Abstract
Agro-food industrial processes produce a large amount of residues, most of which are organic. One of the possible solutions for the treatment of these residues is anaerobic digestion in bioreactors. A novel 18-L bioreactor for treating waste water was designed based on pneumatic agitation and semispherical baffles. Flow patterns were visualized using the particle tracer technique. Circulation times were measured with the particle tracer and the thermal technique, while mixing times were measured using the thermal technique. Newtonian fluid and two non-Newtonian fluids were used to simulate the operational conditions. The results showed that the change from Newtonian to non-Newtonian properties reduces mixed zones and increases circulation and mixing times. Circulation time was similar when evaluated with the thermal and the tracer particle methods. It was possible to predict dimensionless mixing time (θ m) using an equivalent Froude number (Fr eq).
Similar content being viewed by others
Abbreviations
- d eq :
-
equivalent diameter (m)
- Fr eq :
-
equivalent dimensionless Froude number (–)
- g :
-
gravitational acceleration (m s−2)
- k :
-
consistency index (Pa sn)
- n :
-
flow behavior index (–)
- R 2 :
-
coefficient of determination (–)
- t c :
-
circulation time (s)
- t m :
-
mixing time (s)
- U f :
-
superficial velocity of the fluid (m s−1)
- \(\mathop \gamma \limits^ \bullet \) :
-
shear rate (s−1)
- θ m :
-
dimensionless mixing time (–)
- τ :
-
shear stress (Pa)
References
Gómez, X., Cuetos, M. J., Cara, J., Morán, A., & García, A. I. (2006). Renewable Energy, 31, 2017–2024.
Shigematsu, T., Tang, Y. Q., Kawaguchi, H., Ninomiya, K., Kijima, J., Kobayashi, T., Morimura, S., & Kida, K. (2003). Journal of Bioscience and Bioengineering, 96, 547–558.
Sheng, G. P., Yu, H. Q., & Li, X. Y. (2006). Biotechnology & Bioengineering, 93, 1095–1102.
Ong, H. K., Greenfield, P. F., & Pullammanappallil, P. C. (2002). Environmental Technology, 23, 1081–1090.
Espinosa-Solares, T., Bombardiere, J., Domaschko, M., Chatfield, M., Stafford, D. A., Castillo-Angeles, S., et al. (2006). Applied Biochemistry and Biotechnology, 129–132, 959–968.
Hashimoto, A. G., & Chen, Y. R. (1976). Transactions of the ASAE, 19, 930–934.
Chen, R. Y. (1981). Transactions of the ASAE, 24, 187–192.
Achkari-Begdouri, A., & Goodrich, P. R. (1992). Bioresource Technology, 40, 149–156.
El-Mashad, H. M., van Loon, W. K. P., Zeeman, G., & Bot, G. P. A. (2005). Bioresource Technology, 96(5), 531–535.
Vesvikar, M. S., & Al-Dahhan, M. (2005). Biotechnology and Bioengineering, 89, 719–732.
Espinosa-Solares, T., Brito de la Fuente, E., Tecante, A., & Tanguy, P. A. (2001). Chemical Engineering & Technology, 24, 913–918.
Espinosa-Solares, T., Brito de la Fuente, E., Tecante, A., Medina-Torres, L., & Tanguy, P. A. (2002). Chemical Engineering Research & Design, 80, 817–823.
Ulbrecht, J. (1974). Chemical Engineering (London), pp. 347–353.
Rzyski, E. (1993). Chemical Engineering and Technology, 16, 229–233.
Sánchez Mirón, A., Cerón García, M.-C., García Camacho, F., Molina-Grima, E., & Chisti, Y. (2004). Chemical Engineering Research & Design, 82, 1367–1374.
Ford, D. E., Mashelkar, R. A., & Ulbrecht, J. (1972). Process Technology International, 17, 10.
Wu, X., & Merchuk, J. C. (2003). Chemical Engineering Science, 58, 1599–1614.
Gouveia, E. R., Hokka, C. O., & Badino-Jr, A. C. (2003). Brazilian Journal of Chemical Engineering, 20, 363–374.
Acknowledgments
The authors gratefully acknowledge the financial support from Universidad Autónoma Chapingo and Instituto Politécnico Nacional. We would also like to acknowledge to Olga Lidia Martínez-Flores and Graciela Martínez-Ramírez for their contributions during the experimental work.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Espinosa-Solares, T., Morales-Contreras, M., Robles-Martínez, F. et al. Hydrodynamic Characterization of a Column-type Prototype Bioreactor. Appl Biochem Biotechnol 147, 133–142 (2008). https://doi.org/10.1007/s12010-007-8104-0
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12010-007-8104-0