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An accurate and robust method for intensification of wastewater sludge pipe flow.
Yousuf, Noman; Kurukulasuriya, Nimmi; Chryss, Andrew; Rudman, Murray; Rees, Catherine; Usher, Shane; Farno, Ehsan; Lester, Daniel; Eshtiaghi, Nicky.
Afiliación
  • Yousuf N; Chemical and Environmental Engineering, RMIT University, VIC 3000, Australia.
  • Kurukulasuriya N; Chemical and Environmental Engineering, RMIT University, VIC 3000, Australia.
  • Chryss A; CSIRO Minerals Resources, Clayton, VIC 3168, Australia.
  • Rudman M; Department of Mechanical and Aerospace Engineering, Monash University, VIC 3800, Australia.
  • Rees C; Melbourne Water Corporation, Docklands, VIC 3008, Australia.
  • Usher S; Department of Chemical and Biomolecular Engineering, The University of Melbourne, VIC 3010, Australia.
  • Farno E; South East Water, Frankston, VIC 3199, Australia.
  • Lester D; Chemical and Environmental Engineering, RMIT University, VIC 3000, Australia.
  • Eshtiaghi N; Chemical and Environmental Engineering, RMIT University, VIC 3000, Australia. Electronic address: nicky.eshtiaghi@rmit.edu.au.
Sci Total Environ ; 949: 175143, 2024 Nov 01.
Article en En | MEDLINE | ID: mdl-39084373
ABSTRACT
Globally, environmental impacts and population growth are driving the process intensification of wastewater treatment plants (WWTPs) via transition from conventional (2-3 wt% solids) to highly concentrated (4-6 wt% solids) wastewater sludges (HCWS). This presents an industrial challenge as HCWS are complex, non-Newtonian materials whose viscosity increases nonlinearly with solids concentration. This viscosity increase is particularly relevant for sludge pipe flow as it leads to considerable pumping pressure that ultimately limits the feasibility of pipe flow transportation. Hence, process intensification demands accurate prediction of HCWS turbulent pipe flow to design and optimise pumping infrastructure and piping systems. Such prediction requires accurate rheological characterisation of HCWS and numerical prediction of HCWS turbulent pipe flow, neither of which has been achieved to date due to respective limitations associated with benchtop rheometry and numerical turbulence models. We address these challenges by first developing accurate methods for rheological characterisation of HCWS via laminar flow of digested sludge at various solids concentrations (2-5 %) in a fully instrumented pipe loop facility at a large-scale WWTP. These rheological parameters are used in direct numerical simulation (DNS) computations (that avoid turbulence models) of turbulent pipe flow of HCWS. These predictions are then validated against turbulent flow pipe loop data. This method yields accurate (2-15 % error) predictions of HCWS turbulent pipe flow, compared with up to ∼75 % error for conventional pipe flow correlations. This validation highlights the need for accurate rheological characterisation and numerical simulation to predict HCWS pipe flow and provides a sound basis for the intensification and optimisation of WWTP pipeline systems.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Sci Total Environ Año: 2024 Tipo del documento: Article País de afiliación: Australia Pais de publicación: Países Bajos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Sci Total Environ Año: 2024 Tipo del documento: Article País de afiliación: Australia Pais de publicación: Países Bajos