This paper presents an advanced characterization of the organic fraction of the top deposit layer collected in a French vertical flow treatment wetland (first stage) in operation in Brazil (two units with different organic deposit layer accumulation times), and compares the results with those obtained from studies in France. The organic and inorganic constituents of the samples collected were analysed by biological, chemical and thermochemical methods. The unit with the organic deposit with longer accumulation time (almost 10 years) was characterized as a mature one (organic matter - OM: 51.3 and 52.7%, thermal index - R_TGA: 0.79 and 0.85, humification index - HI: 0.61 and 1.16, respectively for the depths of 0–5 cm and 5–10 cm). The unit with the deposit organic with less than three years of accumulation also presented characteristics of a mature deposit (OM: 61.2%, R_TGA: 0.79, HI: 1.01 for the depth of 0–5 cm), indicating a rapid mineralization of the deposit under the existing subtropical environment. Despite several differences in term of conception, hydraulic and mass loading rates and accumulation rates, the characteristics of the OM of Brazilian deposits were found to be quite similar to the French ones.

本文介绍了在巴西运行的法国垂直流处理湿地（第一阶段）（两个单元具有不同的有机沉积层积累时间）中收集的顶部沉积层有机部分的高级表征，并将结果与​​获得的结果进行了比较。来自法国的研究。通过生物学，化学和热化学方法分析了所收集样品的有机和无机成分。具有较长沉积时间（近10年）的有机沉积物的单元被表征为成熟单元（有机物-OM：51.3和52.7％，热指数-R _TGA：0.79和0.85，增湿指数-HI：0-5厘米和5-10厘米的深度分别为0.61和1.16）。有机沉积物少于三年的单元也表现出成熟沉积物的特征（0-5 cm深度处的OM：61.2％，R _TGA：0.79，HI：1.01），表明该矿床快速矿化。在现有的亚热带环境下沉积。尽管在概念，水力和质量装载率以及堆积率方面存在一些差异，但发现巴西矿床的OM特征与法国矿床非常相似。