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Lim, Hankwon
Sustainable Process Analysis, Design, and Engineering (SPADE)
Research Interests
  • Process analysis, Process design, Techno-economic analysis, Separation process, Reaction engineering, Computational fluid dynamics, Membrane reactor, H2 energy, Water electrolysis, Vanadium redox flow battery, Greenhouse gas reduction

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Energy-efficient pretreatments for the enhanced conversion of microalgal biomass to biofuels

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Title
Energy-efficient pretreatments for the enhanced conversion of microalgal biomass to biofuels
Author
Ha, Geon-SooEl-Dalatony, Marwa M.Kurade, Mayur B.Salama, El-SayedBasak, BikramKang, DonghoRoh, Hyun-SeogLim, HankwonJeon, Byong-Hun
Issue Date
2020-08
Publisher
ELSEVIER SCI LTD
Citation
BIORESOURCE TECHNOLOGY, v.309, pp.123333
Abstract
The physiological properties, including biochemical composition and cell wall thickness, of microalgal species have a remarkable effect on the pretreatment of biomass and its further conversion to biofuels. In the present study, multiple biofuels (bioethanol, higher alcohols (C3-C5), and biodiesel) were produced using energy-efficient microwave pretreatment, successive carbohydrate/protein fermentation, and lipid transesterification from three microalgal strains (Pseudochlorella sp., Chlamydomonas mexicana, and Chlamydomonas pitschmannii). The microwave pretreatment method required the lowest specific energy (5 MJ/kg) compared to ultrasound pretreatment. The proposed integrated approach achieved high conversion efficiency (46%) and maximum biomass utilization (93%) of C. mexicana with improved yields of bioethanol (0.46 g-ethanol/g-carbohydrates), higher alcohols (0.44 g-higher alcohols/g-proteins), and biodiesel (0.74 g-biodiesel/g-lipids). This study suggests that the application of an appropriate pretreatment method for microalgal strains having different physiological properties is essential for improving the extraction efficiency and conversion of biomass to biofuels with less waste production.
URI
https://scholarworks.unist.ac.kr/handle/201301/48337
URL
https://www.sciencedirect.com/science/article/pii/S0960852420306052?via%3Dihub
DOI
10.1016/j.biortech.2020.123333
ISSN
0960-8524
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