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Development of a multi-stage continuous fermentation strategy for docosahexaenoic acid production by Schizochytrium sp.
Bioresour Technol ; 269: 32-39, 2018 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-30149252
ABSTRACT
Docosahexaenoic acid (DHA) has wide-ranging benefits for normal development of the visual and nervous systems in infants. A sustainable source of DHA production through fermentation using Schizochytrium sp. has been developed. In this paper, we present the discovery of growth-uncoupled DHA production by Schizochytrium sp. and the development of corresponding kinetic models of fed-batch fermentations, which can be used to describe and predict the cell growth and substrate utilization as well as lipid and DHA production. Based on this kinetic model, a predictive model of multi-stage continuous fermentation process was established and used to analyze, optimize and design the process parameters. Optimal predicted processes of two-stage and three-stage continuous fermentation were developed and verified in lab-scale bioreactor based on the predicted process parameters. A successful three-stage continuous fermentation was achieved, which increased the lipid, DHA content and DHA productivity by 47.6, 64.3 and 97.1%, respectively, compared with two-stage continuous fermentation.
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Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Assunto principal: Ácidos Docosa-Hexaenoicos / Estramenópilas / Fermentação Aspecto clínico: Predição / Prognóstico Idioma: Inglês Revista: Bioresour Technol Assunto da revista: Engenharia Biomédica Ano de publicação: 2018 Tipo de documento: Artigo