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以ＣＯ２为碳源工业化生产螺旋藻的优点是：向培养液中添加ＣＯ２的同时，实现了对ｐＨ值和碳源的调控，碳源利用率高，生产成本低．以ＣＯ２吸收速率、ＣＯ２吸收率、ＣＯ２利用率为指标，对“气泡法”、“气罩法”添加ＣＯ２的优缺点进行了综合分析和定量研究。“气罩法”ＣＯ２吸收速率是４３．５３ｍｍｏｌ／（ｍ２·ｍｉｎ），ＣＯ２吸收率是８５％，为满足１０ｇ／（ｍ２·ｄ）产量对碳源的需要，气罩面积与培养池面积的比值是１．５％（每天充气１０ｈ。使用孔径为４０～５０μｍ的微孔塑料管，并用“气泡法”添加ＣＯ２，ＣＯ２吸收率是６７．５％，应用于大规模生产，ＣＯ２利用率是６５．３％。由于气罩制造材料和内壁密集水珠的遮光作用，设置气罩后几乎损失了相同大小的培养面积，致使ＣＯ２吸收率为８５％的“气罩法”在经济效益上与ＣＯ２吸收率只有４０％的不产生遮光的其它ＣＯ２添加工艺相当。ＣＯ２吸收率为６７．５％的“气泡法”完全达到了实用化的程度，与利用ＮａＨＣＯ３相比，可以降低碳源成本８０％。
The advantage of industrial production of spirulina with CO2 as carbon source is that while adding CO2 to the culture solution, the control of pH value and carbon source is realized, the carbon source utilization rate is high, and the production cost is low. Taking CO2 absorption rate, CO2 absorption rate and CO2 utilization rate as indexes, the advantages and disadvantages of “CO2 bubble method” and “CO2 method” were comprehensively analyzed and quantitatively studied. The CO2 absorption rate of the “hood method” is 43.53 mmol / (m2 · min) and the CO2 absorption rate is 85%. In order to meet the requirement of the carbon source for the output of 10 g / (m2 · d), the area of the hood and the area The ratio is 1.5% (aeration 10h per day. The use of microporous plastic tube with a pore size of 40 ~ 50μm, and “bubble method” to add CO2, CO2 absorption rate was 67.5%, for large-scale production, CO2 utilization is 65.3%. Due to the light-shielding effect of the material for making the gas mask and the dense water beads on the inner wall, almost the same area of culture area is lost after the gas mask is set so that the “gas hood method” with the CO2 absorption rate of 85% CO2 absorption rate of only 40% does not produce shading other CO2 addition process is equivalent to .CO2 absorption rate of 67.5% of the “bubble method” completely reached the practical level, compared with the use of NaHCO3, carbon source costs can be reduced 80 %.