title: Intensification of microalgae drying and oil extraction process by vapor recompression and heat integration.
abstract: Reducing energy penalty caused by drying and oil extraction is the most critical challenge in microalgae biodiesel production. In this study, vapor recompression and heat integration are utilized to optimize the performance of wet microalgae drying and oil extraction. In the microalgae drying stage, the hot exhaust stream is recompressed and coupled with wet microalgae to recover the condensate heat. In the oil extraction stage, the exergy rate of recovered solvent is also elevated by compressor and then exchanged heat with feed and bottom stream in the distillation column. Energy and mass balance of the intensified process is investigated and compared with the conventional microalgae drying-extraction process. The simulation results indicated that the total energy consumption of the intensified process can be saved by 52.4% of the conventional route.
authors.affiliation: Tianjin Key Laboratory of Indoor Air Environmental Quality Control, School of Environmental Science and Technology, Tianjin University, 92 Weijin Road, Nankai District, Tianjin, China; Key Laboratory of Efficient Utilization of Low and Medium Grade Energy (Tianjin University), Ministry of Education, Tianjin 300072, China.
authors.forename: Chunfeng
authors.initials: C
authors.lastname: Song
authors.affiliation: Tianjin Key Laboratory of Indoor Air Environmental Quality Control, School of Environmental Science and Technology, Tianjin University, 92 Weijin Road, Nankai District, Tianjin, China; Key Laboratory of Efficient Utilization of Low and Medium Grade Energy (Tianjin University), Ministry of Education, Tianjin 300072, China. Electronic address: liuql@tju.edu.cn.
authors.forename: Qingling
authors.initials: Q
authors.lastname: Liu
authors.affiliation: Tianjin Key Laboratory of Indoor Air Environmental Quality Control, School of Environmental Science and Technology, Tianjin University, 92 Weijin Road, Nankai District, Tianjin, China; Key Laboratory of Efficient Utilization of Low and Medium Grade Energy (Tianjin University), Ministry of Education, Tianjin 300072, China.
authors.forename: Na
authors.initials: N
authors.lastname: Ji
authors.affiliation: Key Laboratory of Efficient Utilization of Low and Medium Grade Energy (Tianjin University), Ministry of Education, Tianjin 300072, China.
authors.forename: Shuai
authors.initials: S
authors.lastname: Deng
authors.affiliation: Key Laboratory of Efficient Utilization of Low and Medium Grade Energy (Tianjin University), Ministry of Education, Tianjin 300072, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Zhao
authors.affiliation: Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1, Tennodai, Tsukuba, Ibaraki 305-8572, Japan.
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Kitamura
mesh_terms: D001709:Biotechnology / Q000191:economics / Q000379:methods*; D003890:Desiccation / Q000379:methods*; D006358:Hot Temperature; D058086:Microalgae / Q000378:metabolism*; D009821:Oils / Q000302:isolation & purification*; D014835:Volatilization
chemical_list: D009821:Oils
keywords: Drying; Heat integration; Microalgae; Oil extraction; Vapor recompression