CFD simulation of anaerobic digester with variable sewage sludge rheology

Water Research

Volumn 47, Issue 13, 2013, Pages 4485-4497

  Craig, K J ^a   Nieuwoudt, M N ^b   Niemand, L J ^c  

^a UNIVERSITY OF PRETORIA   (South Africa)

^b Westinghouse Electric South Africa   (South Africa)

^c Shosalowe Inv   (South Africa)

Author keywords

CFD; Digester; Hershel Bulkley law; Impeller mixing; Sludge rheology; Viscous torque

Indexed keywords

ANAEROBIC DIGESTION; COMPUTATIONAL FLUID DYNAMICS; ELASTICITY; IMPELLERS; MIXING; NON NEWTONIAN FLOW; SEWAGE SLUDGE; SHEAR STRESS; STRAIN RATE; STRESS-STRAIN CURVES; TORQUE; YIELD STRESS;

DIGESTER; HERSHEL-BULKLEY LAW; IMPELLER MIXING; SLUDGE RHEOLOGIES; VISCOUS TORQUE;

SLUDGE DIGESTION;

WATER;

ANOXIC CONDITIONS; COMPUTATIONAL FLUID DYNAMICS; DIGESTION; MIXING; NON-NEWTONIAN FLUID; PERFORMANCE ASSESSMENT; PUMPING; RHEOLOGY; SEWAGE TREATMENT; SHEAR STRESS; STEADY-STATE EQUILIBRIUM; TORQUE;

ANAEROBIC DIGESTER; ARTICLE; COMPUTATIONAL FLUID DYNAMICS; DEVICES; FLOW KINETICS; IMPELLER; PRIORITY JOURNAL; SHEAR RATE; SIMULATION; SLUDGE; SLUDGE DIGESTION;

EID: 84879015428     PISSN: 00431354     EISSN: 18792448     Source Type: Journal    
DOI: 10.1016/j.watres.2013.05.011     Document Type: Article

References (21)

1. Achkari-Begdouri A., Goodrich P.R. Rheological properties of Moroccan dairy cattle manure. Bioresource Technology 1992, 40:149-156.
2. ANSYS Fluent 13.0 User's Guide November 2010.
3. ASME V&V 20 - 2009 Standard for Verification and Validation in Computational Fluid Dynamics and Heat Transfer 2009, American Society of Mechanical Engineers.
4. Bakker C.W., Meyer C.J., Deglon D.A. Numerical modeling of non-Newtonian slurry in a mechanical flotation cell. Minerals Engineering 2009, 22:944-950.
5. Baudez J.C., Markis F., Eshtiaghi N., Slatter P. The rheological behavior of anaerobic digested sludge. Water Research 2011, 45:5675-5680.
6. Bridgeman J. Computational fluid dynamics modeling of sewage sludge mixing in an anaerobic digester. Advances in Engineering Software 2012, 44:54-62.
7. Chen Y.R. Impeller power consumption in mixing livestock manure slurries. Transactions of the ASAE 1981, 24(1):187-192.
8. Kritzinger H.P. Hydrodynamics of a Monolithic Stirrer Reactor 2010, (PhD thesis), Technical University Delft.
9. Meroney R.N. CFD simulation of mechanical draft tube mixing in anaerobic digester tanks. Water Research 2009, 43(4):1040-1050.
10. Metzner A.B., Reed J.C. Flow of non-Newtonian fluids-correlation of laminar, transition and turbulent-flow regions. AIChE Journal 1955, 1(4):434-440.
11. Monteiro P.S. The influence of the anaerobic digestion process on the sewage sludges rheological behaviour. Water Science and Technology 1997, 36(11):61-67.
12. Roache P.J. Verification and Validation in Computational Science and Engineering 1998, Hermosa Publishers, Albuquerque, New Mexico.
13. Terashima M., Goel R., Komatsu K., Yasui H., Takahashi H., Li Y.Y., Noike T. CFD simulation of mixing in anaerobic digesters. Bioresource Technology 2009, 100(7):2228-2233.
14. U.S.Environmental Protection Agency Process Design Manual for Sludge Treatment and Disposal (EPA/625/1-79/011) 1979, (Cincinnati, OH).
15. Wu B., Chen S. CFD simulation of non-Newtonian fluid flow in anaerobic digesters. Biotechnology and Bioengineering 2008, 99(3):700-711.
16. Wu B. CFD simulation of mixing in egg-shaped anaerobic digesters. Water Research 2010, 44:1507-1519.
17. Wu B. Computational fluid dynamics investigation of turbulence models for non-Newtonian fluid flow in anaerobic digesters. Environmental Science and Technology 2010, 44(23):8989-8995.
18. Wu B. CFD prediction of mixing time in anaerobic digesters. Transactions of the ASABE 2010, 53(2):553-563.
19. Wu B. CFD investigation of turbulence models for mechanical agitation of non-Newtonian fluids in anaerobic digesters. Water Research 2011, 45:2082-2094.
20. Wu B. Large Eddy simulation of mechanical mixing in anaerobic digesters. Biotechnology and Bioengineering 2012, 109(3):804-812.
21. Yu L., Ma J., Chen S. Numerical simulation of mechanical mixing in a high solid anaerobic digester. Bioresearch Technology 2011, 102(2):1012-1018.