Abstract
The enzymatic deinking process was developed in two stages,
the first one was the enzyme pretreatment and the second
one the subsequent flotation deinking, both conducted at
pH = 5.5 and temperature = 55ºC. Other process parameters
were: enzyme concentration = 1545.96 FPU, air flow rate of
0.5L/min, and Na2SiO3 concentration of 48.65 Be. The optimal
deinking conditions were: Enzyme dosage of 0.15%, enzymatic
action time of 20 min, flotation consistency of 0.5%, whereby the
70% of essays reached ISO brightness over 70%, with a maximum
value of 80% and an average yield of 90%.
Authors*: Andrés M. Dovale S.
Hader H. Alzate G.
Jorge A. Velásquez J.
Germán C. Quintana M.
* Authors’ references:
Universidad Pontificia Bolivariana, Research Group of Pulp & Paper – Faculty of Chemical Engineering. Circular 1 N° 70-01, Bloque 11, oficina 251.
Medellín. Colombia – http://www.upb.edu.co
Teléfono: (574) 448 83 88 ext 14118; Fax: (574) 411 97 76
Corresponding author: Hader H. Alzate G. – E-mail: [email protected]
The enzymatic deinking process was developed in two stages,
the first one was the enzyme pretreatment and the second
one the subsequent flotation deinking, both conducted at
pH = 5.5 and temperature = 55ºC. Other process parameters
were: enzyme concentration = 1545.96 FPU, air flow rate of
0.5L/min, and Na2SiO3 concentration of 48.65 Be. The optimal
deinking conditions were: Enzyme dosage of 0.15%, enzymatic
action time of 20 min, flotation consistency of 0.5%, whereby the
70% of essays reached ISO brightness over 70%, with a maximum
value of 80% and an average yield of 90%.
Authors*: Andrés M. Dovale S.
Hader H. Alzate G.
Jorge A. Velásquez J.
Germán C. Quintana M.
* Authors’ references:
Universidad Pontificia Bolivariana, Research Group of Pulp & Paper – Faculty of Chemical Engineering. Circular 1 N° 70-01, Bloque 11, oficina 251.
Medellín. Colombia – http://www.upb.edu.co
Teléfono: (574) 448 83 88 ext 14118; Fax: (574) 411 97 76
Corresponding author: Hader H. Alzate G. – E-mail: [email protected]
