Enhanced microbial lipid production by Cryptococcus albidus in thehigh-cell-density continuous cultivation with membrane cell recycling and two-stage nutrient limitation

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As a potential feedstock for biofuel production, a high-cell-density continuous culture for the lipid production by Cryptococcus albidus was investigated in this study. The influences of dilution rates in the single-stage continuous cultures were explored first. To reach a high-cell-density culture, a single-stage continuous culture coupled with a membrane cell recycling system was carried out at a constant dilution rate of 0.36/h with varied bleeding ratios. The maximum lipid productivity of 0.69g/L/h was achieved with the highest bleeding ratio of 0.4. To reach a better lipid yield and content, a two-stage continuous cultivation was performed by adjusting the C/N ratio in two different stages. Finally, a lipid yield of 0.32g/g and lipid content of 56.4% were obtained. This two-stage continuous cultivation, which provided a higher lipid production performance, shows a great potential for an industrial-scale biotechnological production of microbial lipids and biofuel production.
Publisher
SPRINGER HEIDELBERG
Issue Date
2018-12
Language
English
Article Type
Article
Citation

JOURNAL OF INDUSTRIAL MICROBIOLOGY & BIOTECHNOLOGY, v.45, no.12, pp.1045 - 1051

ISSN
1367-5435
DOI
10.1007/s10295-018-2081-x
URI
http://hdl.handle.net/10203/248250
Appears in Collection
CBE-Journal Papers(저널논문)
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