title: Bacterial cellulose production by Gluconacetobacter sp. PKY5 in a rotary biofilm contactor.
abstract: A rotary biofilm contactor (RBC) inoculated with Gluconacetobacter sp. RKY5 was used as a bioreactor for improved bacterial cellulose production. The optimal number of disk for bacterial cellulose production was found to be eight, at which bacterial cellulose and cell concentrations were 5.52 and 4.98 g/L. When the aeration rate was maintained at 1.25 vvm, bacterial cellulose and cell concentrations were maximized (5.67 and 5.25 g/L, respectively). The optimal rotation speed of impeller in RBC was 15 rpm. When the culture pH in RBC was not controlled during fermentation, the maximal amount of bacterial cellulose (5.53 g/L) and cells (4.91 g/L) was obtained. Under the optimized culture conditions, bacterial cellulose and cell concentrations in RBC reached to 6.17 and 5.58 g/L, respectively.
authors.affiliation: Department of Material Chemical and Biochemical Engineering, Chonnam National University, 500-757, Gwangju, Korea.
authors.forename: Yong-Jun
authors.initials: YJ
authors.lastname: Kim
authors.forename: Jin-Nam
authors.initials: JN
authors.lastname: Kim
authors.forename: Young-Jung
authors.initials: YJ
authors.lastname: Wee
authors.forename: Don-Hee
authors.initials: DH
authors.lastname: Park
authors.forename: Hwa-Won
authors.initials: HW
authors.lastname: Ryu
mesh_terms: D018441:Biofilms / Q000254:growth & development*; D019149:Bioreactors / Q000382:microbiology*; D018929:Cell Culture Techniques / Q000379:methods*; D049109:Cell Proliferation; D002482:Cellulose / Q000378:metabolism*; D020576:Gluconobacter / Q000254:growth & development* / Q000378:metabolism*; D012399:Rotation
chemical_list: D002482:Cellulose