In the present study, the use of heterogeneous photocatalysis TiO2/UV coupled to an activated sludge reactor was evaluated as an alternative treatment for the leachate coming from a Landfill, located in Cucuta (Colombia). TiO₂ (Degussa P-25) between 100 and 600 mg.L⁻¹ was used as a catalyst, semi-continuous type reactors for the photocatalysis, a batch for the biological stage, UV light with accumulated energies from 20 to 60 kJ.L⁻¹ were also used, a constant concentration of H₂O₂ was used as an adjuvant in all tests. The research consisted of four main phases: leachate characterization, biological treatment, optimization of photocatalytic and AOP-biological coupling. For the optimization of the photocatalytic step, an experimental design was carried out through the statistical program Statgraphics Centurion XV of factorial type 3^2 (3 levels 2 variables), modeling the results by means of a response surface, the variables of the pH and the concentration of the catalyst were included, having this as input for the response of interest the percentage (%) of DOC removal. The biological process itself provided a removal of 38 and 24% for COD and DOC, respectively. The AOP-biological coupling provided a removal of 68 and 76% in terms of COD and DOC, respectively. Thus, the coupling significantly improves the overall efficiency of the process by more than 50%, which represents a promising improvement compared to the removal of organic matter for the treatment of the same type of water using only the biological process. The results show a viable alternative for the treatment of leachate because higher removal levels are achieved in residence times, which are considered shorter than the ones in conventional processes.

在本研究中，评估了将异质光催化TiO2 / UV与活性污泥反应器耦合使用作为来自位于Cucuta（哥伦比亚）的垃圾填埋场渗滤液的替代处理方法。使用介于100和600 mg.L ^-1之间的TiO ₂（Degussa P-25）作为催化剂，用于光催化的半连续型反应器，用于生物阶段的一批，具有20至60 kJ累积能量的UV光。还使用L ^-1，恒定浓度的H ₂ O ₂在所有测试中均被用作佐剂。该研究包括四个主要阶段：浸出液表征，生物处理，光催化优化和AOP生物耦合。为了优化光催化步骤，通过统计程序Statgraphics Centurion XV（阶乘类型3 ^ 2（3个2级变量））进行了实验设计，并通过响应面，pH和pH变量对结果进行了建模。包括催化剂的浓度，将其作为感兴趣的响应的DOC去除百分比（％）的输入。生物过程本身对COD和DOC的去除分别为38％和24％。AOP-生物偶联分别去除了COD和DOC的68％和76％。从而，偶联显着提高了该过程的整体效率超过50％，与仅使用生物过程处理同一类型水的有机物去除相比，这是一个有希望的改进。结果显示出一种用于处理渗滤液的可行替代方案，因为在停留时间上可获得更高的去除水平，这被认为比常规工艺中的去除时间更短。