of Leting, Hebei province, China. The results showed that the biogas can be produced in a
short time, and the methane percentage was over 40% on the second day by co-digestion of
cornstalk and garden leaves. This kind of biogas was already suitable for the ignition. The
daily biogas production was nearby 1 m 3 with the methane percentage around 54% which
can satisfy the needs of daily biogas using by family of three people. The biogas residue can …