Growth and lipid accumulation properties of microalgal Phaeodactylum tricornutum under different gas liquid ratios.
In this study, the effects of gas liquid ratio (GLR) on growth, lipid and fatty acid production of Phaeodactylum tricornutum were investigated. The positive linear relationships among specific growth rate, lipid content, fatty acid methyl ester content and GLR were built. GLR of 1.5vvm was considered as the optimum GLR for P. tricornutum growth and yielding oil, with highest biomass productivity (227.09mgL(-1)d(-1)), highest lipid productivity (48.48mgL(-1)d(-1)) and considerable amount fatty acids of saturated (50.16%) and monounsaturated (48.79%), which gave the finest compromise between oxidative stability and cold flow properties. pH variation was good controlled by the air bubbling velocity and algal photosynthesis. CO3(2-)/HCO3(-) ratio influenced the fatty acids synthesis, especially the component of C16:1. The average value of the most favorable composition C16:1 was 48.36%, which is comparable with other reports.
School of Environmental Science and Engineering, Shandong University, 27 Shanda Nan Road, Jinan 250100, China.
Mingming
M
Song
School of Environmental Science and Engineering, Shandong University, 27 Shanda Nan Road, Jinan 250100, China; Shandong Provincial Engineering Centre on Environmental Science and Technology, 17923 Jingshi Road, Jinan 250061, China. Electronic address: haiyanhup@126.com.
Haiyan
H
Pei
School of Environmental Science and Engineering, Shandong University, 27 Shanda Nan Road, Jinan 250100, China; Shandong Provincial Engineering Centre on Environmental Science and Technology, 17923 Jingshi Road, Jinan 250061, China.
Wenrong
W
Hu
School of Environmental Science and Engineering, Shandong University, 27 Shanda Nan Road, Jinan 250100, China.
Fei
F
Han
School of Environmental Science and Engineering, Shandong University, 27 Shanda Nan Road, Jinan 250100, China.
Yan
Y
Ji
School of Environmental Science and Engineering, Shandong University, 27 Shanda Nan Road, Jinan 250100, China.
Guixia
G
Ma
School of Environmental Science and Engineering, Shandong University, 27 Shanda Nan Road, Jinan 250100, China.
Lin
L
Han
D001639:Bicarbonates / Q000494:pharmacology; D018533:Biomass; D002254:Carbonates / Q000494:pharmacology; D004952:Esters / Q000378:metabolism; D005227:Fatty Acids / Q000378:metabolism; D005740:Gases / Q000494:pharmacology*; D006863:Hydrogen-Ion Concentration / Q000187:drug effects; D008027:Light; D050356:Lipid Metabolism / Q000187:drug effects* / Q000528:radiation effects; D058086:Microalgae / Q000187:drug effects / Q000254:growth & development* / Q000378:metabolism* / Q000528:radiation effects
D001639:Bicarbonates; D002254:Carbonates; D004952:Esters; D005227:Fatty Acids; D005740:Gases
Biomass productivity; Fatty acid profiles; Gas liquid ratio; Lipid productivity; Microalgae