【摘要】 屋面雨水是一种可供回收利用的水资源,探究了屋面雨水水质及屋面材料、雨前干期和空气质量对水质的影响。结果表明,雨水中的污染物主要来自下垫面,以油毡屋面污染最重,雨前干期时间越长,屋面雨水水质越差。利用雨水花园对屋面雨水进行收集和预处理后储存在水箱中,储存在水箱中的各项指标因为沉降作用和微生物作用存在竖向差异,污染物浓度会逐渐下降,微生物数量会逐渐增加;降雨会带来储存水箱中浊度、TN、TP和耗氧量的升高,菌落总数由于稀释作用反而下降。储存在水箱中的雨水经过超滤膜过滤后,检测的几项指标可达到分散式生活饮用水卫生标准。更多还原

【Abstract】 Roof rainwater was a water resource that could be reclaimed for use.In this study,influence of roof materials,rain free period and air quality on roof rainwater quality were explored.The results showed that pollutants in rainwater were mainly from the underlying surface.The most polluted rain water was from linoleum roof,and the longer the rain free period,the worse the roof rainwater quality.Roof rainwater was collected and pretreated by a rainwater garden and then stored in a water tank.Quality of water stored in the tank exhibited vertical differences due to sedimentation and microbial action.Concentration of pollutants decreased and microorganisms increased over time.Rainfall increased the turbidity,TN,TP and oxygen consumption of water in the tank,and the total number of colonies decreased due to dilution.Several quality indexes of the water stored in the tank were tested and could meet the hygienic standard of decentralized drinking water after filtered by the ultrafiltration membrane.更多还原