This study's purpose is to confirm the feasibility and performance of the combination between ‘electro-Fenton’ process and the ‘activated sludge’ biological process, in order to remove the organic matter contained in ‘intermediate’ leachates from technical landfill centre of Hamici (Algiers). This leachate was initially electrochemically pre-treated until the ratio of BOD₅/chemical oxygen deman (COD) = 0.41, then an optimization of the parameters significantly influencing the biological degradation was carried. The results obtained after 13 h of biological treatment show the removal of 97% of the initial COD, with a mixed liquor composed of 700 mL of pre-treated leachate and 300 mL of activated sludge, a dissolved oxygen concentration of 3.5 mg O₂/L and a pH of 7, which allows the effluent to discharge directly into the environment. The conclusions of this work are promising because it was demonstrated that if the operating parameters are well controlled concerning these treatments, its sequence and the referred pre-treatment, the treatment efficiency is very high to the point of direct discharge of the leachate. However, in future studies, the combination of the both processes should be more explored in order to reduce the treatment time and to scale-up the process.

中文翻译：

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电芬顿法预处理生活垃圾渗滤液的生物降解

本研究的目的是确认“电芬顿”工艺与“活性污泥”生物工艺相结合的可行性和性能，以去除哈米奇（阿尔及尔）技术垃圾填埋中心“中间”渗滤液中含有的有机物。 ）。该渗滤液首先进行电化学预处理，直至BOD ₅ /化学需氧量(COD) 的比率= 0.41，然后对显着影响生物降解的参数进行优化。生物处理13 h后的结果表明，700 mL预处理渗滤液和300 mL活性污泥组成的混合液，初始COD去除率达到97%，溶解氧浓度为3.5 mg O ₂ / L 和 pH 值为 7，允许废水直接排放到环境中。这项工作的结论是有希望的，因为它证明，如果这些处理、其顺序和所涉及的预处理的操作参数得到很好的控制，处理效率非常高，甚至可以直接排放渗滤液。然而，在未来的研究中，应该更多地探索这两个过程的结合，以减少处理时间并扩大过程规模。