BioChem - DOS

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

Bioresource technology : biomass, bioenergy, biowastes, conversion technologies, biotransformations, production technologies

Ryu, B.G.; Kim, K.; Kim, J.; Han, J.I.; Yang, J.W.

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 (6.69g/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 31.8g/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.

2013

Elsevier Applied Science

0960-8524

129

pp.351-359

10.1016/j.biortech.2012.11.049

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART65520742

Aurantiochytrium sp. KRS101; DHA; Spent yeast; Stepwise cultivation; Economic assessment