title: [Influence of pH control on the production of curdlan by Alcaligenes faecalis strain].
abstract: A two-stage pH control method was employed in batch fermentation of curdlan by Alcaligenes faecalis WX-C12 where cell-growth stage was constantly controlled at pH 7.0 and stationary stage was controlled at a constant pH as well. The influence of pH control on the curdlan production was investigated. The optimal pH control of batch process for curdlan production was obtained when cell-growth stage was controlled at pH 7.0 and stationary stage was constantly controlled at pH 5.6. Production and productivity of curdlan, QP and YP/S reached 28.19 g/L, 291 mg/(L.h), 132.27 mg/(L.h.g) and 0.659, an improvement of 20.4%, 38.1%, 38.1% and 29.5% compared to a pH uncontrolled operation respectively.
authors.affiliation: Key Laboratory of Industrial Biotechnology of Ministry of Education, Southern Yangtze University, Wuxi 214036, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
authors.forename: Xiao-Bei
authors.initials: XB
authors.lastname: Zhan
authors.forename: Yi-Hui
authors.initials: YH
authors.lastname: Zhu
authors.forename: Zhen-Yu
authors.initials: ZY
authors.lastname: Li
authors.forename: Ye
authors.initials: Y
authors.lastname: Yang
mesh_terms: D000421:Alcaligenes / Q000254:growth & development / Q000378:metabolism*; D005285:Fermentation; D005936:Glucans / Q000096:biosynthesis*; D006863:Hydrogen-Ion Concentration; D047071:beta-Glucans
chemical_list: D005936:Glucans; D047071:beta-Glucans; C038459:curdlan