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Performance of Grease Abatement Devices for Removal of Fat, Oil, and Grease |
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| Authors: | Tarek N Aziz Leon M Holt Kevin M Keener John W Groninger Joel J Ducoste |
| Affiliation: | 1Teaching Assistant Professor, Dept. of Civil, Construction, and Environmental Engineering, North Carolina State Univ., Raleigh, NC (corresponding author). 2Retired, 3509 Cattlet Farm Rd., Wake Forest, NC 27587; formerly, Pretreatment Manager, Cary, NC. 3Associate Professor, Dept. of Food Science, Purdue Univ., Food Science Bldg., Rm. 3215, 745 Agriculture Mall Dr., West Lafayette, IN 47907–2009. 4Associate Professor, Dept. of Forestry, Southern Illinois Univ., Mailcode 4411, Carbondale, IL 62901–4411. 5Associate Professor, Dept. of Civil Construction and Environmental Engineering, North Carolina State Univ., Raleigh, NC. |
| Abstract: | This study assessed the performance of a conventional grease abatement device and the impact of internal geometry modifications on fat, oil, and grease (FOG) removal efficiency. Analysis was performed using experimental results and computational fluid dynamics (CFD) on alternative inlet, outlet, and baffle wall designs. Numerical and experimental results indicated that the conventional two-compartment design leads to substantial FOG short circuiting when operated at a 20-min hydraulic retention time (HRT). Alterations to the inlet configuration and baffle wall arrangement yielded FOG removal enhancements with the 20-min HRT that approached removal performance levels obtained with the standard configurations at the 1-h HRT. CFD simulations effectively reproduced performance trends observed on the lab-scale with the exception of simulations using a distributive inlet tee, where CFD over predicted the removal performance. |
| Keywords: | Wastewater management Oils Abatement and removal Separation Sanitary sewers Computational fluid dynamics technique |