Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
권호 표지
DOI QR코드

DOI QR Code

Evaluation of Hydraulic Behavior within Parallel arranged Upflow Sedimentation Basin Using CFD Simulation (I) - The influence of feed water inequity-

CFD를 이용한 병열 배열형 상향류식 침전지 수리해석에 관한 연구(I) - 침전지 내 유입유량 불균등 영향 조사 -

  • Received : 2013.02.28
  • Accepted : 2013.08.14
  • Published : 2013.08.15
Download PDF
⟨ Previous Next ⟩

Abstract

In order to investigate the influence of feed water inequity on the settling performance for parallel arranged upflow sedimentation basin in domestic G_WTP(Water Treatment Plant), CFD(Computational Fluid Dynamics) simulation were employed and ADV(Acoustic Doppler Velocimeter) measurements were carried out. From the results of both CFD simulations and ADV measurements, the differences among inlet flow rates to each inlet structure make turbulent energy dissipation uneven overall sedimentation basin. Especially local velocities in the near of both side wall were observed over the design overflow rate(74.4 mm/min). Also, it was confirmed that this inequity of inlet flow would exert an serious influence on the turbidity of settled water which is out from 8 troughs. Even though experimental velocities in full scale basin about 20% higher than the simulated, the results of ADV measurement were in good accordance with those of CFD simulations.

Keywords

References

  1. S. Kawamura, (1991), Integrated Design of Water Treatment Facilities, 2nd ed., John Wiley & Sons, Inc.
  2. Prabhata K. Swamee and Aditya Tyagi (1996) "Design of Class-I Sedimention Tanks." ASCE, Journal of Environmental Engineering, Vol. 122, No1, pp.71-73. https://doi.org/10.1061/(ASCE)0733-9372(1996)122:1(71)
  3. Salem A.I, Okoth G, Thoming J. (2011) "An approach to improve the separation of solid- liquid suspensions in inclined plate settler: CFD simulation and experimental validation" Water Research, Vol.45, No.11, pp.3541-3549. https://doi.org/10.1016/j.watres.2011.04.019
  4. Raimund Burger, Stefan Diehl, Sebastian Faras, Ingmar Nopens (2012), "On reliable and unreliable numerical methods for the simulation of secondary settling tanks in wastewater treatment" Computers and Chemical Engineering, Vol 41, pp.93-105 https://doi.org/10.1016/j.compchemeng.2012.02.016
  5. Lawler, D.F., O'Melia, C.R., and Tobiason, J.E.,(1980) "Integral Water Treatment Plant Design: From Particle Size to Plant Performance," Chapter 16 in Particulates in Water, Kavanaugh and Leckie, editors, Advances in Chemistry Series, #189, American Chemical Society, pp. 353-388.
  6. Laine, S., Phan, L., Pellarin, P., Robert, P., (1999) "Operating diagnosis on a floccurator-settling tank using FLUENT CFD software" Water Science & Technology, Vol.39, No.4, pp.155-162.
  7. Fatemeh Rostami, Mahdi Shahokhi, Md Azlin Md Said, Rozi Abdulla, Syafalni, (2011) "Numerical Modeling on inlet aperture effects on flow pattern in primary settling tank" Applied Mathematical Modeling, Vol. 35, pp.3012-3020. https://doi.org/10.1016/j.apm.2010.12.007
  8. M. Al-Sammarraee, A. Chan, S.M. Salim, U.S. Mahabaleswar, (2009) "Large-eddy simulations of particle sedimentation in a longitudinal sedimentation basin of a water treatment plant. Part 1: Particle settling performance" Chemical Engineering Journal, Vol.152, pp.307-314. https://doi.org/10.1016/j.cej.2009.04.062
  9. Athanasia M. Goula, Margaritis Kostoglou, Thodoris D. Karapantsios, Anastasios I. Zouboulis, (2008) "A CFD methodology for the design of sedimentation tanks in potable water treatment, Case study: The influence of a feed flow control baffle" Chemical Engineering Journal, Vol.140, pp.110-121. https://doi.org/10.1016/j.cej.2007.09.022

Cited by

  1. A Study on Prediction of Sedimentation Efficiency for Sedimentation Basin using Lagrangian Method vol.39, pp.5, 2017, https://doi.org/10.4491/KSEE.2017.39.5.229