Department of Chemical Engineering, University of Almería, Ctra. Sacramento, s/n, 04120, La Cañada de San Urbano, Almería, Spain.
Dipartimento Di Scienze Della Vita E Biotecnologie, Università degli Studi di Ferrara, Via Savonarola, 9, 44121 Ferrara, FE, Italy.
J Biotechnol. 2018 Oct 20;284:102-114. doi: 10.1016/j.jbiotec.2018.08.006. Epub 2018 Aug 22.
The outdoor production of marine microalgae biomass in pilot scale flat panels photobioreactors, under not sterile conditions and using centrate as nutrients source, was studied. Experiments were performed modifying the centrate percentage, dilution rate and orientation of the photobioreactors. The strain Geitlerinema sp. was that one prevailing independently of the culture conditions. The higher productivity of 47.7 g m·day dry weight and photosynthetic efficiency of 2.8%, was achieved when using 20% centrate and a dilution rate of 0.3 day, whatever the orientation of the reactor, maximal nutrient removal capacities of 82%, 85% and 100% for carbon, nitrogen and phosphorus being obtained. Under non-optimal conditions up to 80% of the nitrogen and 60% of the phosphorus were lost by stripping and precipitation, respectively. Carbohydrates was the major component of the biomass followed by proteins and lipids. These results support the possibility to produce microalgae biomass below 0.59 €/kg, useful to produce biofertilizers and animal feed.
在非无菌条件下，使用浓缩液作为营养源，在中试规模的平板光生物反应器中进行了海洋微藻生物质的户外生产研究。通过改变浓缩液的百分比、稀释率和光生物反应器的方向来进行实验。无论培养条件如何，优势菌株均为 Geitlerinema sp. 当使用 20%的浓缩液和 0.3 天的稀释率时，可实现 47.7 g·m·day 干重和 2.8%的光合效率的最高生产力，对于碳、氮和磷，可分别获得 82%、85%和 100%的最大养分去除能力。在非最佳条件下，分别有高达 80%的氮和 60%的磷通过汽提和沉淀损失。生物质的主要成分是碳水化合物，其次是蛋白质和脂质。这些结果支持了在低于 0.59 欧元/公斤的价格下生产微藻生物质的可能性，这对于生产生物肥料和动物饲料很有用。
