title: Batch, fed-batch and repeated fed-batch fermentation processes of the marine thraustochytrid Schizochytrium sp. for producing docosahexaenoic acid.
abstract: Different fermentation processes, including batch, fed-batch and repeated fed-batch processes by Schizochytrium sp., were studied and compared for the effective DHA-rich microbial lipids production. The comparison between different fermentation processes showed that fed-batch process was a more efficient cultivation strategy than the batch process. Among the four different feeding strategies, the glucose concentration feed-back feeding strategy had achieved the highest fermentation results of final cell dry weight, total lipids content, DHA content and DHA productivity of 72.37, 48.86, 18.38 g l(-1) and 138.8 mg l(-1) h(-1), respectively. The repeated fed-batch process had the advantages of reducing the time and cost for seed culture and inoculation between each fermentation cycles. The results of fermentation characteristics and lipid characterization of the repeated fed-batch process indicated that this repeated fed-batch process had promising industrialization prospect for the production of DHA-rich microbial lipids.
authors.affiliation: State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing University of Technology, No. 5 Xinmofan Road, Nanjing, 210009, People's Republic of China.
authors.forename: Liang
authors.initials: L
authors.lastname: Qu
authors.forename: Lu-Jing
authors.initials: LJ
authors.lastname: Ren
authors.forename: Guan-Nan
authors.initials: GN
authors.lastname: Sun
authors.forename: Xiao-Jun
authors.initials: XJ
authors.lastname: Ji
authors.forename: Zhi-Kui
authors.initials: ZK
authors.lastname: Nie
authors.forename: He
authors.initials: H
authors.lastname: Huang
mesh_terms: D003470:Culture Media; D004281:Docosahexaenoic Acids / Q000096:biosynthesis*; D005285:Fermentation; D008386:Marine Biology; D058009:Stramenopiles / Q000378:metabolism*
chemical_list: D003470:Culture Media; D004281:Docosahexaenoic Acids