ESTUDO HIDRODINÂMICO DE REATOR UASB DE PEQUENA ESCALA POR DINÂMICA DE FLUIDO COMPUTACIONAL (CFD): SIMULAÇÃO E VALIDAÇÃO

Vinícius Carvalho Rocha; Andreza Nataline Simões; Carla Eloísa Diniz dos Santos; Eduardo Cleto Pires

doi:10.15628/holos.2023.16400

Authors

Vinícius Carvalho Rocha Universidade Federal do Triângulo Mineiro https://orcid.org/0000-0002-0930-4567
Andreza Nataline Simões Universidade Federal do Triângulo Mineiro https://orcid.org/0000-0003-3983-5921
Carla Eloísa Diniz dos Santos Universidade Federal do Triângulo Mineiro https://orcid.org/0000-0002-5954-1026
Eduardo Cleto Pires Escola de Engenharia de São Carlos / Universidade de São Paulo https://orcid.org/0000-0001-6943-3988

DOI:

https://doi.org/10.15628/holos.2023.16400

Keywords:

CFD, experimental, simulation, tracer injection tests

Abstract

A small-scale UASB reactor was modeled in order to evaluate its hydrodynamic behavior and compare CFD simulations with experimental results obtained on a laboratory scale. Simulations using Ansys® CFX^TM were carried out with two different flow rates: A) 26.68 and B) 4.0 l d^-1. The reactor volume was 1.5 liters, with a useful volume of 1.38 liters. In addition to the CFD simulations, hydrodynamic tests with tracer injection were performed, both experimentally and in simulations. Residence time distribution (RTD) curves were obtained and the number of tanks-in-series (NTIS) model was used for determination of hydrodynamic behavior. The NTIS values calculated using CFD simulations were 5.55 and 4.76, for flow rates A and B, respectively. For the experimental analysis, the NTIS values were 6.67 and 5.54, for A and B flow rates, respectively. The Mann-Whitney U test was performed to confirm the similarity between CFD simulations and experimental tests. The results of the Mann-Whitney U test showed no statistically significant differences between the CFD simulations and experimental data. It can be concluded that CFD simulations are valid and can be used to analyze the hydrodynamic behavior of UASB reactors.

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Author Biographies

Vinícius Carvalho Rocha, Universidade Federal do Triângulo Mineiro

Doutor em Ciências (Hidráulica e Saneamento) pela Escola de Engenharia de São Carlos (EESC) da Universidade de São Paulo (USP);Professor do Departamento de Engenharia Ambiental da Universidade Federal do Triângulo Mineiro (UFTM); Diretor da Divisão de Sustentabilidade (UFTM).

Andreza Nataline Simões, Universidade Federal do Triângulo Mineiro

Engenharia Ambiental pela Universidade Federal do Triângulo Mineiro (UFTM); Mestre em Ciências (Hidráulica e Saneamento) pela Escola de Engenharia de São Carlos (EESC) da Universidade de São Paulo (USP).

Carla Eloísa Diniz dos Santos, Universidade Federal do Triângulo Mineiro

Doutora em Ciências (Hidráulica e Saneamento) pela Escola de Engenharia de São Carlos (EESC) da Universidade de São Paulo (USP). Entre 2014 e 2015, completou um doutorado sanduíche de 12 meses na Universidade Politécnica de Gdansk (Polônia) no âmbito do Projeto CARBALA (CARbon BALAncing for nutrient control in wastewater treatment), financiado pelo projeto da Comunidade Europeia People Maria Curie Actions ( FP7-PESSOAS-2011-IRSES). Professora do Departamento de Engenharia Ambiental da Universidade Federal do Triângulo Mineiro (UFTM). É orientadora do Programa de Pós-Graduação em Ciência e Tecnologia Ambiental (PPGCTA/UFTM).

