Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Qingdao 266237, China.
College of Life and Environmental Sciences, Minzu University of China, Beijing 100081, China.
Bioresour Technol. 2019 Dec;293:122086. doi: 10.1016/j.biortech.2019.122086. Epub 2019 Aug 29.
Constructed wetland (CW) for wastewater treatment has attracted increasing attention. In this review, the system configuration optimization, purification effect and general mechanisms of nitrogen removal in CW are systematically summarized and discussed. Ammonia oxidation is a crucial and primary process for total nitrogen (TN) removal in domestic or livestock wastewater treatment. Aeration, waterdrop influent and tidal operation are three main methods to strengthen the oxygen supplement and nitrification process in CW. Aeration significantly increases the ammonia removal rate (almost 100%), followed by the removal of chemical oxygen demand (COD) and TN. Solid carbon source, iron and anode material can be filled as electron donor for the denitrification process. The co-adjustment of oxygen and carbon/electron donor can form different conditions for different nitrogen removal pathways (e.g. the simultaneous nitrification-denitrification, the partial nitrification-denitrification and the anammox process), and achieve the optimal removal of nitrogen.
人工湿地（CW）用于处理废水已引起越来越多的关注。在本文中，系统地总结和讨论了 CW 中的系统配置优化、净化效果和脱氮的一般机制。氨氧化是家庭或牲畜废水中去除总氮（TN）的关键和主要过程。曝气、水滴进水和潮汐操作是 CW 中强化氧气补充和硝化过程的三种主要方法。曝气可显著提高氨去除率（几乎达到 100%），其次是去除 COD 和 TN。固体碳源、铁和阳极材料可作为电子供体填充以进行反硝化过程。氧气和碳/电子供体的共同调节可以为不同的氮去除途径形成不同的条件（例如同步硝化-反硝化、部分硝化-反硝化和厌氧氨氧化过程），并实现最佳的氮去除效果。
