University of Surrey

Test tubes in the lab Research in the ATI Dance Research

Three-dimensional computational fluid dynamic modelling of a facultative lagoon

Salter, HE, Ta, CT, Ouki, SK and Williams, SC (2000) Three-dimensional computational fluid dynamic modelling of a facultative lagoon Water Science and Technology, 42 (10-11). pp. 335-342.

Full text not available from this repository.


A series of facultative lagoons operated by Thames Water treating industrial wastewater in Thailand were found to be performing poorly, particularly with respect to the removal of biological oxygen demand (BOD). A review of the design parameters for the site found that all the lagoons are of a sufficient area for the flow and BOD load. However, observations of the lagoons suggested that there may be significant hydraulic short-circuiting. Computational fluid dynamics (CFD) modelling was therefore carried out on one of the lagoons to establish the hydraulic regime. Two-consecutive simulations were carried out, both with and without baffles; the first to establish steady flow conditions, and the second using a chemical species transport model to obtain the residence time distribution (RTD). The results of the modelling indicate that the lagoons do currently suffer from significant short-circuiting, and large dead-zones are present. The installation of baffles in the CFD model improved the plug-flow characteristics of the lagoons, substantially reducing the short-circuiting and the size of the dead-zones. It has therefore been concluded that the installation of baffles in the lagoons will lead to an improvement in their performance, by increasing the retention time of the system.

Item Type: Article
Divisions : Surrey research (other units)
Authors :
Salter, HE
Ta, CT
Williams, SC
Date : 1 December 2000
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 13:33
Last Modified : 25 Jan 2020 00:06

Actions (login required)

View Item View Item


Downloads per month over past year

Information about this web site

© The University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom.
+44 (0)1483 300800