College of Hydraulic Engineering, Tianjin Agricultural University, Tianjin 300384, China.
College of Hydraulic Engineering, Tianjin Agricultural University, Tianjin 300384, China.
Bioresour Technol. 2024 Jun;402:130827. doi: 10.1016/j.biortech.2024.130827. Epub 2024 May 9.
In this study, three distinct bioretention setups incorporating fillers, plants, and earthworms were established to evaluate the operational efficiency under an ecosystem concept across varying time scales. The results revealed that under short-term operating conditions, extending the drying period led to a notable increase in the removal of NO-N, total phosphorus (TP), and chemical oxygen demand (COD) by 5 %-7%, 4 %-12 %, and 5 %-10 %, respectively. Conversely, under long-time operating conditions, the introduction of plants resulted in a significant boost in COD removal by 10 %-20 %, while the inclusion of earthworms improved NH-N and NO-N removal, especially TP removal by 9 %-16 %. Microbial community analysis further indicated the favorable impact of the bioretention system on biological nitrogen and phosphorus metabolism, particularly with the incorporation of plants and earthworms. This study provides a reference for the operational performance of bioretention systems on different time scales.
在这项研究中，建立了三个不同的生物滞留装置，其中包含填料、植物和蚯蚓，以评估在不同时间尺度下的生态系统概念下的运行效率。结果表明，在短期运行条件下，延长干燥期可使 NO-N、总磷（TP）和化学需氧量（COD）的去除率分别提高 5%-7%、4%-12%和 5%-10%。相反，在长时间运行条件下，植物的引入可使 COD 的去除率显著提高 10%-20%，而蚯蚓的引入可提高 NH-N 和 NO-N 的去除率，特别是 TP 的去除率可提高 9%-16%。微生物群落分析进一步表明，生物滞留系统对生物氮磷代谢具有有利影响，特别是植物和蚯蚓的引入。本研究为不同时间尺度下生物滞留系统的运行性能提供了参考。
