Abstract
Marine benthic diatoms have the capacity to produce quality biomass and bioactive compounds for various commercial applications. Amphora sp. NCC169 is one of such species that have high-value lipid production. However, mass-production of Amphora sp. NCC169 in traditional suspension photobioreactor is challenged by its sensitivity to stirring and turbulence. The aim of this study is to compare the biomass and lipid productivity of Amphora sp. NCC169 cultures between a Fernbach flask and a low-maintenance, laboratory-scale culture system adapted from previously described vertically oriented porous substrate bioreactor (PSBR) designs. Results revealed that cells in the PSBR could achieve significantly higher biomass productivity (Pbiomass = 0.51 ± 0.05 g·m−2·day−1) and lipid productivity (Plipid = 0.10 ± 0.03 g·m−2·day−1) than those in Fernbach flasks after 20 days of cultivation (Pbiomass = 0.29 ± 0.01 g m−2 day−1; Plipid = 0.07 ± 0.01 g·m−2·day−1). Cellular photosynthetic efficiency remained favorable in both culture conditions (Fv/Fm > 0.5) for the duration of the experiments.
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