Anoxic and aerobic batch reactor assays using a two-by-two factorial design were developed to determine the potential activity of autotrophic denitrification and heterotrophic nitrification in biological nutrient removal (BNR) activated sludge systems, especially those accomplishing simultaneous BNR (SBNR). Results from the application of these assays to three full scale closed loop bioreactors previously documented to be accomplishing SBNR demonstrated that these activities were minimal in comparison with the conventionally recognized activities of heterotrophic denitrification and autotrophic nitrification. Activity within the mixed liquor consistent with current theories for phosphorus accumulating organisms (PAOs) was also observed. Along with other observations, this suggests the presence of PAOs in the facilities studied.
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Research Article|
July 01 2002
Evaluation of autotrophic denitrification, heterotrophic nitrification, and PAOs in full scale simultaneous biological nutrient removal sysyems
H.X. Littleton;
H.X. Littleton
*Department of Environmental Science, Rutgers University, 14 College Farm Rd, New Brunswick, NJ 08901, USA
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G.T. Daigger;
G.T. Daigger
**CH2M Hill, 6060 South Willow Drive, Greenwood Village, CO 80111-5142, USA
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P.F. Strom;
P.F. Strom
*Department of Environmental Science, Rutgers University, 14 College Farm Rd, New Brunswick, NJ 08901, USA
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R.M. Cowan
R.M. Cowan
*Department of Environmental Science, Rutgers University, 14 College Farm Rd, New Brunswick, NJ 08901, USA
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Water Sci Technol (2002) 46 (1-2): 305–312.
Citation
H.X. Littleton, G.T. Daigger, P.F. Strom, R.M. Cowan; Evaluation of autotrophic denitrification, heterotrophic nitrification, and PAOs in full scale simultaneous biological nutrient removal sysyems. Water Sci Technol 1 July 2002; 46 (1-2): 305–312. doi: https://doi.org/10.2166/wst.2002.0493
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