Harvested rainwater quality: the importance of appropriate design.
Harvested rainwater quality: the importance of appropriate design.
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收集的雨水质量：适当设计的重要性。
DOI：
10.2166/wst.2010.102
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
David Butler
中科院分区：
文献类型：
--
作者：
Sarah Ward;F. Memon;David Butler
本文总结了水的理化和微生物质量的雨水收集（RWH）系统在英国的办公楼。在8个月期间分析了7个微生物学和34个理化参数。从物理化学角度看，收集的雨水质量几乎不构成健康风险;大多数参数显示浓度低于广泛使用的饮用水指导水平。然而，RWH系统部件（例如配件和落水管）似乎受到软水腐蚀的影响，导致某些金属（铜、锌和铝）浓度较高。这表明应考虑此类配件的材料选择，同时考虑区域雨水的硬度。微生物学方面，分析的样品中不存在隐孢子虫、沙门氏菌和军团菌。然而，粪大肠菌群计数高，在研究开始时，但随着时间的推移，在弱相关性增加pH值。粪肠球菌显示计数始终高于英国雨水收集标准。不适当的屋顶和雨水良好的设计，以及材料的选择似乎是负责减少微生物质量，因为它们促进了鸟类来源的贡献，并抑制清洁活动。建筑物和RWH系统设计需要更多地考虑当地因素，这对于优化收集的雨水质量至关重要，以防止污染沉积物的发展和健康影响。
This paper summarises the physicochemical and microbiological quality of water from a rainwater harvesting (RWH) system in a UK-based office building. 7 microbiological and 34 physicochemical parameters were analysed during an 8 month period. Physicochemically, harvested rainwater quality posed little health risk; most parameters showed concentrations below widely used guideline levels for drinking water. However, RWH system components (e.g. fittings and down pipes) appear to be affected soft water corrosion, resulting in high concentrations of some metals (copper, zinc and aluminium). This suggests the material selection of such fittings should be considered keeping in view the hardness of rainwater of an area. Microbiologically, Cryptosporidium, Salmonella and Legionella were not present in the samples analysed. However, faecal coliform counts were high at the beginning of the study, but did decrease over time in weak correlation with increasing pH. Enterococcus faecalis displayed counts consistently above UK rainwater harvesting standards. Inappropriate roof and rainwater good design, as well as material selection appear to be responsible for the reduced microbial quality, as they promoted contributions from avian sources and inhibited cleaning activities. Building and RWH system designs require greater consideration of local factors, which are critical for optimising harvested rainwater quality, to prevent both the development of contaminated sediments and health impacts.