Institute of Technology and Life Sciences, Falenty, Al. Hrabska 3, 05-090, Raszyn, Poland.
Wrocław University of Environmental and Life Sciences, Department of Botany and Plant Ecology, Grunwaldzki Square 24a, 50-363, Wrocław, Poland.
Sci Rep. 2020 May 13;10(1):7915. doi: 10.1038/s41598-020-64656-3.
The methods of separation of microalgae has a significant impact in the economic aspects of their cultivation. In this study, pine bark was used as a substrate for immobilization of microalgal biomass cultivated in raw municipal sewage. The experiment was conducted in cylindrical photobioreactors (PBRs) with circulation of wastewater. Biomass was cultivated for 42 days. After that time, abundant growth of the biofilm with microalgae on the surface of pine bark as well as improvement of the quality of treated sewage were observed. The efficiency of removal of nutrients from wastewater was 64-81% for total nitrogen and 97-99% for total phosphorus. Moreover, the concentration of suspended solids in sewage was reduced, which resulted in a decrease in turbidity by more than 90%. Colorimetric analysis and Volatile Matter (VM) content in the substrate showed a decrease in the Higher Heating Value (HHV) and concentration of VM due to the proliferation of biofilm.
微藻分离方法对其培养的经济方面有重大影响。在本研究中，采用松皮作为基质来固定在原城市污水中培养的微藻生物量。实验在带有废水循环的圆柱形光生物反应器（PBR）中进行。生物量培养了 42 天。此后，观察到松皮表面的生物膜上有大量的微藻生长，并且处理后的污水质量也得到了改善。废水中总氮的去除效率为 64-81%，总磷的去除效率为 97-99%。此外，污水中的悬浮固体浓度降低，浊度降低了 90%以上。色度分析和基质中的挥发性物质（VM）含量表明，由于生物膜的增殖，高位热值（HHV）和 VM 浓度降低。
