Industrial production method for obtaining chlorella protein peptide by acid enzyme method

The invention relates to an industrial production method for obtaining chlorella protein peptide by an acid enzyme method. The industrial production method comprises the following steps: (1) performing swelling treatment on chlorella powder to obtain chlorella feed liquid; (2) performing acid hydrolysis: adding hydrochloric acid into the chlorella feed liquid obtained after swelling in the step (1) for hydrolysis; (3) performing enzymolysis: adjusting the pH value of the chlorella feed liquid subjected to the acid hydrolysis to 7-9, then sequentially adding cellulase, alkaline protease, papainand neutral protease at the temperature of 45-60 DEG C, performing enzymolysis for 4-8 hours, and filtering out chlorella residues in enzymatic hydrolysate after enzyme deactivation, so as to obtainsupernatant; (4) decolorizing the supernatant to obtain a decolorized solution; and (5) filtering the decolorized solution obtained in the step (4) to obtain a chlorella protein peptide solution, andperforming spray drying on