Comparison of red microalgae (<i>Porphyridium cruentum</i>) culture conditions for bioethanol production

다국어 초록 (Multilingual Abstract)

<P><B>Abstract</B></P> <P>Microalgae biomass are useful resources in biofuel production. The objective of this study was to evaluate bioethanol production in response to <I>Porphyridium cruemtum</I> culture conditions. Enzymatic hydrolysis of seawater <I>P. cruemtum</I> (SPC) and freshwater <I>P. cruemtum</I> (FPC, 1% substrate loading, w/v) resulted in glucose conversion yields of 89.8 and 85.3%, respectively, without any pretreatment. However, FPC hydrolysate was more efficiently converted to ethanol about 7.1% than SPC hydrolysate. The comparison of separate hydrolysis and fermentation (SHF) and simultaneous saccharification and fermentation (SSF) showed that SSF processing is a superior method for bioethanol production from both SPC and FPC. Though SSF processing (5% substrate loading, w/v) in a 500-mL twin-neck round bottom flask, we achieved ethanol conversion yields of 65.4 and 70.3% from SPC and FPC, respectively, after 9h. These findings indicate that <I>P. cruemtum</I> can grow in freshwater conditions and is an efficient candidate for bioethanol production.</P> <P><B>Highlights</B></P> <P> <UL> <LI> <I>Porphyridium cruemtum</I> (PC) can grow in seawater and freshwater conditions. </LI> <LI> Freshwater <I>P. cruemtum</I> (FPC) biomass can efficiently produce the bioethanol. </LI> <LI> SSF process was superior to SHF process for bioethanol production from PC. </LI> </UL> </P>