title: NaCl as an effective inducer for lipid accumulation in freshwater microalgae Desmodesmus abundans.
abstract: In order to evaluate the efficiency and potential of salt addition-based two-stage cultivation technology, on the basis of urea as nitrogen source, we compared four types of salts (NaCl, NaHCO3, NaS2O3 and NaAc) as inducers for lipid production in Desmodesmus abundans. The maximum biomass productivity (270.08mgL(-1)d(-1)) was obtained by using 0.25gL(-1) urea. The highest lipid productivity (67.08mgL(-1)d(-1)) and better biodiesel quality were realized by addition of 20gL(-1) NaCl, and the optimal time point for salt addition was determined at 1.79gL(-1) of biomass density. Further cost analysis demonstrated this cultivation process was relatively economical. Above results suggest that NaCl addition is an economical and applicable strategy for lipid enhancement and can be extended for microalgae-based biodiesel production.
authors.affiliation: Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Ling
authors.initials: L
authors.lastname: Xia
authors.affiliation: SINOPEC Research Institute of Petroleum Processing, Beijing 100083, China.
authors.forename: Junfeng
authors.initials: J
authors.lastname: Rong
authors.affiliation: Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Haijian
authors.initials: H
authors.lastname: Yang
authors.affiliation: Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Qiaoning
authors.initials: Q
authors.lastname: He
authors.affiliation: Department of Biological Science and Biotechnology, Wuhan University of Technology, Wuhan 430070, China.
authors.forename: Delu
authors.initials: D
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China. Electronic address: cxhu@ihb.ac.cn.
authors.forename: Chunxiang
authors.initials: C
authors.lastname: Hu
mesh_terms: D056804:Biofuels; D018533:Biomass; D000460:Chlorophyta / Q000187:drug effects / Q000378:metabolism*; D050356:Lipid Metabolism / Q000187:drug effects*; D058086:Microalgae / Q000187:drug effects / Q000378:metabolism*; D012965:Sodium Chloride / Q000494:pharmacology*; D014508:Urea / Q000378:metabolism
chemical_list: D056804:Biofuels; D012965:Sodium Chloride; D014508:Urea
keywords: Cost feasibility; Desmodesmus abundans; Lipid induction; NaCl; Net energy ratio