College of Geography and Environment, Shandong Normal University, Jinan, 250014, PR China; Dongying Institute, Shandong Normal University, Dongying 257092, Shandong, PR China.
College of Geography and Environment, Shandong Normal University, Jinan, 250014, PR China.
Environ Res. 2023 Oct 15;235:116638. doi: 10.1016/j.envres.2023.116638. Epub 2023 Jul 11.
Although filamentous algae have the characteristics of high nutrient assimilation ability, and adaptation to different conditions, studies on their role in water purification of constructed wetlands (CWs) are limited. In this study, the wastewater treatment capacity under different nitrogen sources was explored by constructing a filamentous algal CW (FACW) system. Results confirmed the fast and stable operation efficiency of the FACW system. Ammonia nitrogen was preferred in Cladophora sp. absorption and assimilation. The nutrient consumption rate (NCR) for total nitrogen (TN) of AG was 2.65 mg g d, much higher than that of nitrate nitrogen (NG) (0.89 mg g d). The symbiosis of bacteria and Cladophora sp. Contributed to pollutant removal. A stable and diverse community of microorganisms was found on Cladophora sp. Surface, which revealed different phylogenetic relationships and functional bacterial proportions with those attached on sediment surface. In addition, temperature and light intensity have great influence on the purification ability of plants, and low hydraulic retention time is beneficial to the cost-effective operation of the system. This study provides a method to expand the utilization of wetland plants and apply large filamentous algae to the purification of wetland water quality.
虽然丝状藻类具有高养分吸收能力和适应不同条件的特点，但关于它们在人工湿地（CWs）水质净化中的作用的研究有限。本研究通过构建丝状藻类人工湿地（FACW）系统，探讨了不同氮源下的废水处理能力。结果证实了 FACW 系统的快速和稳定运行效率。鱼腥藻对氨氮具有优先吸收和同化作用。鱼腥藻对总氮（TN）的养分消耗率（NCR）为 2.65mg g d，远高于硝态氮（NG）（0.89mg g d）。细菌和刚毛藻的共生有助于去除污染物。在刚毛藻表面发现了稳定且多样的微生物群落，其与附着在沉积物表面的微生物具有不同的系统发育关系和功能细菌比例。此外，温度和光照强度对植物的净化能力有很大影响，低水力停留时间有利于系统的经济高效运行。本研究提供了一种利用湿地植物和应用大型丝状藻类来净化湿地水质的方法。
