Anaerobic digestion stability determination method

The invention discloses an anaerobic digestion stability determination method, which comprises the following steps: diluting a small amount of digestion liquid with different anaerobic digestion time, and filtering to obtain anaerobic digestion liquid soluble organic matters; carrying out three-dimensional fluorescence spectrum analysis on the dissolved organic matters in the anaerobic digestion solution, and carrying out standardization treatment on the collected three-dimensional fluorescence spectrum; superposing the Stokes shift atlas with the standardized three-dimensional fluorescence spectrums of the anaerobic digestion solution dissolved organic matters at different collection times, and calculating the distribution of fluorescence intensity at different Stokes shifts; when the Stokes shift distribution curve of the fluorescence intensity has a peak at 0.851.15 [mu]m, considering the anaerobic digestion to be stable. The method has the advantages of high analysis speed, small sample amount, no use