Feasibility of CO2 mitigation and carbohydrate production by microalga Scenedesmus obliquus CNW-N used for bioethanol fermentation under outdoor conditions: effects of seasonal changes

Table 2 Comparison of biomass productivity, carbohydrate productivity, and CO₂ fixation rate of S. obliquus CNW-N grown under different weather conditions in outdoor surroundings

Weather condition	Avg. light intensity (μmol m⁻²s⁻¹)	Avg. water temperature (^oC)	Biomass productivity (mg L⁻¹d⁻¹)	Carbohydrate (glucose) productivity (mg L⁻¹d⁻¹)	CO₂ fixation rate (mg L⁻¹d⁻¹)^a
Rainy (Typhoon)	182.2	29.1	183.8 ± 18.6	80.8 ± 6.9 (64.6 ± 5.3)	321.7 ± 32.6
Sunny	270.8	31.9	245.8 ± 27.9	111.8 ± 13.6 (90.8 ± 9.9)	430.2 ± 48.8
Cold	52.0	20.2	114.9 ± 20.1	45.0 ± 5.9 (33.9 ± 4.9)	201.1 ± 35.2

Values are the mean ± standard deviation of three replicated experiments. (CO₂ feeding concentration = 2.5%; working volume = 60 L.)
^aCalculated from the following equation: CO₂ fixation rate = Biomass productivity (mg L⁻¹d⁻¹) × C(%) × 44/12

ISSN: 2731-3654