier fill fractions selected for demonstration, the target NH3-N concentrations of less than 3 mg/l and 1 mg/l were achieved. The start-up conditions, NH3-N removal efficiencies and loading rates are discussed along with performance of each of the two stages.

Document Type: Research Article


Publication date: 2008-01-01

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