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Type: Artigo de periódico
Author: Silveira, E
Souza, ME
Santana, JCC
Chaves, AC
Porto, ALF
Tambourgi, EB
Abstract: This work focuses on the adsorption of Bromelain in expanded bed conditions, such as the adsorption kinetics parameters. The adsorption kinetics parameters showed that after 40 minutes equilibrium was achieved and maximum adsorption capacity was 6.11 U per resin mL. However, the maximum adsorption capacity was only determined by measuring the adsorption isotherm. Only by the Langmuir model the maximum adsorption capacity, Qm, and dissociation constant, kd, values could be estimated as 9.18 U/mL and 0.591, respectively, at 25 degrees C and 0.1 mol/L phosphate buffer pH 7.5. A column made of glass with an inner diameter of 1 cm was used for the expanded bed adsorption (EBA). The residence time was reduced 10 fold by increasing the expansion degree 2.5 times; nonetheless, the plate number (N) value was reduced only 2 fold. After adsorption, the bromelain was eluted in packed bed mode, with a downward flow. The purification factor was about 13 fold and the total protein was reduced 4 fold. EBA showed to be feasible for purification of bromelain.
Subject: Adsorption
Enzyme Activity
Axial Dispersion
Expanded Bed Adsorption
Country: Brasil
Editor: Brazilian Soc Chemical Eng
Citation: Brazilian Journal Of Chemical Engineering. Brazilian Soc Chemical Eng, v. 26, n. 1, n. 149, n. 157, 2009.
Rights: aberto
Date Issue: 2009
Appears in Collections:Unicamp - Artigos e Outros Documentos

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