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Mixing characteristic improvement of a wastewater treatment plant anerobic digester using CFD analysis | ||
| Journal of Applied Research in Water and Wastewater | ||
| مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از تاریخ 13 آذر 1404 اصل مقاله (1.55 M) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22126/arww.2025.12055.1368 | ||
| نویسندگان | ||
| Seyed Hosein Arabfarashahi؛ Shahram Talebi* | ||
| Department of Mechanical Engineering, Faculty of Mechanical Engineering, Yazd University, Yazd, Iran. | ||
| چکیده | ||
| In this paper the influence of the operational and geometrical parameters on the mixing and flow uniformity within an anaerobic digester is investigated. Anaerobic digestion is classified as single or multiphase flow reactor to produce biogas from processed organic waste. Within the digesters, mass transfer is a key component to obtain an optimal process which is highly dependent on uniformity and turbulence of the flow. Two quantitative mixing criteria namely uniformity index and turbulence intensity are assessed to investigate the possibility of improving mixing characteristics of an operating digester. The effect of inlet velocity, draft tube flow presence, draft tube velocity magnitude and direction and inlet tube position have been investigated and compared to a validated base case. According to the finding both inlet velocity and inlet pipe position can noticeably affect the operation of the digester and proper tuning of the inlet velocity and also optimized pipe position can enhance the uniformity of the flow while inducing high turbulence within the digester. Furthermore, by adjusting the inlet pipe position, it is possible to improve the uniformity index and turbulence intensity by 44% and 40% respectively. | ||
| کلیدواژهها | ||
| Computational fluid dynamics؛ Wastewater treatment؛ Digester modelling | ||
| مراجع | ||
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ANSYS, Inc. (2024) ANSYS Fluent Theory Guide, Release 2024, ANSYS, Inc., Canonsburg.
Caillet, H., Bastide, A. and Adelard, L. (2023) 'Advances in Computational Fluid Dynamics modeling of anaerobic digestion process for renewable energy production: A review', Cleaner Waste Systems, 6, p. 100124. doi: https://doi.org/10.1016/j.clwas.2023.100124
Craig, K.J., Nieuwoudt, M.N. and Niemand, L.J. (2013) 'CFD simulation of anaerobic digester with variable sewage sludge rheology', Water Research, 47(13), pp. 4485–4497. doi: https://doi.org/10.1016/j.watres.2013.05.011
Dabiri, S. et al. (2021) 'CFD modeling of a stirred anaerobic digestion tank for evaluating energy consumption through mixing', Water (Basel), 13(12). doi: https://doi.org/10.3390/w13121629
Hernandez-Aguilar, E. et al. (2016) 'Development of energy efficient mixing strategies in egg-shaped anaerobic reactors through 3D CFD simulation', Journal of Environmental Science and Health, Part A, 51(7), pp. 536–543. doi: https://doi.org/10.1080/10934529.2016.1141619
Karim, K., Varma, R., Vesvikar, M. and Al-Dahhan, M.H. (2004) 'Flow pattern visualization of a simulated digester', Water Research, 38(17), pp. 3659–3670. doi: https://doi.org/10.1016/j.watres.2004.06.009
Leonzio, G. (2018) 'Study of mixing systems and geometric configurations for anaerobic digesters using CFD analysis', Renewable Energy, 123, pp. 578–589. doi: https://doi.org/10.1016/j.renene.2018.02.071
López-Jiménez, P.A. et al. (2015) 'Application of CFD methods to an anaerobic digester: The case of Ontinyent WWTP, Valencia, Spain', Journal of Water Process Engineering, 7, pp. 131–140. doi: https://doi.org/10.1016/j.jwpe.2015.05.006
Meister, M. et al. (2018) 'Mixing non-Newtonian flows in anaerobic digesters by impellers and pumped recirculation', Advances in Engineering Software, 115, pp. 194–203. doi: https://doi.org/10.1016/j.advengsoft.2017.09.015
Meroney, R.N. and Colorado, P.E. (2009) 'CFD simulation of mechanical draft tube mixing in anaerobic digester tanks', Water Research, 43(4), pp. 1040–1050. doi: https://doi.org/10.1016/j.watres.2008.11.035
Sajjadi, B., Raman, A.A.A. and Parthasarathy, R. (2016) 'Fluid dynamic analysis of non-Newtonian flow behavior of municipal sludge simulant in anaerobic digesters using submerged, recirculating jets', Chemical Engineering Journal, 298, pp. 259–270. doi: https://doi.org/10.1016/j.cej.2016.03.069
Stamou, A.I. (2008) 'Improving the hydraulic efficiency of water process tanks using CFD models', Chemical Engineering and Processing: Process Intensification, 47(8), pp. 1179–1189. doi: https://doi.org/10.1016/j.cep.2007.02.033
Terashima et al. (2009) 'CFD simulation of mixing in anaerobic digesters', Bioresource Technology, 100(7), pp. 2228–2233. doi: https://doi.org/10.1016/j.biortech.2008.07.069
Wols, B.A. et al. (2010) 'Evaluation of different disinfection calculation methods using CFD', Environmental Modelling and Software, 25(4), pp. 573–582. doi: https://doi.org/10.1016/j.envsoft.2009.09.007
Vesvikar, M.S. and Al-Dahhan, M. (2005) 'Flow pattern visualization in a mimic anaerobic digester using CFD', Biotechnology and Bioengineering, 89(6), pp. 719–732. doi: https://doi.org/10.1002/bit.20388
Wu, B. (2014) 'CFD simulation of gas mixing in anaerobic digesters', Computers and Electronics in Agriculture, 109, pp. 278–286. doi: https://doi.org/10.1016/j.compag.2014.10.007
Singh, B. et al. (2021) 'Critical analysis of methods adopted for evaluation of mixing efficiency in an anaerobic digester', Sustainability, 13(12). doi: https://doi.org/10.3390/su13126668
Van Canneyt, K. and Verdonck, P. (2014) '10.02 - mechanics of biofluids in living body', in comprehensive biomedical physics, A. Brahme, Ed., Oxford: Elsevier, pp. 39–53. doi: https://doi.org/10.1016/B978-0-444-53632-7.01003-0
Wang, F., Zhang, C. and Huo, S. (2017) 'Influence of fluid dynamics on anaerobic digestion of food waste for biogas production', Enviromental Technology, 38(13), pp. 1681-1688. doi: https://doi.org/10.1080/09593330.2016.1220429
Wu, B. (2010) 'CFD simulation of mixing in egg-shaped anaerobic digesters', Water Research, 44(5), pp. 1507–1519. doi: https://doi.org/10.1016/j.watres.2009.10.040
Zhang, J. et al. (2018) 'Structural characteristics of a spiral symmetry stream anaerobic bioreactor based on CFD', Biochemical Engineering Journal, 137, pp. 50–61. doi: https://doi.org/10.1016/j.bej.2018.05.016 | ||
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