%0 Journal Article
%T Influences of Dissolved Inorganic Carbon and Nitrogen sources on Growth, Total Lipid Content and Calorific Value of Freshwater Oleaginous Microalga Ankistrodesmus falcatus (Corda) Ralfs
%A Jayanta Talukdar
%J Environmental Research, Engineering and Management
%D 2012
%I Technologija, Kaunas University of Technology
%R 10.5755/j01.erem.61.3.1423
%X Biofuel potentiality of a native Indian strain of the freshwater oleaginous microalgae A.falcatus was studied owing to its inherently high lipid content. Influences of media constituents, pH and nitrogen sources on growth (¦Ì), total lipid (TL) content and calorific value (CV) were compared in batch culture. Bold basal medium was superior (¦Ì = 0.498 d-1, TL = 43.6% and CV = 23.6 kJ/g) than BG11 (¦Ì = 0.385 d-1, TL = 38.5% and CV = 19.3 kJ/g). Medium pH (¡Ö 7.0) and NaHCO3 (30 mg/L), were found suitable for optimum growth at light intensity 35 ¦Ìmol/m2/s, temperature 25 ¡À 2 0C and 16 hrs light and 8 hrs dark diurnal cycles. NO3- instead of NH4+ was preferred in the range KNO3 > NaNO3 > NH4NO3 > Urea, for maximal biomass and lipid production. Maximum biomass, TL and CV (80 mg/L DCW and 42.4% and 20.6 kJ/g respectively) were determined in medium containing KNO3 (17.6 mM). A close correlation between increase in TL and CV was observed (r2 = 0.994). With further augmentations of TL and improved biomass yield the native microalga strain could be a potent candidate for biofuel production. DOI: http://dx.doi.org/10.5755/j01.erem.61.3.1423
%K Ankistrodesmus falcatus
%K Biofuel
%K Calorific value
%K Microalgae
%K Oleaginous
%U http://www.erem.ktu.lt/index.php/erem/article/view/1423