| This study used the residual residue from apricot kernel grinding as the raw material to compare the effects of five different treatment methods—water extraction, alkaline extraction, cellulase hydrolysis, ultrasonic treatment, and ultrasonic-assisted cellulase hydrolysis—on the dissolution rate of residual protein in the apricot kernel grinding residue, as well as on the structure and surface hydrophobicity of the dissolved protein. On the basis of screening out the optimal method and conducting single-factor experiments, response surface optimization experiments were adopted to explore the optimal process parameters for promoting protein dissolution from the apricot kernel grinding residue using the ultrasonic-assisted cellulase method. The results showed that when the treatment time was 30 min, the protein dissolution rates of the five methods were 4.79%, 14.76%, 15.41%, 25.38%, and 35.38%, respectively; the ultrasonic-assisted cellulase method exhibited a significantly better effect than the other methods. The optimal process for promoting protein dissolution from the apricot kernel grinding residue via the ultrasonic-assisted cellulase method, optimized by response surface methodology, was as follows: cellulase addition amount of 650 U/g, solid-liquid ratio of 1:23 (g/mL), ultrasonic power of 240 W, and ultrasonic treatment duration of 41 min. Under these conditions, the actual extraction yield reached 41.94%. The research results can provide important guidance for the improvement of industrial apricot kernel grinding processes and the efficient utilization of proteins. |
