title: Biochemical features and bioethanol production of microalgae from coastal waters of Pearl River Delta.
abstract: This study describes identification, cultivation, monitoring of carbohydrate accumulation and bioethanol production from microalgal strains from the coastal waters of Pearl River Delta. Eighteen identified strains belong to the families Chlorellaceae, Scotiellocystoidaceae, Neochloridaceae, Selenastraceae and Scenedesmaceae. Of isolated strains Mychonastes afer PKUAC 9 and Scenedesmus abundans PKUAC 12 were selected for further biomass and ethanol production analysis. Comparison of three cultivation modes (stationary, shaken and aerated) resulted in the highest biomass productivity obtained for aerated cultures that yielded 0.09 g and 0.11 g dry weight per day per litre of medium for M. afer PKUAC 9 and S. abundans PKUAC 12, respectively. Carbohydrate accumulation monitored by FTIR showed that early stationary phase is optimal for biomass harvest. Microalgal biomass was successfully used as a carbohydrate feedstock for fermentative bioethanol production. S. abundans PKUAC 12 was superior feedstock for bioethanol production when pre-treated with the combination of dilute acid treatment and cellulase.
authors.affiliation: Shenzhen Engineering Laboratory for Algal Biofuel Technology Development and Application, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Guo
authors.forename: Maurycy
authors.initials: M
authors.lastname: Daroch
authors.forename: Lei
authors.initials: L
authors.lastname: Liu
authors.forename: Guoyu
authors.initials: G
authors.lastname: Qiu
authors.forename: Shu
authors.initials: S
authors.lastname: Geng
authors.forename: Guangyi
authors.initials: G
authors.lastname: Wang
mesh_terms: D000681:Amylases / Q000378:metabolism; D001483:Base Sequence; D056804:Biofuels; D002241:Carbohydrates / Q000096:biosynthesis*; D018929:Cell Culture Techniques / Q000379:methods*; D002480:Cellulase / Q000378:metabolism; D002681:China; D017931:DNA Primers / Q000235:genetics; D000431:Ethanol / Q000378:metabolism*; D006868:Hydrolysis; D016013:Likelihood Functions; D058086:Microalgae / Q000235:genetics / Q000378:metabolism*; D008957:Models, Genetic; D008969:Molecular Sequence Data; D010802:Phylogeny; D012150:Polymorphism, Restriction Fragment Length; D012337:RNA, Ribosomal, 18S; D045483:Rivers / Q000382:microbiology*; D044444:Scenedesmus / Q000235:genetics / Q000378:metabolism*; D017422:Sequence Analysis, DNA; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D056804:Biofuels; D002241:Carbohydrates; D017931:DNA Primers; D012337:RNA, Ribosomal, 18S; D000431:Ethanol; D000681:Amylases; D002480:Cellulase