Optimal adjustment method for anaerobic digestion process parameter

The invention discloses an optimal adjustment method for anaerobic digestion process parameters. The method comprises the steps that five key parameters, namely anaerobic jar temperature T, anaerobic jar pH, anaerobic jar slurry amount L, anaerobic jar slurry solid content G and anaerobic jar accumulative stirring duration J, are selected as independent variables, anaerobic digestion gas production Q is selected as a dependent variable, and a K nearest neighbor method is used to establish a fitting function; and a gas production function Q is optimized and analyzed, and a value of each key process parameter is solved when energy consumption is lowest and the anaerobic digestion gas production is maximum, wherein for an optimization problem of the anaerobic digestion gas production, the number of objective functions is three, namely Q, T and J, an evaluation function and three constraint conditions are constructed, and establishment of a mathematical model for multi-objective planning of the anaerobic digestio