Strength Characteristics of Biochar-Amended Clay Covered Soil Mixed with Methane-Oxidizing Bacteria

Adding biochar to soil can improve the soil’s physical–chemical properties, microscopic pore structure, and bacterial habitat. This affects strength characteristics oxidization of methane. Using a Humboldt pneumatic direct shear instrument, this study investigated effect amount in soil, methane-oxidizing bacteria, aeration time, carbon content on biochar-amended clay. The results show that when is low, stress–strain curve shows strain hardening state as increases. When greater than 10%, bacteria increase curves biochar–clay mixture all showed softened state. Under same content, softening methane filling time However, with an biochar, cohesion gradually increased internal friction angle did not change significantly. A scanning electron microscope (SEM) image oxidizing revealed influence evolution law samples’ micropore structure properties.