College of Water Sciences, Beijing Normal University, Beijing, 100875, China.
State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
Environ Sci Pollut Res Int. 2021 Mar;28(11):13861-13872. doi: 10.1007/s11356-020-11553-x. Epub 2020 Nov 16.
Cultivation of desert cyanobacteria in wastewater can lead to the optimal redistribution of regional resources and is likely to solve two global problems, i.e., wastewater pollution and desertification. However, the potential of using wastewater instead of traditional artificial culture media to cultivate sand-consolidating cyanobacteria for desert management is not well understood. This study compares undistilled and distilled wastewater with an artificial culture medium (BG11) to explore the potential of wastewater as a replacement culture medium for Scytonema javanicum. The results show that the photosynthetic activity (F/F) of S. javanicum was inhibited in the undistilled wastewater and was lower than that in distilled water and the culture medium. The lowest Chl-a concentration and the highest concentration in BG11 were found in distilled wastewater. However, there was no difference in the biomass (dry weight) between the undistilled wastewater and BG11 at the end of the experiment. After long-term dry storage of the biomass collected after cultivation, there was no difference in the photosynthetic recovery between S. javanicum cultivated in undistilled wastewater and that cultivated in BG11. Accordingly, although wastewater depressed the Chl-a content, it did not affect the biomass accumulation and subsequent photosynthetic recovery after long-term storage. The results reveal the significant potential of cultivating sand-consolidating cyanobacterium in wastewater and using this technology as a new nutrient redistribution method in human settlements and desert areas.
在废水 中培养 沙漠蓝藻可以实现区域资源的最佳再分配，并且很可能解决两个全球性问题，即废水污染和沙漠化。然而，利用废水替代传统人工培养基来培养固沙蓝藻以进行沙漠治理的潜力尚未得到充分认识。本研究比较了未蒸馏和蒸馏废水与人工培养基（BG11），以探讨废水作为沙 地念珠藻培养替代培养基的潜力。结果表明，未蒸馏废水中的沙地念珠藻光合作用活性（F/F）受到抑制，低于蒸馏水和培养基中的光合作用活性。在蒸馏废水中发现最低的 Chl-a 浓度和 BG11 中的最高浓度。然而，在实验结束时，未蒸馏废水和 BG11 之间的生物量（干重）没有差异。在培养后收集的生物量进行长期干燥储存后，在未蒸馏废水中培养的沙地念珠藻和在 BG11 中培养的沙地念珠藻之间的光合恢复没有差异。因此，尽管废水会抑制 Chl-a 含量，但不会影响长期储存后的生物量积累和随后的光合恢复。这些结果揭示了在废水中培养固沙蓝藻的巨大潜力，并为人类住区和沙漠地区的新养分再分配方法提供了这项技术。
