title: [Studies on simultaneous production of chitosanase and chitosan degradation in situ with Trichoderma reesei in convoluted fibrous bed bioreactor].
abstract: The cells of Trichoderma reesei were immobilized on a roll of porous polyurethane foam sheet and packed in a bubble column bioreactor for simultaneous production of chitosanase and degradation of chitosan in situ. The average degree of polymerization could be regulated by reaction time. Under the repeated-batch process with 2% soluble chitosan at pH4.8, 28 degrees C, the activity of chitosanase for each batch was above 0.15 IU/mL, the average yield of reducing sugar as D-glucosamine reached 73%. The novel immobilized bioreactor system run stably and effectively in the successive 10 batches lasting 30 days without notable change in the activity and productivity.
authors.affiliation: Institute of Bioengineering, Zhejiang University, Hangzhou.
authors.forename: M B
authors.initials: MB
authors.lastname: Wu
authors.forename: L M
authors.initials: LM
authors.lastname: Xia
authors.forename: P L
authors.initials: PL
authors.lastname: Cen
mesh_terms: D019149:Bioreactors; D002686:Chitin / Q000031:analogs & derivatives* / Q000378:metabolism; D048271:Chitosan; D006026:Glycoside Hydrolases / Q000096:biosynthesis*; D014242:Trichoderma / Q000378:metabolism*
chemical_list: D002686:Chitin; D048271:Chitosan; D006026:Glycoside Hydrolases; C019868:chitosanase