不同填料的人工湿地生物膜特性与处理效果研究

he biomass and the biological activity of four lightweight aggregates and a crushed lime stone are compared to explain their different effects as fillers in constructed wetland to dispose sanitary waste water. The higher the inner specific surface area and the interconnected porosity of the filler, the better the disposing effect is. The biomass and the biological activity of all the lightweight aggregates are higher than those of the lime stone, and the best filler is expanded clay lightweight aggregate, of which the specific area and the connectivity porosity are much higher than others.