题目:  Effects of inorganic carbon concentration on carbon formation, nitrate utilization, biomass and oil accumulation of Nannochloropsis oculata CS 179

作者: Qiang Lin*, Na Gu, Junda Lin, Liangmin Huang, Lingling Tan

刊物: Bioresource Technology ,（IF=4.98，I区）

刊号: 2012,111, 353-359

摘要: This investigation examined the effects of the inorganic carbon concentration (4, 0.8 and 0 g/L NaHCO3) on the carbon formation, nitrate utilization, growth and fatty acids compositions of Nannochloropsis oculata  . The dissolved inorganic carbon (DIC) concentration in the three treatments decreased sharply during the first 6 days, and the percentage of dissolved organic carbon (DOC) (% of total organic carbon (TOC)) decreased with the depletion of the DIC. The   assimilation of the algae was correlated with the DIC concentration. The algae in the highest DIC treatment had the highest specific grow rate (0.0843 d−1) (P < 0.0001), and their biomass and fatty acid methyl esters (FAME) productivity were 84.00 and 9.69 mg/L/d, respectively (P < 0.0001). Contents of C16 and C18 series (% of FAME) were high and the C16:0 increased with the decrease of C18:1 during the cultivation. The iodine value (IV) of the algae was low at the low DIC media.

题目: Effect of ferric ion on nitrogen consumption, biomass and oil accumulation of a Scenedesmus rubescens-like microalga

作者: Qiang Lin*, Na Gu, Junda Lin

刊物: Bioresource Technology ,（IF=4.98，I区）

刊号: 2012,112, 242-247

摘要: This investigation examined the effects of ferric ion source and concentration on the biomass yield, fatty acid methyl esters (FAME) productivity and composition from Scenedesmus rubescens  -like microalga. The algae cultivated with  /EDTA had higher ash free dry biomass (AFDB) production and in vivo   chlorophyll a concentration than those with  and Fe3+–Cl− (P < 0.001). The high or low Fe2+ concentration can partly restrict the ammonia consumption, the AFDB and FAME accumulation. The algae at 1 mg/L Fe2+ concentration had the highest AFDB and FAME productivity (341.1 ± 25.8 and 107.8 ± 19.3 mg/L/d) (P < 0.001). The mean content of C16 and C18 series at all Fe2+ concentrations was 88.6% ± 2.9% of total FAME, and it decreased with the increase of Fe2+ concentrations. Among the fatty acids profiles, the contents of C18: 0, C18: 1n−7 and C18: 1n−9 are significantly changed under the different Fe2+ concentrations, but not the contents of C16 series.