The fate of stormwater-associated bacteria in constructed wetland and water pollution control pond systems
The fate of stormwater-associated bacteria in constructed wetland and water pollution control pond systems
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DOI：
10.1046/j.1365-2672.2000.01118.x
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发表时间：
2000-08-01
影响因子：
4
通讯作者：
Bavor, HJ
中科院分区：
文献类型：
--
作者：
Davies, CM;Bavor, HJ
比较了人工湿地和水污染控制塘降低休闲沃茨雨水细菌负荷的能力。耐热大肠菌群，肠球菌和异养菌的浓度进行了测定，在流入和流出的样品收集从每个系统在6个月的时间。水污染控制塘中细菌去除效果明显低于人工湿地。这是由于池塘系统不能保留细菌主要吸附的细粘土颗粒（< 2 μ m）。沉积物微宇宙生存研究表明，耐热大肠菌群的持久性是更大的池塘沉积物比湿地沉积物，捕食是影响细菌生存的主要因素。池塘沉积物中细菌寿命更长的关键似乎是细菌吸附到细颗粒上，从而保护它们免受捕食者的侵害。这些观察结果可能会显着影响有效的雨水管理处理系统的选择。
The performances of a constructed wetland and a water pollution control pond were compared in terms of their abilities to reduce stormwater bacterial loads to recreational waters. Concentrations of thermotolerant coliforms, enterococci and heterotrophic bacteria were determined in inflow and outflow samples collected from each system over a 6-month period. Bacterial removal was significantly less effective in the water pollution control pond than in the constructed wetland. This was attributed to the inability of the pond system to retain the fine clay particles (< 2 mu m) to which the bacteria were predominantly adsorbed. Sediment microcosm survival studies showed that the persistence of thermotolerant coliforms was greater in the pond sediments than in the wetland sediments, and that predation was a major factor influencing bacterial survival. The key to greater bacterial longevity in the pond sediments appeared to be the adsorption of bacteria to fine particles, which protected them from predators. These observations may significantly affect the choice of treatment system for effective stormwater management.