| Title | Landfill leachate treatment: Comparison of standalone electrochemical degradation and combined with a novel biofilter |
| Abstract | Raw leachate and a biological effluent coming from the same raw leachate that has been biologically treated in a new type of biological reactor, were electrochemically treated. A batch-type electrolytic cell using two patented DSA (R) electrodes was employed. Raw leachate, treated for 240 min at a current density of 200 mA/cm(2), falls within the sewer discharge limits set by Italian legislation for the COD. Instead, effluent obtained through combined biological and electro-oxidation treatment (by using 83 mA/cm(2) and 133 mA/cm(2)) has a COD such that could be discharged into the sewer and, after applying a current density equal to 200 mA/cm(2) after 249 min, has a COD value such that can even discharged into receiving water bodies. The electrochemical oxidation carried out is only effective on nitrogen ammonia through indirect electro-oxidation; it is not effective on other nitrogen-containing species. In any case, where ammonia is present (i.e., in the raw leachate), 82% is removed by the end of the test (i.e., after 240 min of electrolysis) at 200 mA/cm(2). Also, for the raw leachate, chloramine formation is most marked at low current densities. Nevertheless, the toxicity does not appear to be affected; in fact, decrease regardless of the applied current density. (C) 2015 Elsevier B.V. All rights reserved. |
| Source | Chemical engineering journal ( Print) 288, pp. 87–98 |
| Keywords | Landfill leachateElectro-oxidationAOXToxicity evaluationResidual chlorine |
| Journal | Chemical engineering journal ( Print) |
| Editor | Elsevier Sequoia, Lausanne, Svizzera |
| Year | 2016 |
| Type | Articolo in rivista |
| DOI | 10.1016/j.cej.2015.11.069 |
| Authors | Del Moro, G.; Prieto-Rodriguez, L.; De Sanctis, M.; Di Iaconi, C.; Malato, S.; Mascolo, G. |
| Text | 437582 2016 10.1016/j.cej.2015.11.069 ISI Web of Science WOS 000370085900010 Landfill leachate Electro oxidation AOX Toxicity evaluation Residual chlorine Landfill leachate treatment Comparison of standalone electrochemical degradation and combined with a novel biofilter Del Moro, G.; Prieto Rodriguez, L.; De Sanctis, M.; Di Iaconi, C.; Malato, S.; Mascolo, G. CNR; CIEMAT Raw leachate and a biological effluent coming from the same raw leachate that has been biologically treated in a new type of biological reactor, were electrochemically treated. A batch type electrolytic cell using two patented DSA R electrodes was employed. Raw leachate, treated for 240 min at a current density of 200 mA/cm 2 , falls within the sewer discharge limits set by Italian legislation for the COD. Instead, effluent obtained through combined biological and electro oxidation treatment by using 83 mA/cm 2 and 133 mA/cm 2 has a COD such that could be discharged into the sewer and, after applying a current density equal to 200 mA/cm 2 after 249 min, has a COD value such that can even discharged into receiving water bodies. The electrochemical oxidation carried out is only effective on nitrogen ammonia through indirect electro oxidation; it is not effective on other nitrogen containing species. In any case, where ammonia is present i.e., in the raw leachate , 82% is removed by the end of the test i.e., after 240 min of electrolysis at 200 mA/cm 2 . Also, for the raw leachate, chloramine formation is most marked at low current densities. Nevertheless, the toxicity does not appear to be affected; in fact, decrease regardless of the applied current density. C 2015 Elsevier B.V. All rights reserved. 288 Published version Articolo in rivista Elsevier Sequoia 1385 8947 Chemical engineering journal Print Chemical engineering journal Print Chem. eng. j. Print Chemical engineering journal. Print claudio.diiaconi DI IACONI CLAUDIO marco.desanctis DE SANCTIS MARCO giuseppe.mascolo MASCOLO GIUSEPPE |
