Process optimization and CFD simulation in external loop airlift reactor and sectionalized external loop airlift for application of wastewater treatment
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Shivanand M. Teli
and
Channamallikarjun Mathpati
Abstract
The industrial wastewater treatment is carried out in an external loop airlift reactor (EL-ALR) and sectionalized EL-ALR. The airflow rate is optimized in EL-ALR and sectionalized EL-ALR for better degradation of wastewater. The 74% degradation is obtained in sectionalized EL-ALR as compared to EL-ALR for continuous aeration up to 32 h. For higher superficial gas velocity (U G ) percentage degradation is decreased due to shear stress on microorganisms. The extent of degradation is obtained 77 and 80% for the effect of hydrogen peroxide (H2O2) and combination of H2O2 and Fenton reagent in an EL-ALR. The computational fluid dynamic (CFD) simulation validated with experimental results of gas hold-up and liquid circulation velocity compared in EL-ALR sectionalized EL-ALR over a broad range of superficial gas velocity 0.0024 ≤ U G ≤ 0.016 m/s. The comparison of CFD and experimental values of gas hold-up and liquid circulation velocity are in good agreement.
Funding source: Gharda Institute of Technology (GIT)
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Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: This study was supported by Gharda Institute of Technology (GIT) for design of lab scale reactors.
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Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
References
Amini, E., M. Mehrnia, S. Mousavi, and N. Mostouf. 2013. “Experimental Study and Computational Fluid Dynamics Simulation of a Full-Scale Membrane Bioreactor for Municipal Wastewater Treatment Application.” Industrial & Engineering Chemistry Research 52 (29): 9930–9, doi:https://doi.org/10.1021/ie400632y.Search in Google Scholar
Atenas, M., M. Clark, and V. Lazarova. 1999. “Holdup and Liquid Circulation Velocity in a Rectangular Air-Lift Bioreactor.” Industrial & Engineering Chemistry Research 38 (3): 944–9, https://doi.org/10.1021/ie980052l.Search in Google Scholar
Ayare, S. D., and P. R. Gogate. 2019. “Sonocatalytic Treatment of Phosphonate Containing Industrial Wastewater Intensified Using Combined Oxidation Approaches.” Ultrasonics Sonochemistry 51: 69–76, https://doi.org/10.1016/j.ultsonch.2018.10.018.Search in Google Scholar
Ayare, S. D., and P. R. Gogate. 2020. “Sonophotocatalytic Oxidation Based Treatment of Phthalocyanine Pigment Containing Industrial Wastewater Intensified Using Oxidising Agents.” Separation and Purification Technology 233 (August 2019): 115979, https://doi.org/10.1016/j.seppur.2019.115979.Search in Google Scholar
Bouaifi, M., G. Hebrard, D. Bastoul, and M. Roustan. 2001. “A Comparative Study of Gas Hold-Up, Bubble Size, Interfacial Area and Mass Transfer Coefficients in Stirred Gas-Liquid Reactors and Bubble Columns.” Chemical Engineering and Processing 40: 97–111, doi:https://doi.org/10.1016/S0255-2701(00)00129-X.Search in Google Scholar
Bouaifi, M., and M. Roustan. 1998. “Bubble Size and Mass Transfer Coefficients in Dual-Impeller Agitated Reactors.” Canadian Journal of Chemical Engineering 76 (3): 390–7, doi:https://doi.org/10.1002/cjce.5450760307.Search in Google Scholar
Devi, T. T., and B. Kumar. 2017. “Mass Transfer and Power Characteristics of Stirred Tank with Rushton and Curved Blade Impeller.” Engineering Science and Technology, An International Journal 20 (2): 730–7, https://doi.org/10.1016/j.jestch.2016.11.005.Search in Google Scholar
Do-Quang, Z., A. Cockx, A. Liné, and M. Roustan. 1998. “Computational Fluid Dynamics Applied to Water and Wastewater Treatment Facility Modeling.” Environmental Engineering and Policy 1 (3): 137–47, doi:https://doi.org/10.1007/s100220050015.Search in Google Scholar
Elshazly, A. H., and A. H. Konsowa. 2003. “Removal of Nickel Ions from Wastewater Using a Cation-Exchange Resin in a Batch-Stirred Tank Reactor.” Desalination 158 (1–3): 189–93, https://doi.org/10.1016/S0011-9164(03)00450-8.Search in Google Scholar
Essadki, A. H., B. Gourich, Ch. Vial, H. Delmas, and M. Bennajah. 2009. “Defluoridation of Drinking Water by Electrocoagulation/Electrolocation in a Stirred Tank Reactor with a Comparative Performance to an External-Loop Airlift Reactor.” Journal of Hazardous Materials 168 (2–3): 1325–33, doi:https://doi.org/10.1016/j.jhazmat.2009.03.021.Search in Google Scholar PubMed
Fuchs, W., H. Binder, G. Mavrias, and R. Braun. 2003. “Anaerobic Treatment of Wastewater with High Organic Content Using a Stirred Tank Reactor Coupled with a Membrane Filtration Unit.” Water Research 37 (4): 902–8, doi:https://doi.org/10.1016/S0043-1354(02)00246-4.Search in Google Scholar
