BioChem - DOS

Nutritional mode influences lipid accumulation in microalgae with the function of carbon sequestration and nutrient supplementation

Bioresource technology : biomass, bioenergy, biowastes, conversion technologies, biotransformations, production technologies

Prathima Devi, M.; Swamy, Y.V.; Venkata Mohan, S.

Effect of nutritional mode viz., photoautotrophic, photoheterotrophic and photomixotrophic on the biomass growth and lipid productivity of microalgae was studied. Experiments were designed and operated in biphasic mode i.e., growth phase (GP) followed by stress induced starvation phase (SP). Nutritional mode documented marked influence on biomass growth and subsequent lipid productivity. Mixotrophic mode of operation showed higher biomass growth (4.45mg/ml) during growth phase while higher lipid productivity was observed with nitrogen deprived autotrophic mode (28.2%) followed by heterotrophic (26.1%) and mixotrophic (19.6%) operations. Relative increments in lipid productivities were noticed in SP operation from GP in mixotrophic operation (2.45) followed by autotrophic (2.2) and heterotrophic (2.14) mode of operations. Higher concentrations of chlorophyll b and presence of lipid accumulating species supported the lipid biosynthesis. Algal fatty acid composition varied with function of nutritional modes and depicted eighteen types of saturated (SFA) and unsaturated fatty acids (USFA) with wide fuel and food characteristics.

2013

Elsevier Applied Science

0960-8524

142

pp.278-286

10.1016/j.biortech.2013.05.001

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART66285305

Algal lipid; Biodiesel; Wastewater treatment; Heterotrophic cultivation; Mixotrophic cultivation