Influence of impeller type on hydrodynamics and gas-liquid mass-transfer in stirred airlift bioreactor

Autor(es)

de Jesus, Sergio S. ^[1] ; Moreira Neto, Joao ^[1] ; Santana, Aline ^[1] ; Maciel Filho, Rubens ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Sch Chem Engn, Lab Optimizat Design & Adv Control, BR-13083852 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: AICHE JOURNAL; v. 61, n. 10, p. 3159-3171, OCT 2015.
• Citações Web of Science: 14

Resumo

The influence of impeller type in a mechanically stirred airlift bioreactor was analyzed in relation to the non-Newtonian viscous fluids. The agitation was carried out through a marine impeller (axial impeller) and a paddle impeller (radial impeller) located along with the gas sparger in the region comprised by the riser. The bioreactor was sparged with air under different velocities (0.036-0.060 m s(-1)). Carboxymethylcellulose 1.94% and xanthan 1.80% were used as a fluid model. The gas holdup and volumetric mass-transfer coefficient increased in up to five and three times, respectively, when compared to a conventional airlift bioreactor; however, better results were obtained when the straight paddle impeller type was used. The results suggest that the studied bioreactor can be used successfully in viscous fluid, and it can be more efficient than conventional airlift bioreactors. The results obtained suggest the use of radial impellers. (c) 2015 American Institute of Chemical Engineers AIChE J, 61: 3159-3171, 2015 (AU)

• Processo FAPESP: 08/57873-8 - Um processo integrado para produção total de bioetanol e emissão zero de CO2
• Beneficiário: Rubens Maciel Filho
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Temático
• Processo FAPESP: 10/04903-7 - Projeto e construção de um fotobiorreator airlift agitado para a produção de biodiesel
• Beneficiário: Rubens Maciel Filho
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 10/03764-3 - Projeto e construção de um fotobiorreator airlift agitado para a produção de lipídeos e carboidratos
• Beneficiário: Sergio Santos de Jesus
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado