COMPARISON BETWEEN DIFFERENT MODELS FOR RHEOLOGICAL CHARACTERIZATION OF ACTIVATED SLUDGE

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KHALILI GARAKANI A.H.; MOSTOUFI N.; SADEGHI F.; HOSSEINZADEH M.; FATOURECHI H.; SARRAFZADEH M.H.; MEHRNIA M.R.

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Journal: IRANIAN JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE AND ENGINEERING (IJEHSE) Year:2011 | Volume:8 | Issue:3 Page(s): 255-264

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Title

COMPARISON BETWEEN DIFFERENT MODELS FOR RHEOLOGICAL CHARACTERIZATION OF ACTIVATED SLUDGE

Author(s)

Keywords

ACTIVATED SLUDGE

RHEOLOGICAL CHARACTERISTICS

VISCOSITY MODELS

ACTIVATED SLUDGE

Abstract

ACTIVATED SLUDGE flow rheology is a very complicated phenomenon. Studies related to ACTIVATED SLUDGE tend to classify sludge as non-Newtonian fluid. Until now, several theories have been built to describe the complex behavior of ACTIVATED SLUDGE with varying degrees of success. In this article, seven different models for viscosity of non-Newtonian fluids (i.e., Power law, Bingham plastic, Herschel-Bulkley, Casson, Sisko, Carreau and Cross) were considered to evaluate their predictive capability of apparent viscosity of ACTIVATED SLUDGE. Results showed that although evaluating the constants in the four-parameter models is difficult, they provide the best prediction of viscosity in the whole range of shear rates for ACTIVATED SLUDGE. For easier prediction of viscosity at different mixed liquor suspended solids (2.74-31g/L), temperature (15-25°C) and shear rate (1-1000/s), simple correlations were proposed. Comparing the results with the experimental data revealed that the proposed correlations are in good agreement with real apparent viscosities.

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APA: Copy

KHALILI GARAKANI, A.H., MOSTOUFI, N., SADEGHI, F., HOSSEINZADEH, M., FATOURECHI, H., SARRAFZADEH, M.H., & MEHRNIA, M.R.. (2011). COMPARISON BETWEEN DIFFERENT MODELS FOR RHEOLOGICAL CHARACTERIZATION OF ACTIVATED SLUDGE. IRANIAN JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE AND ENGINEERING (IJEHSE), 8(3), 255-264. SID. https://sid.ir/paper/577341/en

Vancouver: Copy

KHALILI GARAKANI A.H., MOSTOUFI N., SADEGHI F., HOSSEINZADEH M., FATOURECHI H., SARRAFZADEH M.H., MEHRNIA M.R.. COMPARISON BETWEEN DIFFERENT MODELS FOR RHEOLOGICAL CHARACTERIZATION OF ACTIVATED SLUDGE. IRANIAN JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE AND ENGINEERING (IJEHSE)[Internet]. 2011;8(3):255-264. Available from: https://sid.ir/paper/577341/en

IEEE: Copy

A.H. KHALILI GARAKANI, N. MOSTOUFI, F. SADEGHI, M. HOSSEINZADEH, H. FATOURECHI, M.H. SARRAFZADEH, and M.R. MEHRNIA, “COMPARISON BETWEEN DIFFERENT MODELS FOR RHEOLOGICAL CHARACTERIZATION OF ACTIVATED SLUDGE,” IRANIAN JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE AND ENGINEERING (IJEHSE), vol. 8, no. 3, pp. 255–264, 2011, [Online]. Available: https://sid.ir/paper/577341/en

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