Effects of suspended solids in natural seawater on microalgal biomass productivity = Effects of suspended solids in natural seawater on microalgal biomass productivity

다국어 초록 (Multilingual Abstract)

Suspended solids, with various sizes, in seawater, may affect algal biomass productivity or not. In the previous research, biomass productivity of microalgae was enhanced by filtering all SSs using microfiltration. In this research, the fractionated SSs by their sizes were tested to find the effect of each fraction on the growth of a microalga, Tetraselmis sp. KCTC12433BP. The SSs were fractionated by filtration with glass microfiber filters, which pore sizes were 0.2 μm (A), 0.7 μm (B), 1.2 μm (C), and 3.0 μm (D). Each fractions were put into the f/2-Si medium with natural seawater. The highest overall biomass productivity, 0.10 g/L/day, was obtained from D fraction group, and the cultures with B, C, and A fraction groups followed after. In the control group, containing all SSs, the biomass productivity was decreased by 61%. Some suspended solids, the size ranges from 1.2 μm to 3.0 μm, look as if they have advantageous effect, while the other SSs that larger than 3.0 μm look as if they have disadvantageous effect on the microalgal growth. Further studies will be on analyzing the constituents.