This study was conducted with the aim of embedding circular economies (waste recycling) with photosynthetic biorefineries, for production of commercially viable by-products. Since nitrogen source constitute the major input costs for commercial Arthrospira sp. production, the use of nitrogen rich wastewater for Arthrospira sp. cultivation could significantly reduce their production costs. This study evaluated the effects of high concentrations (8.5–120 mM) of alternative nitrogen sources (urea, ammonium and nitrite) on the biochemical, pigment and proteomic profile of Arthrospira sp., under batch and continuous conditions. Arthrospira sp. cells fed with urea were quantified with modified biochemical and proteomic profile compared to the nitrate fed cells. No inhibitory effect of urea was observed on the biomass even at 120 mM. Nitrite fed cells exhibited comparable biochemical and proteomic profiles as nitrate fed cells. These results clearly indicated at the possibility of using urea rich wastewater streams for profitable cultivation of Arthrospira sp.

进行这项研究的目的是将循环经济（废物回收）与光合生物精炼厂结合在一起，以生产商业上可行的副产品。由于氮源构成商业节肢螺旋藻的主要投入成本。生产中，使用节肢螺旋藻富含氮的废水。种植可以大大降低其生产成本。这项研究评估了在分批和连续条件下，高浓度（8.5–120 mM）替代氮源（尿素，铵和亚硝酸盐）对节肢螺旋藻的生化，色素和蛋白质组学特性的影响。节肢动物sp。与硝酸盐喂养的细胞相比，尿素喂养的细胞具有改良的生化和蛋白质组学特征。即使在120mM下也未观察到尿素对生物质的抑制作用。亚硝酸盐喂养的细胞表现出与硝酸盐喂养的细胞相当的生化和蛋白质组学特征。这些结果清楚地表明，可以使用富含尿素的废水流来有利地种植节肢动物。