共查询到19条相似文献,搜索用时 109 毫秒
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屋面雨水收集利用系统主要有两种:常规和绿色屋面雨水收集利用系统。基于常规屋面雨水收集利用系统的工作原理,阐述了屋面雨水的收集、处理和回用方法,提出了虹吸雨水系统应用于屋面雨水收集利用系统所具有的特点、难点及对策。基于绿色屋面收集利用系统的结构及工作原理,阐述了绿色屋面作为雨水处理环节的预处理单元所具有的削减洪峰流量和净化水质的潜能,并结合绿色屋面的功能和局限性,提出绿色屋面的价值应综合其生态、能源、美学、商业效益来考量。归纳了常规和绿色屋面雨水收集利用系统在结构、屋面雨水处理效果、应用方面的特性,对比了二者各自的优势与不足。 相似文献
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典型屋面路面雨水污染状况调查与回收利用试验 总被引:2,自引:0,他引:2
对屋面雨水水质进行分析是回收利用屋面雨水的前提。该文选择西安市典型屋面雨水为研究对象,分析研究区域范围内屋面雨水前后水质变化规律。结果表明西安市雁塔区房屋雨水中主要污染物为COD、SS、TN、TP,水质状况未达到地表水水环境质量Ⅳ类标准和景观娱乐用水水质C类。采集的初期雨水在放置24 h后,污染物COD、SS、TN、TP显著减少。未落地雨水减少量最小,路面雨水减少量最大,原因是路面雨水中的颗粒物、杂质附着沉淀使得指标下降。不同采样时间段内的雨水污染物,以及污染物含量有差异,未落地雨水在整个采样时间段内各项指标稳定,变化较小;屋面雨水在前20 min内COD、SS、TN、TP下降最快,后期减缓;路面雨水前40 min内COD、SS、TN、TP下降较快。另外未落地雨水可直接用于回收利用,但回收难度大,屋面雨水和路面雨水污染比较严重,集中收集处理后可利用。 相似文献
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介绍了屋面雨水收集回用系统的各部分构成要素及其特点,并详细地分析了屋面雨水收集系统的计算方法和屋面雨水回用系统设计过程中应注意的要点,对建筑屋面雨水收集回用系统的设计具有一定的指导意义。 相似文献
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屋面雨水排水系统因专业交叉多、知识点较为零散,故设计中经常会出现设计不合理的情况。因而,设计中应根据建筑的类型、等级,合理选择雨水系统;要掌握雨水的流态,了解管道的压力变化;根据建筑的特点计算汇水面积;屋面溢流口的高度应考虑结构荷载、屋面坡度和排水的流态;应重视复核天沟尺寸。 相似文献
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文章通过对屋面雨水特点、屋面雨水的收集方式、方案及流程进行介绍和分析,结合集水面积的计算方式提出了储水设施的体积计算方法,并根据屋面雨水收集系统的实际特点,对其系统在绿色建筑的应用及推广提出了建议。 相似文献
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通过研究优化雨水渗透设施的填料配比,探究其对屋面雨水径流量以及径流污染的控制效果。结果表明,当雨水渗透设施采用30%粗砂+60%中粗砂+10%细砂作为主填料,搭配30%炼钢炉渣+70%沸石的副填料时,降雨强度取重现期为2 a时,其削减径流峰值和延后洪峰时间的效果可分别达到15%和220 s;优化设计后的雨水渗透设施对CODCr和TN的去除效果分别为30%~40%和20%~25%,对TP、氨氮和SS的去除效果较好,分别可达85%~95%、90%~95%和85%~95%。 相似文献
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在水的综合利用中,由于使用目的不同而对水质条件的要求也不同。正确的水质分析以及水质检测结果的质量控制及保证,是保证水综合利用的头等重要的问题。尤其现在水质污染严重、成分复杂情况下,确保水质检测的准确性及稳定性,就对水质检测结果的质量控制和保证提出了更高的要求。就水质检测结果的质量控制与保证进行探讨。 相似文献
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In recent years, drinking water quality has become a major subject for public and political debate, with the issue of pesticides in drinking water receiving much attention. The EC Drinking Water Directive included a limit of 0.1?µg/1 for individual pesticides, a standard far more stringent than health-based minimum levels set by such bodies as the World Health Organizations and the US EPA. With traditional treatment processes such as chemical coagulation, flocculation, filtration and slow sand filtration unable to meet the stricter pesticide standard, an additional method of treatment was required. Consequently, ozone and granular activated carbon (GAC) have been installed at all the major water treatment works (WTWs) in London and Oxford treating river Thames water. Groundwater WTWs, deemed to be at risk from pesticides, have GAC filters only. Computational Fluid Dynamics (CFD) was investigated as a tool for optimizing the design of ozone contractors. The aim was to distribute ozone flow uniformly so that maximum contact would be made between the water and gas. However, the application of ozone in water treatment processes remains expensive when compared to conventional treatment. Consequently, a cost benefit analysis of continuous versus intermittent ozone operation was carried out. Operational data was obtained and compared for two Thames Water UK and Ireland (TWUKI) surface water treatment works (one conventional (chemical) works and the second based on biological processes). 相似文献
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More than 20 years have passed since the introduction of advanced water treatment with ozonation and granular activated carbon in the Hanshin Water Supply Authority. Significant improvements have been achieved in eliminating taste and odor compounds in water and in suppressing the formation of disinfection by-products. Regarding the bromate ion, we have managed to suppress its formation by keeping the residual ozone concentration and pH low. 相似文献