Comparative study on the kinetic model and effect of sludge protein dissolution under the synergistic action of acid-thermal and alkaline-thermal

Sludge protein has been widely used in daily life.In this paper, based on the acidbase mechanism and kinetic model theory, kinetic models for the temperature, time, sludge concentration and acid-base concentration of the alkaline heating method and the acidic heating method were established.The kinetic model parameters were obtained using nonlinear optimization technology.The acid-base hydrolysis process and the influence laws of various factors were further analyzed based on the data model and parameters.The results show that the residual sum of squares (SSE) of the optimized parameter data of the data model obtained under acidic heating conditions is 6.37 × 10 7 , and the square sum of the correlation coefficient (R 2 ) is 0.848; the residual sum of squares (SSE) of the optimized parameter data of the data model obtained under alkaline heating conditions is 2.828 × 10 7 , and the square sum of the correlation coefficient (R 2 ) is 0.892.The data models obtained under the above two conditions more accurately describe the protein extraction process, and the data effect is good.Through the comparison of data parameters in the above kinetic research process, it is applied to the extraction of sludge protein.In the generation process of peptides and amino acids, the influence of sulfuric acid is greater than that of sodium hydroxide.Perhaps the acidic heating method is more conducive to promoting protein hydrolysis.