低影响开发替换沙子过介质:成本和对污染物清除效率的影响
Felicia Ellis1, Drew W Johnson1, Kristen E Brown1
1School of Civil & Environmental Engineering, and Construction Management, The University of Texas at San Antonio, San Antonio, TX, 78249, USA.
Journal of environmental management
|August 3, 2025
概括
沙过器盆地有效地减轻雨水,但维护,如媒体更换,对悬浮固体的去除影响最小. 然而,它可以破坏生物膜,减少大肠杆菌,和的去除,平均成本约为18,462美元.
科学领域:
- 环境工程 环境工程
- 水资源管理 水资源管理
- 风暴水管理风暴水管理
背景情况:
- 沙过盆地对于德克萨斯州的雨水缓解至关重要,是最佳管理实践 (BMP).
- 有效运行在很大程度上依赖于定期的检查和维护程序.
- 检查了德克萨斯州贝克萨斯县的盆地,位于爱德华兹 Aquifer 充电区上方.
研究的目的:
- 评估沙子过器介质维护对污染物去除效率的影响.
- 分析与砂器维护活动相关的成本变化.
- 从检查记录 (2017-2022) 中识别与维护相关的问题.
主要方法:
- 在沙介维护之前和之后评估污染物去除性能.
- 分析了沙过器和沉积盆地的检查记录.
- 由私营和政府实体取代媒体的经过记录的成本.
主要成果:
- 在悬浮固体清除后顶部介质层更换的最小变化.
- 观察到总大肠杆菌,总和总的去除减少,可能是由于生物膜的破坏.
- 平均媒体更换成本为18,462美元±6325美元,包括移除,更换和处置.
结论:
- 替换沙子过介质对悬浮固体的去除影响有限,但可能对病原体和重金属的去除产生负面影响.
- 维护期间生物膜的破坏 (schmutzdecke) 是影响性能的一个关键因素.
- 媒体更换是维护砂BMP的必要但昂贵的组成部分,以满足监管标准.
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