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Language: English

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received November 18, 2007
Accepted March 5, 2009

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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CFD study on hydraulic performance of subsurface flow constructed wetland: Effect of distribution and catchment area

Liwei Fan^† Reti Hai¹ Zexiang Lu

College of Resource and Environment, Fujian Agricultural and Forestry University, Fujian 350-002, China ¹Center of Environmental Science and Technology, Beijing University of Chemical Technology, Beijing 100-029, China

fanlw@163.com

Korean Journal of Chemical Engineering, September 2009, 26(5), 1272-1278(7), 10.1007/s11814-009-0222-7

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Abstract

A subsurface flow constructed wetland (SSFW) was simulated by using a commercial computational fluid dynamic (CFD) code (Fluent 6.22, Fluent Inc.). The liquid residence time distribution in the SSFW was obtained by the particle trajectory model. The simulation confirmed that the effect of the distribution and/or catchment area on the hydraulic efficiency is significant. An inappropriate horizontal distribution and/or catchment area can result in poor hydraulic efficiency. The hydraulic efficiency of the SSFW with the vertical distribution and/or catchment area can be kept at a high level (above 0.898). The design of the vertical distribution and/or catchment area in the SSFW is better than that of the horizontal. From the point of view of the engineering design, a small dimension distribution and/or catchment area in the SSFW is advisable, which maintains a considerable hydraulic efficiency of the SSFW (above 0.840), but also benefits the increase of the purge area.

Keywords

Subsurface Flow Constructed Wetland Computational Fluid Dynamics Distribution Area Catchment Area Hydraulic Efficiency

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