Use of organic waste from the brewery industry for high-density cultivation of the docosahexaenoic acid-rich microalga, Aurantiochytrium sp KRS101

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In the present study, spent yeast from a brewery was used as the growth substrate for the docosahexaenoic acid (DHA)-rich microalga, Aurantiochytrium sp. KRS101. A significant biomass yield (6.69 g/l/d) was obtained using only spent yeast as the growth substrate, with simple stirring as pretreatment. Maximization of nutrient utilization through the use of stepwise cultivation increased the yield to 31.8 g/l of biomass. DHA constituted 38.2% (w/w) of the total fatty acids, and the highest DHA productivity was observed when the C/N ratio was 20:1 (w/w). Spent yeast thus served as a good growth substrate for the production of DHA. Economic assessment revealed that stepwise cultivation using spent yeast as either the sole growth substrate or as a nutrient source could substantially reduce the production cost of microalgal DHA. (C) 2012 Elsevier Ltd. All rights reserved.
Publisher
ELSEVIER SCI LTD
Issue Date
2013-02
Language
English
Article Type
Article
Keywords

ALGA CRYPTHECODINIUM-COHNII; FED-BATCH CULTIVATION; SCHIZOCHYTRIUM SP; DHA PRODUCTION; OPTIMIZATION; CULTURE; RECOVERY; BIOMASS; SYSTEM; SR21

Citation

BIORESOURCE TECHNOLOGY, v.129, pp.351 - 359

ISSN
0960-8524
DOI
10.1016/j.biortech.2012.11.049
URI
http://hdl.handle.net/10203/189379
Appears in Collection
CE-Journal Papers(저널논문)CBE-Journal Papers(저널논문)
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