Urine treatment by solar disinfection for agriculture reuse purpose in a poor rural context: case of Burkina Faso
Urine treatment by solar disinfection for agriculture reuse purpose in a poor rural context: case of Burkina Faso
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在贫困农村地区通过太阳能消毒进行尿液处理以实现农业再利用：布基纳法索的案例
DOI：
10.2166/washdev.2020.075
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Patricia V. Tagro
中科院分区：
文献类型：
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作者：
D. Sangaré;A. Brou;M. Sou;Dakoure;Patricia V. Tagro
该研究旨在减少尿液处理的储存时间，并评估太阳能消毒（SODIS）方法后处理过的尿液的质量。在每次日光暴露之前，在上午10点至下午4点之间，以1小时的频率对尿样进行微生物分析，在此期间在PET瓶（1.5 L）中测量温度。大肠杆菌（Escherichia coli，E.大肠杆菌）和沙门氏菌分别为10和10 CFU/100 mL。温度和紫外线的联合作用提高了大肠杆菌的灭活效率。大肠杆菌中的浓度为5 log单位。另一方面，98%的沙门氏菌在PET瓶中的温度在50和65 ℃之间变化的12 am和3 pm之间连续暴露于不到3小时内被灭活。k值表明，当温度高于50 ℃时，沙门氏菌的灭活速度加快。结果表明，一阶指数衰减模型是预测SODIS对尿液中沙门氏菌灭活效果的最佳方法。一般结果表明，经过3天的阳光照射，通过生态厕所收集的尿液经过细菌消毒，因此可以用于农业。
The study aimed to reduce the storage time of urine treatment and assess the quality of treated urine following the Solar DISinfection (SODIS) method. Microbiological analyses were performed on urine samples taken before each sunlight exposure, between 10am and 4pm at a frequency of 1 h, during which temperature was measured in PET bottles (1.5 L). The initial concentrations of Escherichia coli (E. coli) and Salmonella in unstored urine were 10 and 10 CFU/100 mL respectively. The combined effect of temperature and UV radiation increased inactivation efficiency of E. coli at 5 log units. On the other hand, 98% of Salmonellawere inactivated in less than 3 h of continuous exposure between 12am and 3pm with temperature varying between 50 and 65 C in PET bottles. The k values showed that the inactivation rate of Salmonella tested was accelerated when the temperature was above 50 C. Then, the results indicated that the first-order exponential decay model was the best method to predict the inactivation of Salmonella in urine by SODIS. General results showed that after 3 days of exposure to sunlight, urine collected via eco-toilet becomes bacteriologically sanitized and therefore can be used in agriculture.