Numerical simulation of bioleaching pond reactors coupling CFD and heat balance modelling
International audience A new technology of bioreactor was recently developed for bioleaching applications. It consists in ponds where pulp suspension and gas-liquid mass transfer are achieved with floating agitators [1,2]. Bioleaching reactions are significantly exothermic with high oxygen requireme...
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ftunilorrainehal:oai:HAL:hal-03656048v1 2024-05-19T07:36:25+00:00 Numerical simulation of bioleaching pond reactors coupling CFD and heat balance modelling Loubière, Céline Pino-Herrera, Douglas O. Hubau, Agathe Olmos, Eric Guezennec, Anne-Gwenaelle Bureau de Recherches Géologiques et Minières (BRGM) Laboratoire Réactions et Génie des Procédés (LRGP) Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS) Ottawa, Canada 2022-08-07 https://brgm.hal.science/hal-03656048 en eng HAL CCSD hal-03656048 https://brgm.hal.science/hal-03656048 15th International Conference on Gas-Liquid and Gas-Liquid-Solid Reactor Engineering (GLS-15) https://brgm.hal.science/hal-03656048 15th International Conference on Gas-Liquid and Gas-Liquid-Solid Reactor Engineering (GLS-15), Aug 2022, Ottawa, Canada Bioleaching Pond Floating agitator CFD Heat balance Triphasic reactor [SPI]Engineering Sciences [physics] [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering [INFO.INFO-MO]Computer Science [cs]/Modeling and Simulation info:eu-repo/semantics/conferenceObject Conference papers 2022 ftunilorrainehal 2024-05-01T23:55:44Z International audience A new technology of bioreactor was recently developed for bioleaching applications. It consists in ponds where pulp suspension and gas-liquid mass transfer are achieved with floating agitators [1,2]. Bioleaching reactions are significantly exothermic with high oxygen requirements and thus need temperature regulation to maintain biological activity. Contrary to conventional stirred tank reactors, the temperature in ponds may be difficult to regulate through heat exchangers. A numerical strategy was developed to design an industrial demonstration of the concept and to select suitable operating parameters. Firstly, Computational Fluid Dynamics was used to model the system's hydrodynamics and to define the volume of influence of one single agitator, the number of floating agitators and the mechanical power dissipated into the fluid. Then, a heat balance model was developed to characterize the impact of each heat transfer contribution (operating and environmental conditions) on temperature regulation. Various location (equatorial and sub-arctic climates) and geometries (stirred tank, pond) were simulated for the model development. These simulations showed that, for low sulfide concentrations, by controlling aeration (flow rate and oxygen partial pressure) and the fresh pulp inlet conditions (flow rate, temperature), the temperature can be maintained in a suitable range (40 to 50°C). Conference Object Arctic Université de Lorraine: HAL |
institution |
Open Polar |
collection |
Université de Lorraine: HAL |
op_collection_id |
ftunilorrainehal |
language |
English |
topic |
Bioleaching Pond Floating agitator CFD Heat balance Triphasic reactor [SPI]Engineering Sciences [physics] [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering [INFO.INFO-MO]Computer Science [cs]/Modeling and Simulation |
spellingShingle |
Bioleaching Pond Floating agitator CFD Heat balance Triphasic reactor [SPI]Engineering Sciences [physics] [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering [INFO.INFO-MO]Computer Science [cs]/Modeling and Simulation Loubière, Céline Pino-Herrera, Douglas O. Hubau, Agathe Olmos, Eric Guezennec, Anne-Gwenaelle Numerical simulation of bioleaching pond reactors coupling CFD and heat balance modelling |
topic_facet |
Bioleaching Pond Floating agitator CFD Heat balance Triphasic reactor [SPI]Engineering Sciences [physics] [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering [INFO.INFO-MO]Computer Science [cs]/Modeling and Simulation |
description |
International audience A new technology of bioreactor was recently developed for bioleaching applications. It consists in ponds where pulp suspension and gas-liquid mass transfer are achieved with floating agitators [1,2]. Bioleaching reactions are significantly exothermic with high oxygen requirements and thus need temperature regulation to maintain biological activity. Contrary to conventional stirred tank reactors, the temperature in ponds may be difficult to regulate through heat exchangers. A numerical strategy was developed to design an industrial demonstration of the concept and to select suitable operating parameters. Firstly, Computational Fluid Dynamics was used to model the system's hydrodynamics and to define the volume of influence of one single agitator, the number of floating agitators and the mechanical power dissipated into the fluid. Then, a heat balance model was developed to characterize the impact of each heat transfer contribution (operating and environmental conditions) on temperature regulation. Various location (equatorial and sub-arctic climates) and geometries (stirred tank, pond) were simulated for the model development. These simulations showed that, for low sulfide concentrations, by controlling aeration (flow rate and oxygen partial pressure) and the fresh pulp inlet conditions (flow rate, temperature), the temperature can be maintained in a suitable range (40 to 50°C). |
author2 |
Bureau de Recherches Géologiques et Minières (BRGM) Laboratoire Réactions et Génie des Procédés (LRGP) Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS) |
format |
Conference Object |
author |
Loubière, Céline Pino-Herrera, Douglas O. Hubau, Agathe Olmos, Eric Guezennec, Anne-Gwenaelle |
author_facet |
Loubière, Céline Pino-Herrera, Douglas O. Hubau, Agathe Olmos, Eric Guezennec, Anne-Gwenaelle |
author_sort |
Loubière, Céline |
title |
Numerical simulation of bioleaching pond reactors coupling CFD and heat balance modelling |
title_short |
Numerical simulation of bioleaching pond reactors coupling CFD and heat balance modelling |
title_full |
Numerical simulation of bioleaching pond reactors coupling CFD and heat balance modelling |
title_fullStr |
Numerical simulation of bioleaching pond reactors coupling CFD and heat balance modelling |
title_full_unstemmed |
Numerical simulation of bioleaching pond reactors coupling CFD and heat balance modelling |
title_sort |
numerical simulation of bioleaching pond reactors coupling cfd and heat balance modelling |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://brgm.hal.science/hal-03656048 |
op_coverage |
Ottawa, Canada |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
15th International Conference on Gas-Liquid and Gas-Liquid-Solid Reactor Engineering (GLS-15) https://brgm.hal.science/hal-03656048 15th International Conference on Gas-Liquid and Gas-Liquid-Solid Reactor Engineering (GLS-15), Aug 2022, Ottawa, Canada |
op_relation |
hal-03656048 https://brgm.hal.science/hal-03656048 |
_version_ |
1799475540337360896 |