Effect of Step Height on the Aeration Efficiency of Cascade Aerator System Using Particle Image Velocimetry

A. Azman, Mohd Hafiz Zawawi, N. H. Hassan, A. Abas, N. A. Razak, A. Z.A. Mazlan, M. A.Z. Mohd Remy Rozainy

Research output: Contribution to journalConference article

Abstract

Aeration is an important parameter in water filtration system as it allows the transfer of oxygen to water through turbulence effect which subsequently increases air entrainment in the water. For water treatment application, aeration efficiency is measured to ensure continuous re-oxygenation of the unfiltered water. Aside from aeration, this paper also studies the flow patterns through the use of particle image velocimetry (PIV) setup. Through the use of real scale down physical model laboratory study is performed using PIV to obtain the velocity profile. These velocity profiles will then be used to calculate the aeration efficiency of the water in a cascade aerator system. Based on the findings, the aeration efficiency obtained from the PIV experiment has a maximum value at the lowest point of the cascade aerator system with a value of 0.0139 due to increase in mass flow rate as it moves through the steps with velocity of 0.418 m/s. Therefore, in the design of a cascade aerator system, it is advisable to increase the number of steps since it will increase the aeration efficiency of the system.

Original languageEnglish
Article number04005
JournalMATEC Web of Conferences
Volume217
DOIs
Publication statusPublished - 17 Oct 2018
Event2018 International Conference on Vibration, Sound and System Dynamics, ICVSSD 2018 - Penang, Malaysia
Duration: 20 Aug 2018 → …

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Velocity measurement
Water
Water aeration
Water filtration
Air entrainment
Oxygenation
Water treatment
Flow patterns
Turbulence
Flow rate
Oxygen
Experiments

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Engineering(all)

Cite this

Azman, A. ; Zawawi, Mohd Hafiz ; Hassan, N. H. ; Abas, A. ; Razak, N. A. ; Mazlan, A. Z.A. ; Mohd Remy Rozainy, M. A.Z. / Effect of Step Height on the Aeration Efficiency of Cascade Aerator System Using Particle Image Velocimetry. In: MATEC Web of Conferences. 2018 ; Vol. 217.
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Effect of Step Height on the Aeration Efficiency of Cascade Aerator System Using Particle Image Velocimetry. / Azman, A.; Zawawi, Mohd Hafiz; Hassan, N. H.; Abas, A.; Razak, N. A.; Mazlan, A. Z.A.; Mohd Remy Rozainy, M. A.Z.

In: MATEC Web of Conferences, Vol. 217, 04005, 17.10.2018.

Research output: Contribution to journalConference article

TY - JOUR

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AU - Azman, A.

AU - Zawawi, Mohd Hafiz

AU - Hassan, N. H.

AU - Abas, A.

AU - Razak, N. A.

AU - Mazlan, A. Z.A.

AU - Mohd Remy Rozainy, M. A.Z.

PY - 2018/10/17

Y1 - 2018/10/17

N2 - Aeration is an important parameter in water filtration system as it allows the transfer of oxygen to water through turbulence effect which subsequently increases air entrainment in the water. For water treatment application, aeration efficiency is measured to ensure continuous re-oxygenation of the unfiltered water. Aside from aeration, this paper also studies the flow patterns through the use of particle image velocimetry (PIV) setup. Through the use of real scale down physical model laboratory study is performed using PIV to obtain the velocity profile. These velocity profiles will then be used to calculate the aeration efficiency of the water in a cascade aerator system. Based on the findings, the aeration efficiency obtained from the PIV experiment has a maximum value at the lowest point of the cascade aerator system with a value of 0.0139 due to increase in mass flow rate as it moves through the steps with velocity of 0.418 m/s. Therefore, in the design of a cascade aerator system, it is advisable to increase the number of steps since it will increase the aeration efficiency of the system.

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