Lipids productivity of cyanobacterium Anabaena vaginicola in an internally illuminated photobioreactor using LED bar lights.

ABSTRACT: Concerns over environmental issues exists and desire to decrease of their extent, have directed efforts toward green energy production. Growth behavior of Anabaena vaginicola was determined in a photobioreator which illuminated internally (IIPBR) using LED bar light. Excessive heat generated in the IIPBR was taken care of by applying a novel air-cooled system. Further note in experimentation was to find favorable cultivation conditions in the IIPBR for A. vaginicola growth and its lipids production capacity. The following results are expressed: 80 µmol photons m^-2 s^-1 as light intensity, 0.5 g/l as NaNO₃, and 120 ml/min as CO₂ amount being expressed in terms of aeration rate. The findings were interpreted in terms of a two-component system where the genes encoded to the relevant proteins are present in cyanobacteria and their expressiveness depends on environmental stress. By determining growth rate constant as 0.11 d^-1, the productivity in terms of biomass formation was calculated as 202.6 mg L^-1 d^-1. While rate of lipids production by the test cyanobacterium is 15.65 mg L^-1 d^-1. Based on total energy used for IIPBR performance, biomass productivity per unit power input equals to 0.74 g W^-1 d^-1 and this is in favorable position compared with other photobioreactors.

SUBMITTER: Goldoost H 

PROVIDER: S-EPMC10957962 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature