典型集雨蓄水设施(水柜)形式下水质试验研究

Research on Rainwater Harvesting Water Quality in Different Water Tanks

采用在野外现场选定4种典型集雨蓄水设施(水柜)形式下,通过定点定时采集水样并在实验室对其20多项水质指标进行化验分析的方法,对集雨水质及其季节变化开展了试验研究。结果显示,集雨水质最容易超标的指标是浑浊度、耗氧量(CODMn)、菌落总数、总大肠菌群、耐热大肠菌群以及肉眼可见物。表明集雨集流水质容易受到微生物污染和有机污染,水柜形式、是否加盖以及不同季节对水质都有较大影响,未经处理的水柜水质一般达不到饮用水标准要求,需要采取适当的净化处理与消毒措施,保障饮水安全。

This paper presents the results of water quality in different water tanks of rainwater harvesting for rural water supply and their seasonal changes through water sampling in field in different seasons and testing on more than 20 water quality indicators in the lab.The results show that the water quality indicators that most likely exceed the standard limits are turbidity,CODMn,total bacterial count,total coliforms,thermotolerant coliforms and visible matter.This indicates that rainwater harvesting water quality is susceptible to microbial contamination and organic pollution,that water tank forms and with or without cover and seasons has a great impact on the water quality stored,and that the untreated rainwater collected in the tanks can not reach drinking water standards requirements and thus there is a need to take appropriate purification and disinfection measures to ensure the safety of drinking water.