Dapelo, D 
ORCID: 0000-0002-3442-6857 and Bridgeman, J ORCID: 0000-0001-8348-5004
(2018)
Euler-Lagrange Computational Fluid Dynamics simulation of a full-scale unconfined anaerobic digester for wastewater sludge treatment
Advances in Engineering Software, 117.
pp. 153-169.
ISSN 0965-9978, 1873-5339
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Abstract
For the first time, an Euler-Lagrange model for Computational Fluid Dynamics (CFD) is used to model a full-scale gas-mixed anaerobic digester. The design and operation parameters of a digester from a wastewater treatment works are modelled, and mixing is assessed through a novel, multi-facetted approach consisting of the simultaneous analysis of (i) velocity, shear rate and viscosity flow patterns, (ii) domain characterization following the average shear rate value, and (iii) concentration of a non-diffusive scalar tracer. The influence of sludge's non-Newtonian behaviour on flow patterns and its consequential impact on mixing quality were discussed for the first time. Recommendations to enhance mixing effectiveness are given: (i) a lower gas mixing input power can be used in the digester modelled within this work without a significant change in mixing quality, and (ii) biogas injection should be periodically switched between different nozzle series placed at different distances from the centre.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Wastewater, Sludge, CFD, Euler-Lagrangian, Non-Newtonian fluid, Turbulence, Energy |
| Divisions: | Faculty of Science & Engineering > School of Engineering |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 17 May 2023 10:11 |
| Last Modified: | 01 Mar 2026 01:34 |
| DOI: | 10.1016/j.advengsoft.2017.08.009 |
| Related Websites: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3170417 |
| Disclaimer: | The University of Liverpool is not responsible for content contained on other websites from links within repository metadata. Please contact us if you notice anything that appears incorrect or inappropriate. |
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