Experimental study on biogas production through anaerobic digestion of wheat straw and urban fallen leaves

In this experiment, wheat straw and fallen leaves were used as the raw materials for solid-state anaerobic digestion (SS-AD). Straw, leaves and mixture of them were aerobic pretreated respectively. When the pretreated composting temperature raised to 313-328K, the raw materials were added to the test device and for SS-AD respectively. The comparison of the experiment results show that: the volatile solids (VS) gas production of the straw is higher than that of the fallen leaves. The fermentative materials of leaves have the most accumulation and the longest retention time of gas production. When the raw materials of straw and leaves at a ratio of 2:1 in the test of SS-AD, the biogas production will be increased.