Institute of Environmental Engineering, Wrocław University of Environmental and Life Sciences, Wrocław, Poland.
Environ Technol. 2020 Jun;41(16):2024-2036. doi: 10.1080/09593330.2018.1554007. Epub 2018 Dec 5.
Effective removal of nitrogen and phosphorus from sewage before its discharge to the receiving water body is now a key task for scientists and technologists around the world. The widespread problem of eutrophication in the watercourses as well as in the seas and oceans obliges to take actions leading to more effective protection of water resources and implementation of sustainable development principles. One of the methods of increased wastewater treatment from nutrients is the use of a third stage of treatment with the use of macrophytes for the uptake of nitrogen and phosphorus. These systems, called hydroponic, under moderate climate conditions show little effectiveness due to the lack of sufficient light intensifying the growth of aquatic plants. The aim of this study was to evaluate the reduction of biogenic compounds concentrations in wastewater where additional lighting of plants was provided by the use of LED (Light Emitting Diodes), in two different conditions of experiment: with aeration and with carbon dioxide supplementation. Analyses show that the effectiveness of purification was higher in the wastewater supplemented with CO and artificial lighting had no significant influence on the reduction of nitrogen forms concentrations. In wastewater with aeration, higher effectiveness of nitrogen removal was observed in the tank with artificial lighting. In both cases, aeration or CO supplementation as well as artificial lighting or its lack, had no influence on total phosphorus and phosphates removal.
在将污水排放到受纳水体之前，有效地去除其中的氮和磷，现在是全世界科学家和技术人员的一项关键任务。由于富营养化问题在水道、海洋和海洋中普遍存在，因此必须采取行动，以更有效地保护水资源和实施可持续发展原则。增加污水中营养物处理的方法之一是使用第三级处理，利用大型植物吸收氮和磷。这些被称为水培的系统，在温和的气候条件下效果不佳，因为缺乏足够的光照，从而限制了水生植物的生长。本研究的目的是评估在为植物提供额外照明的情况下，使用 LED（发光二极管），在两种不同的实验条件下，废水生物化合物浓度的减少情况：通气和补充二氧化碳。分析表明，在补充 CO 的废水中，净化效果更高，人工照明对减少氮形态浓度没有显著影响。在通气的废水中，在人工照明的水箱中观察到更高的氮去除效率。在这两种情况下，通气或 CO 补充以及人工照明或缺乏人工照明，对总磷和磷酸盐的去除均没有影响。
