FARIÑA Julia Ines
Biopulping of wood chips with Phlebia brevispora BAFC 633 reduces lignin content and improves pulp quality
FONSECA MI; FARIÑA JI; CASTRILLO ML; RODRÍGUEZ MD; NUÑEZ CE; VILLALBA LL; ZAPATA PD
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
ELSEVIER SCI LTD
Lugar: Amsterdam; Año: 2014 vol. 90 p. 29 - 29
Abstract: The white rot fungus Phlebia brevispora BAFC 633 produces laccases in large proportions. In the present work P. brevispora BAFC 633 was grown on Pinus taeda wood chips in 10 L bioreactors. To select the biopulping experimental conditions, we analyzed the variables affecting enzymatic laccase activity in the culture supernatants, indicating that the suitable incubation temperature was 30°C in order to promote enzyme stability. P. brevispora BAFC 633 secreted 744 U/g of laccase removing selectively lignin during biotreatment of wood chips, causing a reduction in Kappa number and 10% weight loss , creating a more open structure and better access to the pulping liquor, which would require less chemical consumption, diminishing the environmental impact of chemical pulping process. These results support the biotechnological potential of P. brevispora BAFC 633 for biopulping processes and enhance the potential for bioprospecting native isolates of the microflore of our country´s natural environment.