In the last years, the acidothermophilic red microalga Galdieria sulphuraria has been increasingly studied for industrial applications such as wastewater treatment, recovery of rare earth elements, production of phycobilins. However, even now it is not possible an industrial cultivation of this organism because biotechnological research on G. sulphuraria and allied species is relatively recent and fragmented. Having in mind a possible scale-up for commercial applications, we have compared the growth and photosynthetic performance of G. sulphuraria in four suspended systems (Inclined bubble column, Decanter Laboratory Flask, Tubular Bioreactor, Ultra-flat plate bioreactor) and one immobilized system (Twin Layer Sytem). The results showed that G. sulphuraria had the highest growth, productivity and photosynthetic performance, when grown on the immobilized system, which also offers some economics advantages.

近年来，人们越来越多地研究嗜酸嗜热红色微藻Galdieria sulfuraria的工业应用，例如废水处理、稀土元素回收、藻胆素生产。然而，即使是现在，这种生物体的工业化种植也是不可能的，因为对硫磺菌和相关物种的生物技术研究相对较新且分散。考虑到商业应用可能扩大规模，我们比较了G. sulfuraria在四种悬浮系统（倾斜气泡塔、Decanter 实验室烧瓶、管式生物反应器、超平板生物反应器）和一种固定系统中的生长和光合性能（双层系统）。结果表明，当在固定化系统上生长时， G. sulfuraria具有最高的生长、生产力和光合性能，这也提供了一些经济优势。