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Cost-Effective and Efficient Production of Carbohydrates from an Alkalihalophilic Leptolyngbya sp. in a Photobioreactor with Periodical Mixing
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-09-18 , DOI: 10.1021/acssuschemeng.0c05499 Chenba Zhu 1, 2 , Jian Che 3 , Xiaoqian Zhai 1 , Jinghan Wang 1 , Fantao Kong 1 , Zhanyou Chi 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-09-18 , DOI: 10.1021/acssuschemeng.0c05499 Chenba Zhu 1, 2 , Jian Che 3 , Xiaoqian Zhai 1 , Jinghan Wang 1 , Fantao Kong 1 , Zhanyou Chi 1
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Using sodium bicarbonate (NaHCO3) as the carbon source makes it possible to decouple mixing and carbon supply in microalgae cultivation, and a periodical mixing may be sufficient to support rapid microalgae growth. To test this idea, growth of a screened Leptolyngbya sp. DUT 001 cultured with NaHCO3 was evaluated in a bubbling column photobioreactor. First, the culture medium of this strain was optimized as 25.2 g L–1 NaHCO3 and 0.5 g L–1 NaNO3, in which condition the achieved highest biomass productivity and carbohydrate content were 0.74 g L–1 d–1 and 75.7 ± 1.3%, respectively. Second, the effect of four periodical mixing modes of 6:2, 6:4, 6:6, and 6:10 (bubbling/stopping, s) on microalgae growth was investigated, and these cultures resulted in the highest biomass concentrations of 1.76 ± 0.03, 1.75 ± 0.04, 1.72 ± 0.05, and 1.66 ± 0.04 g L–1, respectively. Correspondingly, the highest carbohydrate contents were 56.5 ± 1.2, 63.0 ± 2.5, 64.7 ± 2.1, and 60.6 ± 2.5%, respectively. However, there was no significant difference between these values and those achieved in the control group with continuous mixing (P > 0.05), which was 1.82 ± 0.06 g L–1 and 59.3 ± 1.3%, respectively. These results showed that it is feasible to use periodical mixing in microalgae cultivation, which may significantly reduce the microalgae biomass production cost.
中文翻译：
从嗜碱性钩端螺旋体sp。节省成本和有效地生产碳水化合物。在定期混合的光生物反应器中
使用碳酸氢钠（NaHCO 3）作为碳源，可以使微藻培养中的混合与碳供应脱钩，并且定期混合可能足以支持微藻的快速生长。为了检验这个想法，筛选出的Leptolyngbya sp。的生长。在鼓泡柱光生物反应器中评估用NaHCO 3培养的DUT 001 。首先，将该菌株的培养基优化为25.2 g L –1 NaHCO 3和0.5 g L –1 NaNO 3，在这种情况下，获得的最高生物量生产力和碳水化合物含量为0.74 g L –1 d –1和75.7±1.3％。其次，研究了4：2、6：4、6：6和6:10的四种周期性混合模式（起泡/停止，s）对微藻生长的影响，这些培养物导致最高生物量浓度为1.76分别为±0.03、1.75±0.04、1.72±0.05和1.66±0.04 g L –1。相应地，最高碳水化合物含量分别为56.5±1.2、63.0±2.5、64.7±2.1和60.6±2.5％。然而，这些值与连续混合的对照组之间没有显着差异（P > 0.05），为1.82±0.06 g L –1和59.3±1.3％。这些结果表明在微藻培养中使用定期混合是可行的，这可以显着降低微藻生物质的生产成本。
更新日期：2020-10-12
中文翻译：
从嗜碱性钩端螺旋体sp。节省成本和有效地生产碳水化合物。在定期混合的光生物反应器中
使用碳酸氢钠（NaHCO 3）作为碳源，可以使微藻培养中的混合与碳供应脱钩，并且定期混合可能足以支持微藻的快速生长。为了检验这个想法，筛选出的Leptolyngbya sp。的生长。在鼓泡柱光生物反应器中评估用NaHCO 3培养的DUT 001 。首先，将该菌株的培养基优化为25.2 g L –1 NaHCO 3和0.5 g L –1 NaNO 3，在这种情况下，获得的最高生物量生产力和碳水化合物含量为0.74 g L –1 d –1和75.7±1.3％。其次，研究了4：2、6：4、6：6和6:10的四种周期性混合模式（起泡/停止，s）对微藻生长的影响，这些培养物导致最高生物量浓度为1.76分别为±0.03、1.75±0.04、1.72±0.05和1.66±0.04 g L –1。相应地，最高碳水化合物含量分别为56.5±1.2、63.0±2.5、64.7±2.1和60.6±2.5％。然而，这些值与连续混合的对照组之间没有显着差异（P > 0.05），为1.82±0.06 g L –1和59.3±1.3％。这些结果表明在微藻培养中使用定期混合是可行的，这可以显着降低微藻生物质的生产成本。
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