Rheological behavior of Phanerochaete chrysosporium broth during lignin degradation.
Rheological behavior of a lignin-degrading culture of Phanerochaete chrysosporium CDBB-H-298 was determined. Rheological characteristics revealed a Newtonian behavior in the culture medium without fungi, and a non-Newtonian dilatant behavior with fungi. In addition, the rheological behavior of the lignin-containing culture medium was complex, and changed from dilatant to pseudoplastic. During fungal growth without lignin in Kirk media rheological behavior exhibited a parabolic profile, and thixotropy showed a tendency to increase. Results indicated a small increase in the apparent viscosity in the presence of lignin; however, this may not affect the oxygen and mass transfer coefficients. The present findings can be applied to bioreactor desing for waste water treatment.
Hernández-Peñaranda
A M
AM
Departamento de Biotecnología y Bioingeniería, Centro de Investigacíon y de Estudios Avanzados del Instituto Politécnico Nacional, Mexico, DF.
Salazar-Montoya
J A
JA
Rodriguez-Vázquez
R
R
Ramos-Ramirez
E G
EG
D001673:Biodegradation, Environmental; D019149:Bioreactors; D003470:Culture Media; D008031:Lignin / Q000378:metabolism*; D008954:Models, Biological; D010100:Oxygen / Q000378:metabolism; D020075:Phanerochaete / Q000502:physiology*
D003470:Culture Media; D008031:Lignin; D010100:Oxygen