Eduardo Cleto Pires, Escola de Engenharia de São Carlos / Universidade de São Paulo

Doutor em Engenharia Civil (Hidráulica e Saneamento) pela Universidade de São Paulo (USP); Professor Sênior da Escola de Engenharia de São Carlos (EESC) da Universidade de São Paulo (USP)

References

Bhatti. Z.A., Maqboo, F., Malik, A.H., Mehmood., Q. (2014). UASB reactor startup for the treatment of municipal wastewater followed by advanced oxidation process. Brazilian Journal of Chemical Engineering, 31 (03), 715-726.

Chernicharo, C.A.L., van Lier, J.B., Noyola, A., Bressani Ribeiro, T. (2015). Anaerobic sewage treatment: state of the art, constraints and challenges. Rev Environ Sci Biotechnol, 14, 649-679.

Cruz, D.B., Arantes, E.J., Carvalho, K.Q., Passing, F.H., Kreutz, C., Gonçalves, M.S. (2016). Avaliação do comportamento hidrodinâmico de reator anaeróbio de manta de lodo e fluxo ascendente com diferentes configurações do sistema de distribuição do afluente utilizando fluidodinâmica computacional. Eng. Sanit. Ambient. 21 (4), 721-730.

Curi, T.M.R.C., Moura, D.J., Massari, J.M., Mesquita, M., Pereira., D.F. (2017). Computational Fluid Dynamics (CFD) application for ventilation studies in broiler houses. Engenharia Agrícola, 37 (1), 1-12.

Daud, M.K., Rizvi, H., Akram, M.F., Ali, S., Rizwan, M., Nafees, M., Jin, Z.S. (2018). Review of Upflow Anaerobic Sludge Blanket Reactor Technology: Effect of Different Parameters and Developments for Domestic Wastewater Treatment. Journal of Chemistry. https://doi.org/10.1155/2018/1596319

Fia, F.R.L., Fia, R., Campos, C.M.M., Oliveira, L.F.C. (2016). Hydrodynamic behavior of a combined anaerobic-aerobic system employed in the treatment of vinasse. Ciênc. Agrotec., 40 (6), 718-729. https://doi.org/10.1590/1413-70542016406010416

Fortuna, A.O. (2000). Técnicas computacionais para dinâmica de fluidos. (2ª ed.). Edusp.

Hinken, L., Huber, M., Weichgrebe, D., Rosenwinkel, K.-H. (2014). Modified ADM1 for modelling an UASB reactor laboratory plant treating starch wastewater and synthetic substrate load tests. Water Research, 64, 82-93.

Levenspiel O. (1999). Chemical Reaction Engineering. (3ª ed.). John Wiley & Sons.

Li, G., Yang, X., Dai, G. (2009). CFD simulation of effects of the configuration of gas distributors on gas–liquid flow and mixing in a bubble column. Chemical Engineering Science, 64, 5104-5116. https://doi.org/10.1016/j.ces.2009.08.016.

Lu, X., Zhen, G., Estrada, A.L., Chen, M., Ni, J., Hojo, T., Kubota, K., Li, Y-Y. (2015). Operation performance and granule characterization of upflow anaerobic sludge blanket (UASB) reactor treating wastewater with starch as the sole carbon source. Bioresource Technology, 180, 264-273.

Passos, R.G., Von Sperling, M., Ribeiro, T.B. (2014). Hydrodynamic evaluation of full-scale facultative pond by CFD (computational fluid dynamics) and field measurements. Water Sci. Technol., 70(3), 569-575.

Pourtousi, M., Sahu, J.N., Ganesan, P., Shamshirband, S., Redzwan, R. (2015). A combination of computational fluid dynamics (CFD) and adaptive neuro-fuzzy system (ANFIS) for prediction of the bubble column hydrodynamics. Powder Technology., 274, 466-481.

Rodríguez-Gómez, R., Renman, G., Moreno, L., Liu, L. (2014). A model to describe the performance of the UASB reactor. Biodegradation, 25, 239-251.

Ren T-T, Mu Y, Ni B-J, Yu, H-Q. (2009). Hydrodynamics of upflow anaerobic sludge blanket reactors. Aiche Journal. 55(2), 516-528.