Gogate, P. R. 2007. “Application of Cavitational Reactors for Water Disinfection: Current Status and Path Forward.” Journal of Environmental Management 85 (4): 801–15, https://doi.org/10.1016/j.jenvman.2007.07.001.Search in Google Scholar
Huang, Q., C. Yang, G. Yu, and Z. Mao. 2010. “CFD Simulation of Hydrodynamics and Mass Transfer in an Internal Airlift Loop Reactor Using a Steady Two-Fluid Model.” Chemical Engineering Science 65: 5527–36, doi:https://doi.org/10.1016/j.ces.2010.07.021.Search in Google Scholar
Joshi, J. B. 2001. “Computational Flow Modelling and Design of Bubble Column Reactors.” Chemical Engineering Science 56: 5893–933, https://doi.org/10.1016/S0009-2509(01)00273-1.Search in Google Scholar
Krampe, J., and K. Krauth. 2003. “Oxygen Transfer into Activated Sludge with High MLSS Concentrations.” Water Science and Technology 47 (11): 297–303, https://doi.org/10.2166/wst.2003.0618.Search in Google Scholar
Le Moullec, Y., C. Gentric, O. Potier, and J. P. Leclerc. 2010. “Comparison of Systemic, Compartmental and CFD Modelling Approaches: Application to the Simulation of a Biological Reactor of Wastewater Treatment.” Chemical Engineering Science 65 (1): 343–50, doi:https://doi.org/10.1016/j.ces.2009.06.035.Search in Google Scholar
Mehta, R. L. M. 2020. “Wastewater: Sources of Pollutants and its Remediation.” Environmental Biotechnology 2: 1–1, doi:https://doi.org/10.1007/978-3-030-38196-7_9.Search in Google Scholar
Mohanty, K., D. Das, and M. N. Biswas. 2008. “Treatment of Phenolic Wastewater in a Novel Multi-Stage External Loop Airlift Reactor Using Activated Carbon.” Separation and Purification Technology 58 (3): 311–9, https://doi.org/10.1016/j.seppur.2007.05.005.Search in Google Scholar
Naidoo, N., W. J. Pauck, and M. Carsky. 2020. “Predicting Mass Transfer in Pilot Scale External Loop Airlift Reactors Using Neural Networks.” South African Journal of Chemical Engineering 33: 83–9, https://doi.org/10.1016/j.sajce.2020.05.002.Search in Google Scholar
Samstag, R. W., J. J. Ducoste, A. Griborio, I. Nopens, D. J. Batstone, J. D. Wicks, S. Saunders, E. A. Wicklein, G. Kenny, and J. Laurent. 2016. “CFD for Wastewater Treatment: An Overview.” Water Science and Technology 74 (3): 549–63, doi:https://doi.org/10.2166/wst.2016.249.Search in Google Scholar PubMed
Samstag, R. W., and E. A. Wicklein. 2014. “A Protocol for Optimization of Activated Sludge Mixing.” 87th Annual Water Environment Federation Technical Exhibition and Conference 7 (November): 3614–40, https://doi.org/10.2175/193864714815939453.Search in Google Scholar
Saravanan, P., K. Pakshirajan, and P. Saha. 2008. “Performance of Batch Stirred Tank Bioreactor and Internal Loop Airlift Bioreactor in Degrading Phenol Using Pseudomonas spp.-A Comparative Study.” Journal of Environmental Protection Science 2: 81–6.Search in Google Scholar
Siddique, N. I., M. S. A. Munaim, and Z. A. Wahid. 2015. “Role of Biogas Recirculation in Enhancing Petrochemical Wastewater Treatment Efficiency of Continuous Stirred Tank Reactor.” Journal of Cleaner Production 91: 229–34, https://doi.org/10.1016/j.jclepro.2014.12.036.Search in Google Scholar
Sivasubramanian, V., and B. Naveen Prasad. 2011. “Effects of Superficial Gas Velocity and Fluid Property on the Hydrodynamic Performance of an Airlift Column with Alcohol Solution.” International Journal of Engineering, Science and Technology 1 (1): 245–53, https://doi.org/10.4314/ijest.v1i1.58083.Search in Google Scholar
Stukenberg, J. R., V. N. Wahbeh, and R. E. McKinney. 1977. “Experiences in Evaluating and Specifying Aeration Equipment.” Journal of the Water Pollution Control Federation 49 (1): 66–82.Search in Google Scholar
Teli, S. M., and C. Mathpati. 2019. “Hydrodynamic Studies in Sectionalised External Loop Air Lift Reactors.” Indian Chemical Engineer 63 (1): 34–49, doi:https://doi.org/10.1080/00194506.2019.1689185.Search in Google Scholar
Teli, S. M., and C. Mathpati. 2021. “Experimental and Numerical Study of Gas-Liquid Flow in a Sectionalized External-Loop Airlift Reactor.” Chinese Journal of Chemical Engineering 32: 39–60, doi:https://doi.org/10.1016/j.cjche.2020.10.023.Search in Google Scholar
Thakore, S. B., and B. I. Bhatt. 2007. Introduction to Process Engineering and Design. New Delhi: McGraw-Hil.Search in Google Scholar
Tyagi, R. D., D. Couillard, and F. T. Tran. 1991. “Comparative Study of Bacterial Leaching of Metals from Sewage Sludge in Continuous Stirred Tank and Air-Lift Reactors.” Process Biochemistry 26 (1): 47–54, https://doi.org/10.1016/0032-9592(91)80007-C.Search in Google Scholar
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- Synthesis of NPK fertilizer from low-grade phosphate raw material
- Modelling and performance analysis for cumene production process in a four-layer packed bed reactor
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