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首页> 外文期刊>Journal of water resource and protection >Low-Cost Stormwater Filtration System to Improve Urban Water Quality: The Case of Addis Ababa, Ethiopia
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Low-Cost Stormwater Filtration System to Improve Urban Water Quality: The Case of Addis Ababa, Ethiopia

机译：低成本雨水过滤系统，提高城市水质：埃塞俄比亚亚的斯亚贝巴的情况

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摘要

Urbanization in developing countries often negatively impacts water resources by polluting surface waters. Addis Ababa, Ethiopia, is currently experiencing rapid urbanization accompanied by significant water shortages, un-managed stormwater, and increasing river water pollution. To supplement the need for non-potable water and address stormwater runoff pollution, we constructed a low cost stormwater filtration system. The filtration system is comprised of a sedimentation area followed by three gravel grain sizes arranged horizontally from coarse to medium to fine filter media. We compared the quality of pretreatment water with post-treatment water by measuring physi-cochemical parameters, heavy metals and nutrients. We found that the filtration system reduced turbidity by 87%, TSS by 80%, Cu by 87% and Zn by 90%. Further, it positively increased the concentration of DO by 42%. However, the filtration system did not remove nitrates and nitrites. Implementing this system at outfalls in the rapidly expanding condominium housing areas can increase residents' supply of non-potable water and reduce the amount of polluted stormwater entering nearby streams and rivers.
机译：发展中国家的城市化常常通过污染表面水对水资源产生负面影响。埃塞俄比亚亚的斯亚贝巴目前正在经历快速的城市化，伴随着显着的水资源短缺，未管理的雨水和增加河水污染。为了补充对不饮用水和地址雨水径流污染的需求，我们构建了一种低成本的雨水过滤系统。过滤系统由沉降区域组成，然后是三个砾石颗粒尺寸从粗到培养基水平排列到细过滤介质。通过测量物理化工学参数，重金属和营养素，将预处理水的质量与后处理后水进行比较。我们发现，过滤系统将浊度降低87％，TSS的80％，Cu以87％和Zn达90％。此外，它呈浓度增加了42％。然而，过滤系统未去除硝酸盐和亚硝酸盐。在快速扩张的公寓住房区域实施该系统，在迅速扩张的公寓住房区域可以增加居民供应的非饮用水，并减少进入附近溪流和河流的污染雨水的数量。

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