利用水位下降来去除建筑处理湿地中的过剩有机物质
Paul Boudreau1, Mark Sees2, Anthony J Mirabito1
1Aquatic Biogeochemistry Laboratory, Department of Biology, University of Central Florida, 4000 Central Florida Blvd., Orlando, FL 32816, United States of America.
The Science of the total environment
|February 2, 2024
概括
建造湿地的临时干燥 (WLDD) 通过促进巩固,而不仅仅是氧化,显著减少有机物积累. 这种管理策略可以减少昂贵的湿地改造,而不会影响营养物质的去除效率.
科学领域:
- 环境工程 环境工程
- 湿地科学 湿地科学
- 水质管理水质管理
背景情况:
- 建筑处理湿地 (CTWs) 对于废水处理后的营养去除至关重要.
- 在CTW中持续的洪水导致有机物 (OM) 积累和无氧条件.
- 累积的OM需要频繁且昂贵的湿地细胞翻新.
研究的目的:
- 评估临时水位下降 (WLDD) 在CTW中巩固和氧化OM的有效性.
- 为了确定WLDD是否影响营养物质去除效率.
- 评估WLDD对CTW管理的长期益处.
主要方法:
- 在奥兰多东部湿地 (佛罗里达州,美国) 进行了一项为期两年的实地实验,使用前后控制冲击设计.
- 用完整的土壤核心进行实验室实验,并接受多种不同的WLDD制度.
- 量化花厚度,土壤高度,以及地表水和土壤中的营养度.
主要成果:
- 实地实验显示,在WLDD之后,花厚度减少了60%,土壤高度下降了2.7厘米,相当于7.5年的花积累.
- 实验室结果表明,WLDD持续时间和CO2C损失之间存在很强的相关性,整合占OM损失的95-96%.
- 流出的表面水 (N) 没有受到WLDD的影响,可溶性反应 (P) 在重新淹没后的36天内恢复到基线水平.
结论:
- 临时WLDD是一种有效的策略,用于管理CTW中的OM积累.
- WLDD可以显著延长湿地电池的运行寿命,降低翻新成本.
- 将WLDD整合到管理实践中,提供了一种可持续的方法来维持CTW性能.
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