COMPARISON OF DIFFERENT RHEOLOGICAL MODELS FOR ACTIVAED SLUDGE IN A SECONDARY STEEP CYLINDRICAL SETTLING TANK USING CFD MODELING METHOD

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ABASALI POUR S.; SHAH HOSSEINI SH.

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Journal: JOURNAL OF SEPARATION AND TRANSPORT PHENOMENA (JOURNAL OF SCHOOL OF ENGINEERING) Year:2011 | Volume:22 | Issue:1 Page(s): 1-12

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Title

COMPARISON OF DIFFERENT RHEOLOGICAL MODELS FOR ACTIVAED SLUDGE IN A SECONDARY STEEP CYLINDRICAL SETTLING TANK USING CFD MODELING METHOD

Author(s)

ABASALI POUR S. | SHAH HOSSEINI SH. | Issue Writer Certificate

Keywords

WASTE WATERQ3

ACTIVATED SLUDGEQ2

COMPUTATIONAL FLUID DYNAMICSQ2

NON-NEWTONIAN FLUIDQ3

SETTLING TANKQ3

Abstract

The secondary SETTLING TANKs are used in ACTIVATED SLUDGE wastewater treatment processes to separate treated water from the microbial mass leaving the aeration tank. In this study, a single-phase, 2dimentional, and unsteady state model was presented and solved to predict the concentration and velocity distribution in secondary SETTLING TANKs. The results showed a good agreement with the experimental data. Due to the non-Newtonian nature of ACTIVATED SLUDGE and its influence on the obtained flow field, the viscous models such as Bingham, Casson, modified Herschel-Bulkley, Bokil, and constant water viscosity model were used in modeling and their results were compared. The results obtained from different models show that the non-Newtonian models have a considerable effect on the determination of concentration and velocity distribution. The Bingham and Casson models overestimate the sludge blanket depth due to higher shear stress than other models and don't present acceptable results.

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APA: Copy

ABASALI POUR, S., & SHAH HOSSEINI, SH.. (2011). COMPARISON OF DIFFERENT RHEOLOGICAL MODELS FOR ACTIVAED SLUDGE IN A SECONDARY STEEP CYLINDRICAL SETTLING TANK USING CFD MODELING METHOD. JOURNAL OF SEPARATION AND TRANSPORT PHENOMENA (JOURNAL OF SCHOOL OF ENGINEERING), 22(1), 1-12. SID. https://sid.ir/paper/196183/en

Vancouver: Copy

ABASALI POUR S., SHAH HOSSEINI SH.. COMPARISON OF DIFFERENT RHEOLOGICAL MODELS FOR ACTIVAED SLUDGE IN A SECONDARY STEEP CYLINDRICAL SETTLING TANK USING CFD MODELING METHOD. JOURNAL OF SEPARATION AND TRANSPORT PHENOMENA (JOURNAL OF SCHOOL OF ENGINEERING)[Internet]. 2011;22(1):1-12. Available from: https://sid.ir/paper/196183/en

IEEE: Copy

S. ABASALI POUR, and SH. SHAH HOSSEINI, “COMPARISON OF DIFFERENT RHEOLOGICAL MODELS FOR ACTIVAED SLUDGE IN A SECONDARY STEEP CYLINDRICAL SETTLING TANK USING CFD MODELING METHOD,” JOURNAL OF SEPARATION AND TRANSPORT PHENOMENA (JOURNAL OF SCHOOL OF ENGINEERING), vol. 22, no. 1, pp. 1–12, 2011, [Online]. Available: https://sid.ir/paper/196183/en

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