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首页> 美国卫生研究院文献>Springer Open Choice >Solar disinfection: an approach for low-cost household water treatment technology in Southwestern Ethiopia
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Solar disinfection: an approach for low-cost household water treatment technology in Southwestern Ethiopia

机译：太阳能消毒：埃塞俄比亚西南部低成本家庭水处理技术的一种方法

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Disinfection of contaminated water using solar radiation (SODIS) is known to inactivate bacteria. Its inactivation efficiency depends on local conditions where the disinfection is made. This study was aiming to test the efficiency of solar disinfection using different water parameters as low-cost household water treatment technology. Inactivation of microbes was tested using fecal coliform as test organism. The SODIS experiment was carried out at turbidity 2NTU, pH 7, and various water temperature (38.1°C, 41.8°C, 45.6°Cand 51.1°C) and solar intensities, using clear and black plastic bottles filled to different depths. The results show that the rate of microbial inactivation in relation to depth of water, turbidity, container type, intensity of light and color of container was statistically significant (p < 0.05). However, bottle placement, exposure and water pH were unrelated to microbial inactivation. Bacterial re-growth was not observed after solar disinfection. By adjusting the parameters, complete and irreversible fecal coliform inactivation was achieved within an exposure time of less than four hours in the areas where the solar irradiance is about 3.99 kW/m2 and above. Our results indicate that application of SODIS could play a significant role in the provision of safe water in rural communities of developing countries where there is ample sunshine, specifically in sub-Saharan African countries.
机译：已知使用太阳辐射（SODIS）对污水进行消毒可以使细菌失活。它的灭活效率取决于进行消毒的当地条件。这项研究旨在测试使用不同水参数作为低成本家用水处理技术的太阳能消毒效率。使用粪大肠菌群作为测试生物来测试微生物的灭活。 SODIS实验在浊度2NTU，pH 7，各种水温（38.1°C，41.8°C，45.6°C和51.1°C）和太阳强度下进行，使用透明和黑色塑料瓶填充不同的深度。结果表明，微生物灭活率与水深，浊度，容器类型，光强度和容器颜色有关，具有统计学意义（p <0.05）。但是，瓶子的放置，暴露和水的pH值与微生物灭活无关。日光消毒后未观察到细菌再生长。通过调整参数，在太阳辐照度约为3.99 kW / m 2 或更高的区域中，在不到四小时的暴露时间内即可实现完全，不可逆的粪便大肠菌灭活。我们的结果表明，SODIS的应用在阳光充足的发展中国家农村社区，特别是在撒哈拉以南非洲国家的农村社区，在提供安全水方面可以发挥重要作用。

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