The helix pitch and trichome length of Spirulina.sp were promoted to improve the biomass harvesting efficiency and CO₂ fixation rate in 660 m² raceway ponds aerated with food-grade CO₂ purified from a coal chemical flue gas. The CO₂ fixation rate was improved with increased trichome length of the Spirulina.sp in a raceway pond with double paddlewheels, baffles, and CO₂ aerators (DBA raceway pond). The trichome length has increased by 33.3 μm, and CO₂ fixation rate has increased by 42.3% and peaked to 51.3 g/m²/d in a DBA raceway pond. Biomass harvesting efficiency was increased with increased helix pitch. When the day-average greenhouse temperature was 33 °C and day-average sunlight intensity was 72,100 lux, the helix pitch of Spirulina.sp was increased to 56.2 μm. Hence the biomass harvesting efficiency was maximized to 75.6% and biomass actual yield was increased to 35.9 kg in a DBA raceway pond.

提高了螺旋藻的螺旋螺距和毛状体长度，以提高660 m ²用煤化工烟气净化的食品级CO ₂充气的水道池的生物量收获效率和CO ₂固定率。在螺旋桨池，双桨轮，挡板和CO ₂曝气器（DBA球池）中，螺旋藻的毛状体长度增加，从而提高了CO ₂固定率。毛线长度增加了33.3μm，CO ₂固定率增加了42.3％，并达到了51.3 g / m ^2的峰值。/ d在DBA赛道池塘中。生物质收获效率随着螺旋螺距的增加而增加。当日平均温室温度为33°C，日平均日照强度为72,100 lux时，螺旋藻的螺旋螺距增加到56.2μm 。因此，在DBA跑道池中，生物量的收获效率最大，达到75.6％，生物量的实际产量增加到35.9 kg。