Optimizing the treatment of landfill leachate by conventional Fenton and photo-Fenton processes
Optimizing the treatment of landfill leachate by conventional Fenton and photo-Fenton processes
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DOI：
10.1016/j.scitotenv.2009.02.009
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发表时间：
2009-05-15
影响因子：
9.8
通讯作者：
Huang, Chin Pao
中科院分区：
文献类型：
--
作者：
Hermosilla, Daphne;Cortijo, Manuel;Huang, Chin Pao
垃圾填埋是一种成熟的、经济上有吸引力的技术。是管理都市固体废物的最终方法。然而，垃圾填埋场不可避免地产生渗滤液，需要进一步处理。在现有的各种渗滤液处理技术中，高级氧化工艺（AOPs）是处理难降解有机组分的有效方法之一。而芬顿试剂已经发展成为一种很有前途的处理渗滤液的高级氧化工艺。特别地，已经报道了UV-辐射与芬顿试剂的组合是允许Fe 2 1的光再生和羧酸铁的光脱羧的方法。在这项研究中，芬顿和光芬顿过程进行了微调的处理从Colmenar Viejo（马德里，西班牙）垃圾填埋场的渗滤液。结果表明，它是可能的，以定义一组条件下，相同的COD和TOC去除率（约70%），可以实现与传统和photo-Fenton工艺。但在最佳COD去除条件下，芬顿法会产生大量的铁污泥，需要进一步处理。此外，传统的芬顿工艺能够实现略高于80%的COD去除率从“年轻”的渗滤液，而“老”和“混合”的渗滤液是接近70%。光助芬顿处理垃圾渗滤液的主要优点是，它消耗的铁少32倍，产生的污泥体积少25倍，产生相同的COD去除效果比传统的芬顿处理。(C)2009 Elsevier B. V.保留所有权利。
Landfill, a matured and economically appealing technology. is the ultimate approach for the management of municipal solid wastes. However, the inevitable generation of leachate from landfill requires further treatment. Among the various leachate treatment technologies available, advanced oxidation processes (AOPs) are among powerful methods to deal with the refractory organic constituents. and the Fenton reagent has evolved as one promising AOPs for the treatment of leachates. Particularly, the combination of UV-radiation with Fenton's reagent has been reported to be a method that allows both the photo-regeneration of Fe 2 1 and photo-decarboxylation of ferric carboxylates. In this study, Fenton and photo-Fenton processes were fine tuned for the treatment of leachates from the Colmenar Viejo (Madrid, Spain) Landfill. Results showed that it is possible to define a set of conditions under which the same COD and TOC removals (approximate to 70%) could be achieved with both the conventional and photo-Fenton processes. But Fenton process generated an important quantity of iron sludge, which will require further disposal, when performed under optimal COD removal conditions. Furthermore conventional Fenton process was able to achieve slightly over an 80% COD removal from a "young" leachate, while for "old" and "mixed" leachates was close to a 70%. The main advantage showed by the photo-assisted Fenton treatment of landfill leachate was that it consumed 32 times less iron and produced 25 times less sludge volume yielding the same COD removal results than a conventional Fenton treatment. (C) 2009 Elsevier B.V. All rights reserved.