title: Energy conversion analysis of microalgal lipid production under different culture modes.
abstract: Growth and lipid production performance of Scenedesmus sp. under different culture modes were investigated. Under heterotrophic aerobic mode, algal biomass concentration and total lipid content reached 3.42 g L(-1) and 43.0 wt.%, which were much higher than those in autotrophic aerobic mode (0.55 g L(-1)/20.2 wt.%). The applied light exposure of 7.0 Wm(-2) was beneficial to biomass and lipid accumulation. Mixotrophic aerobic mode produced the highest biomass concentration of 3.84 g L(-1). The biomass was rich in lipids (51.3 wt.%) and low in proteins (17.9 wt.%) and carbohydrates (10.3 wt.%). However, lower algal biomass concentration (2.93 g L(-1)) and total lipid content (36.1 wt.%) were obtained in mixotrophic anaerobic mode. Mixotrophic aerobic mode gave the maximum heat value conversion efficiency of 45.7%. These results indicate that mixotrophic aerobic cultivation was a promising culture mode for lipid production by Scenedesmus sp.
authors: State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
authors: Hong-Yu
authors: HY
authors: Ren
authors: State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China. Electronic address: lbf@hit.edu.cn.
authors: Bing-Feng
authors: BF
authors: Liu
authors: State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
authors: Fanying
authors: F
authors: Kong
authors: State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
authors: Lei
authors: L
authors: Zhao
authors: State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
authors: Guo-Jun
authors: GJ
authors: Xie
authors: State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China. Electronic address: rnq@hit.edu.cn.
authors: Nan-Qi
authors: NQ
authors: Ren
mesh_terms: D061249:Batch Cell Culture Techniques; D018533:Biomass; D003246:Conservation of Energy Resources; D050356:Lipid Metabolism; D058086:Microalgae / Q000737:chemistry* / Q000378:metabolism
keywords: Anaerobic condition; Energy conversion; Light intensity; Lipid accumulation; Microalgal cultivation