title: Comparison of red microalgae (Porphyridium cruentum) culture conditions for bioethanol production.
abstract: Microalgae biomass are useful resources in biofuel production. The objective of this study was to evaluate bioethanol production in response to Porphyridium cruemtum culture conditions. Enzymatic hydrolysis of seawater P. cruemtum (SPC) and freshwater P. cruemtum (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 P. cruemtum can grow in freshwater conditions and is an efficient candidate for bioethanol production.
authors.affiliation: Bio-Energy Research Center, Chonnam National University, Gwangju 61186, Republic of Korea.
authors.forename: Ho Myeong
authors.initials: HM
authors.lastname: Kim
authors.affiliation: Department of Bioenergy Science and Technology, Chonnam National University, Gwangju 61186, Republic of Korea.
authors.forename: Chi Hoon
authors.initials: CH
authors.lastname: Oh
authors.affiliation: Bio-Energy Research Center, Chonnam National University, Gwangju 61186, Republic of Korea; Department of Bioenergy Science and Technology, Chonnam National University, Gwangju 61186, Republic of Korea. Electronic address: baehj@chonnam.ac.kr.
authors.forename: Hyeun-Jong
authors.initials: HJ
authors.lastname: Bae
mesh_terms: D056804:Biofuels; D000431:Ethanol; D005285:Fermentation; D006868:Hydrolysis; D058086:Microalgae; D044665:Porphyridium
chemical_list: D056804:Biofuels; D000431:Ethanol
keywords: Bioethanol; Microalgae; Porphyridium cruemtum; Simultaneous saccharification and fermentation (SSF)