准好氧填埋结构ch4含量分布变化研究

依据准好氧填埋原理构建了填埋试验装置,对甲烷、氧气在准好氧填埋体中不同层次的体积分数进行了监测。结果表明:垃圾填埋体下层φ(ch₄)为33 1%,φ(O₂)为1 1%;中层φ(ch₄)为15 0%,φ(O₂)为4 2%;上层φ(ch₄)为3 1%,φ(O₂)为12 2%。而厌氧填埋结构的φ(ch₄):下层为31 5%,中层为32 6%,上层为22 0%。在准好氧填埋结构条件下,φ(ch₄)的分布具有下层>中层>上层的层次特性;φ(O₂)呈上层>中层>下层的规律性。在准好氧填埋、厌氧填埋体中,φ(ch₄)的平均值分别为17 0%和29 0%。 

Study on Distribution of Methane Content in Semi-Aerobic Landfilling Structure

Large-scale experimental installation was established according to the semi-aerobic landfilling theory, and the volume fraction of methane, as well as that of oxygen, in different layers in this semi-aerobic landfill was monitored. The results showed that the CH_4 and O_2 volume fractions in the landfill underlayer were (33.1%) and (1.1%,) respectively; the fractions in the landfill middlelayer were (15.0%) and (4.2%,) respectively; the fractions in the landfill upperlayer were (3.1%) and (12.2%,) respectively. Compared with this, in the anaerobic landfilling structure, the volume fraction of CH_4 in underlayer, middlelayer and upperlayer was respectively (31.5%,)( 32.6%) and (22.0%.) In semi-aerobic landfilling structure, CH_4 volume fraction declined according to the sequence of underlayer, middlelayer and upperlayer, whereas the O_2 fraction declined according to the sequence of upperlayer, middlelayer and underlayer. The average methane volume fractions in semi-aerobic landfill treatment and anaerobic landfilling treatment were 17.0% and 29.0%, respectively.