title: Immobilization of Trametes versicolor cultures for improving laccase production in bubble column reactor intensified by sonication.
abstract: The mycelia of Trametes versicolor immobilized in alginate beads provided higher laccase production than that in pelleted form. An efficient ultrasonic treatment enhanced laccase production from the immobilized T. versicolor cultures. The optimized treatment process consisted of exposing 36-h-old bead cultures to 7-min ultrasonic treatments twice with a 12-h interval using a fixed ultrasonic power and frequency (120 W, 40 kHz). Using the intensification strategy with sonication, laccase production increased by more than 2.1-fold greater than the untreated control in both flasks and bubble column reactors. The enhancement of laccase production by ultrasonic treatment is related to the improved mass transfer of nutrients and product between the liquid medium and the gel matrix. These results provide a basis for the large-scale and highly-efficient production of laccase using sonobioreactors.
authors.affiliation: National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, People's Republic of China.
authors.forename: Feng
authors.initials: F
authors.lastname: Wang
authors.forename: Chen
authors.initials: C
authors.lastname: Guo
authors.forename: Chun-Zhao
authors.initials: CZ
authors.lastname: Liu
mesh_terms: D018914:Cells, Immobilized / Q000378:metabolism; D042845:Laccase / Q000096:biosynthesis*; D025282:Mycelium / Q000201:enzymology; D013010:Sonication; D055454:Trametes / Q000201:enzymology*; D014465:Ultrasonics
chemical_list: D042845:Laccase