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流生物膜中的保留 - - 对自洁能力的潜在贡献
Thomas Löffler1, Eric Bollinger2, Alexander Feckler1
1Eußerthal Ecosystem Research Station, RPTU Kaiserslautern-Landau, Birkenthalstraße 13, D-76857, Eußerthal, Germany; iES Landau, Institute for Environmental Sciences, RPTU Kaiserslautern-Landau, Fortstraße 7, D-76829, Landau, Germany.
Journal of environmental management
|August 19, 2023
概括
河流中的生物薄膜有助于保留废水处理厂 (WWTP) 的 (N),有助于河流的自我清洁. 然而,它们的容量受到过度N负载和环境因素的限制,影响下游水质.
科学领域:
- 环境科学 环境科学
- 生态生态学 生态生态学
- 生物地质化学生物地质化学
背景情况:
- 地表水面临着来自人类活动的日益增长的压力,特别是废水处理厂 (WWTP) 的营养物质排放.
- 了解溪流的自我清洁能力对于管理水质至关重要.
- 生物膜在水生生态系统中的营养循环中发挥着重要作用.
研究的目的:
- 评估生物薄膜对从流中WWTP中保持 (N) 的贡献.
- 为了评估二次流的自我清洁能力,使用N保留作为代理.
- 研究基质类型 (无机与有机) 对生物膜N吸收的影响.
主要方法:
- 无机和有机基质在WWTP上游和下游的流中部署五周.
- 在生物膜中测量同位素比率 (δ15N),以追踪人为N来源.
- 分析 δ15N,废水贡献和与WWTP废水的距离之间的关系.
主要成果:
- 生物膜显示WWTP下游的δ15N增加,表明废水衍生N的吸收.
- 观察到δ15N与河流排放中的废水比例之间存在显著的正线性关系.
- 生物膜N的保留能力被发现受到过度N负载的限制,并受到土地使用和气候因素的影响.
结论:
- 生物膜有助于保持营养和溪流的自我清洁能力.
- 生物膜的处理能力有限,特别是在高营养负载和不同的环境条件下.
- 生物膜可能只能部分减轻WWTP的影响,而大量的N负载可能会被下游运输.
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