Critical modeling parameters identified for 3D CFD modeling of rectangular final settling tanks for New York City wastewater treatment plants
| Autor: | K. Ramalingam, John Fillos, Savvas Xanthos, Allen Deur, Keith Beckmann, J. A. McCorquodale, M. Gong |
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| Rok vydání: | 2012 |
| Předmět: |
Engineering
Flocculation Environmental Engineering Waste management Nitrogen business.industry Environmental engineering Models Theoretical Computational fluid dynamics Waste Disposal Fluid Mixed liquor suspended solids Activated sludge Settling Computer Simulation New York City Sewage treatment Aeration business Effluent Water Pollutants Chemical Water Science and Technology |
| Zdroj: | Water Science and Technology. 65:1087-1094 |
| ISSN: | 1996-9732 0273-1223 |
| DOI: | 10.2166/wst.2012.944 |
| Popis: | New York City Environmental Protection is in the process of incorporating biological nitrogen removal (BNR) in its wastewater treatment plants (WWTPs) which entails operating the aeration tanks with higher levels of mixed liquor suspended solids (MLSS) than a conventional activated sludge process. The objective of this paper is to discuss two of the important parameters introduced in the 3D CFD model that has been developed by the City College of New York (CCNY) group: (a) the development of the ‘discrete particle’ measurement technique to carry out the fractionation of the solids in the final settling tank (FST) which has critical implications in the prediction of the effluent quality; and (b) the modification of the floc aggregation (KA) and floc break-up (KB) coefficients that are found in Parker's flocculation equation (Parker et al. 1970, 1971) used in the CFD model. The dependence of these parameters on the predictions of the CFD model will be illustrated with simulation results on one of the FSTs at the 26th Ward WWTP in Brooklyn, NY. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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