Aix-Marseille Université - CNRS, FR ECCOREV, Laboratoire Chimie de l'Environnement (FRE3416), Equipe Développements Métrologiques et Chimie des Milieux, 3 place Victor Hugo, case 29, 13331 Marseille Cedex 3, France.
Sci Total Environ. 2012 Jun 1;426:304-10. doi: 10.1016/j.scitotenv.2012.03.043. Epub 2012 Apr 18.
Wastewater reuse for irrigation is an interesting alternative for many Mediterranean countries suffering from water shortages. The development of new technologies for water recycling is a priority for these countries. In this study we test the efficiency of UV-LEDs (Ultraviolet-Light-Emitting Diodes) emitting UV-A or UV-C radiations, used alone or coupled, on bacterial and chemical indicators. We monitored the survival of fecal bioindicators found in urban wastewaters and the oxidation of creatinine and phenol which represent either conventional organic matter or the aromatic part of pollution respectively. It appears that coupling UV-A/UV-C i) achieves microbial reduction in wastewater more efficiently than when a UV-LED is used alone, and ii) oxidizes up to 37% of creatinine and phenol, a result comparable to that commonly obtained with photoreactants such as TiO(2).
废水再利用进行灌溉是许多遭受水资源短缺的地中海国家的一个有趣选择。开发用于水再循环的新技术是这些国家的优先事项。在这项研究中，我们测试了单独或组合使用的 UV-LED（紫外线发光二极管）发出的 UV-A 或 UV-C 辐射对细菌和化学指示剂的效率。我们监测了在城市废水中发现的粪便生物指示剂的存活情况，以及代表常规有机物或污染芳香部分的肌酸和苯酚的氧化情况。结果表明，与单独使用 UV-LED 相比，UV-A/UV-C 组合：i）更有效地实现废水中微生物的减少，ii）可氧化高达 37%的肌酸和苯酚，这一结果与 TiO(2)等光反应剂通常获得的结果相当。
