Ducom Gaëlle, Radu-Tirnoveanu Daniela, Pascual Christophe, Benadda Belkacem, Germain Patrick
Université de Lyon, INSA-Lyon, Laboratoire de Génie Civil et d'Ingénierie Environnementale LGCIE, 20 avenue Albert Einstein, F-69621 Villeurbanne, France.
J Hazard Mater. 2009 Jul 30;166(2-3):1102-8. doi: 10.1016/j.jhazmat.2008.12.024. Epub 2008 Dec 7.
This study focuses on a new way of reusing municipal solid waste incinerator bottom ash: landfill gas purification before energetic valorisation. A pilot plant was designed and operated on a landfill site located in France (Loire). One kilogram bottom ash is able to sequestrate more than 3.0 g of hydrogen sulphide, 44 mg of methyl mercaptan, and 86 mg of dimethyl sulphide. Hydrogen sulphide retention is probably due to acid-basic reactions conducting to sulphur mineralisation under the form of low solubility metal sulphides. The reaction medium is hydration water. The retention mechanism for methyl mercaptan is probably similar but dimethyl sulphide is most likely retained by physical adsorption. As methane is not retained by bottom ash, the landfill gas energetic content will not be lowered. There seems to be no appreciable difference in these results whether bottom ash is fresh or carbonated. These results are encouraging in the perspective of a field scale application of this biogas treatment process.
在能源回收之前对填埋气进行净化。在法国（卢瓦尔省）的一个垃圾填埋场设计并运行了一个中试装置。一千克底灰能够封存超过3.0克硫化氢、44毫克甲硫醇和86毫克二甲基硫醚。硫化氢的封存可能是由于酸碱反应导致硫以低溶解度金属硫化物的形式矿化。反应介质是水化水。甲硫醇的封存机制可能类似，但二甲基硫醚很可能是通过物理吸附被封存。由于甲烷不会被底灰封存，填埋气的能量含量不会降低。无论底灰是新鲜的还是碳酸化的，这些结果似乎没有明显差异。从该沼气处理工艺的现场规模应用角度来看，这些结果令人鼓舞。
