生物反应器处理煤矿瓦斯气体工艺填料的选择

Packing materials selection for a biofilter to bio-oxidize methane in coal mine gas

为给生物技术处理煤矿瓦斯气体的反应器选择一种合适的填料，以净化处于略大于瓦斯爆炸范围的甲烷含量为0—20％的甲烷与空气的混合气体为研究对象，采用实验室规模的生物膜填料塔，对陶粒滤料、蛭石以及生物挂膜陶粒3种填料的挂膜性能进行了比较．结果表明：陶粒滤料挂膜效果最差，反应器处理甲烷的能力也最弱，而以蛭石作为填料的反应器的抗冲击能力最差．相对于陶粒滤料以及蛭石而言，挂膜生物陶粒以其适宜的比表面积、粒径以及密度，用其作为填料的反应器能得到较大的处理甲烷能力以及较强的抗冲击能力，较适合作为处理煤矿瓦斯的生物反应器的填料．

For bio-oxidizing methane （with the concentration 0 - 20 % ） in coal mine gas with a biofilter, three kinds of packing materials, such as ceramic balls with small size, vermiculite and filtration porcelain balls with larger size, were studied in the biofiher. The results indicate that the capacity of the small size ceramic balls for biomass growth is the weakest, and the methane removal capacity of the biofilter with it is the worst. And the capability of the biofilter with vermiculite as packing material to standing against the wallop of the inlet gas is not satisfied. Compared with small size ceramic balls and vermiculite, the biofiher with large size filtration porcelain balls have the biggest capability to oxidize methane and to stand against the wallop of the inlet gas with its proper specific surface area, grain diameter and density, and is the most optimum one as the packing material for the biofiher to oxidize methane in coal mines.