TY - JOUR
T1 - Hydrodynamic characterization of a column-type prototype bioreactor
AU - Espinosa-Solares, Teodoro
AU - Morales-Contreras, Marcos
AU - Robles-Martínez, Fabián
AU - García-Nazariega, Melvin
AU - Lobato-Calleros, Consuelo
N1 - Funding Information:
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.
PY - 2008/3
Y1 - 2008/3
N2 - 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 (θm) using an equivalent Froude number (Freq).
AB - 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 (θm) using an equivalent Froude number (Freq).
KW - Circulation time
KW - Dimensionless mixing time
KW - Flow pattern
KW - Froude number
KW - Non-Newtonian behavior
KW - Pneumatic agitation
UR - http://www.scopus.com/inward/record.url?scp=49549084381&partnerID=8YFLogxK
U2 - 10.1007/s12010-007-8104-0
DO - 10.1007/s12010-007-8104-0
M3 - Artículo
C2 - 18401759
SN - 0273-2289
VL - 147
SP - 133
EP - 142
JO - Applied Biochemistry and Biotechnology
JF - Applied Biochemistry and Biotechnology
IS - 1-3
ER -