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2018 | 109 | 60-70
Article title

Computational Fluid Dynamics Modeling of Residence Time Distribution in a Field-Scale Horizontal Subsurface Flow Constructed Wetland with Palm Kernel Shell as Substrate

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EN
Abstracts
EN
The hydraulic performance of constructed wetlands is often compromised by hydraulic problems. Therefore, the development of an appropriate simulation model to reliably predict how various modifications of bed design and configurations might affect performance will facilitate the design of efficient systems. The aim of this research work is to determine distribution of residence time in a field-scale horizontal subsurface flow constructed wetland with Palm Kernel Shell as substrate. The governing equations of flow in porous media and transport of diluted species were solved using COMSOL Multiphysics 5.3a. The result was validated using experimental data and the model result showed good agreement with a correlation coefficient of 0.99. Alternative wetland designs were assessed for the same flow conditions. The results revealed that a two cell wetland improved short-circuiting flow paths.
Year
Volume
109
Pages
60-70
Physical description
Contributors
  • Department of Agriculture and Bioresources Engineering, Nnamdi Azikiwe University Awka, Nigeria
  • Department of Agricultural Engineering, Federal University of Technology, Owerri, Nigeria
  • Department of Agriculture and Bioresources Engineering, Nnamdi Azikiwe University Awka, Nigeria
  • Department of Agricultural Engineering, Federal University of Technology, Owerri, Nigeria
  • Department of Agriculture and Bioresources Engineering, University of Nigeria, Nsukka, Nigeria
References
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  • [2] Chazarenc, F., Merlin, G. and Gonthier, Y. (2003). Hydrodynamics of horizontal subsurface flow constructed wetlands. Ecol. Eng. 21; pp. 165-173.
  • [3] COMSOL Multiphysics Reference Manual Version 5.3a (2017) COMSOL AB, USA.
  • [4] Giralgi, D., Vitturi, M., Zaramella, M., Marion, A. and Iannelli, R. (2009) Hydrodynamics of vertical subsurface flow constructed wetlands: Tracer tests with rhodamine WT and numerical modelling. Ecol Eng 35(2); pp.265-273
  • [5] Johnson, K. D.; Martin, C. D.; Moshiri, G. A. and McCrory, W. C. (1999). Performance of a constructed wetland leachate treatment system at the Chunchula landfill, Mobile County, Alabama. In Constructed wetlands for the treatment of landfill leachates; Mulamoottil, G., McBean, E.A., Rovers, F., Eds.; CRC Press/Lewis Publishers: Boca Raton, FL, USA, 1999; pp.57-70.
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  • [8] Liwei, F., Reti, H., Wenxing, W., Zexiang, L., Zhiming, Y. (2008). Application of computational fluid dynamic to model the hydraulic performance of subsurface flow wetlands. J. Env. Sci., 20; pp.1415-1422.
  • [9] Persson, J., Somes, N. L. G., and Wong, T. H. F. (1999). Hydraulic efficiency of constructed wetlands and ponds. Water Sci. Technol. 40(3); pp. 291-300
  • [10] Persson, J. (2000). The hydraulic performance of ponds of various layouts. Urb. Wat., 2; pp. 243-250.
  • [11] Peterson, E. L., Harris, J. A., Wadha, L. C. (2000). CFD modelling pond dynamic processes. Aquacult. Eng., 23 (1-3); pp. 61-93.
  • [12] Tanner, C. C., Nguyen, M. L. and Sukias, J. P. S. (2005). Nutrient removal by a constructed wetland treating subsurface drainage from a grazed dairy pasture. Agric. Ecosyst. Environ. 105; pp. 145-162.
  • [13] Thackston, E. L., Shields Jr., F. D. and Schroeder, P. R. (1987). Residence time distribution of shallow basins. ASCE. J. Environ. Eng. 113; pp. 1319-1332.
  • [14] Williams, C. F.; and Nelson, S. D. (2011). Comparison of rhodamine-WT and bromide as a tracer for elucidating internal wetland flow dynamics. Ecol. Eng. 37; pp. 1492-1498.
Document Type
article
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.psjd-5955c23d-5d4c-48c9-9170-155c020ef570
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