Device for measuring biochemical methane potential

The present invention discloses a device for measuring biochemical methane potential, comprising a water bath container. The device for measuring biochemical methane potential further comprises an anaerobic digestion container which is provided with a sealed opening; the lower side of the top of the anaerobic digestion container is provided with an internal ring hollow cavity structure with the side wall of the anaerobic digestion container as the external wall; the inner wall of the internal ring hollow cavity structure is provided with a gas through hole while and the outer wall is provided with a liquid through hole; the gas through hole is arranged above the liquid through hole in the vertical direction; the internal part of the anaerobic digestion container is communicated with that of the water bath container through the gas through hole and the liquid through hole when the opening of the anaerobic digestion container is sealed; and the anaerobic digestion container is further provided with a gas sampler, and scales are arranged on the outer wall of the anaerobic digestion container. The device for measuring biochemical methane potential is unnecessarily connected with a pipeline, thereby reducing the possibility of gas leakage and improving the accuracy and the reliability of measurement.