Mangangka Isri R, Liu An, Egodawatta Prasanna, Goonetilleke Ashantha
Department of Civil Engineering, Faculty of Engineering, Sam Ratulangi University, Manado, Indonesia.
Research Centre of Environmental Engineering and Management, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, People's Republic of China; Cooperative Research and Education Center for Environmental Technology, Kyoto University-Tsinghua University, Shenzhen 518055, People's Republic of China.
J Environ Manage. 2015 Mar 1;150:173-178. doi: 10.1016/j.jenvman.2014.11.007. Epub 2014 Dec 6.
Treatment performance of bioretention basins closely depends on hydrologic and hydraulic factors such as rainfall characteristics and inflow and outflow discharges. An in-depth understanding of the influence of these factors on water quality treatment performance can provide important guidance for effective bioretention basin design. In this paper, hydraulic and hydrologic factors impacting pollutant removal by a bioretention basin were assessed under field conditions. Outcomes of the study confirmed that the antecedent dry period plays an important role in influencing treatment performance. A relatively long antecedent dry period reduces nitrite and ammonium concentrations while increasing the nitrate concentration, which confirms that nitrification occurs within the bioretention basin. Additionally, pollutant leaching influences bioretention basin treatment performance, reducing the nutrients removal efficiency, which was lower for high rainfall events. These outcomes will contribute to a greater understanding of the treatment performance of bioretention basins, assisting in the design, operation and maintenance of these systems.
生物滞留池的处理性能密切取决于水文和水力因素，如降雨特征以及流入和流出流量。深入了解这些因素对水质处理性能的影响可为生物滞留池的有效设计提供重要指导。本文在实地条件下评估了影响生物滞留池污染物去除的水力和水文因素。研究结果证实，前期干旱期对处理性能有重要影响。相对较长的前期干旱期会降低亚硝酸盐和铵的浓度，同时增加硝酸盐浓度，这证实了生物滞留池内发生了硝化作用。此外，污染物淋溶会影响生物滞留池的处理性能，降低养分去除效率，高降雨事件时的去除效率更低。这些结果将有助于更深入地了解生物滞留池的处理性能，协助这些系统的设计、运行和维护。
