The invention relates to the technical field of biological
fermentation, and particularly discloses a preparation method of enzymolysis
oyster juice, which comprises the following steps: mixing
oyster meat and water, pulping, and
grinding to obtain
oyster slurry; then
protease is added into the oyster pulp for enzymolysis for 10-14 h; after the enzymolysis is finished,
activated carbon is added into the oyster
slurry after the enzymolysis for adsorption, stirring and heat preservation are carried out, the heat preservation temperature is 75-85 DEG C, then concentration is carried out, and concentrated oyster
slurry is obtained; adding edible salt into the concentrated oyster slurry, cooling to
room temperature, and then carrying out filter pressing treatment to obtain the enzymolysis oyster juice. The enzymolysis time of the oyster meat is prolonged, the
protein utilization rate of the oyster meat and amino
nitrogen of the oyster juice can be increased, the mode of combining medium-temperature concentration with physical deodorization is adopted, the oyster fragrance of the oyster juice can be well reserved, the
protein utilization rate of the oyster meat and the yield of the oyster juice are increased, the bitter and scorched taste of the oyster juice is reduced, and the
flavor of the oyster juice is improved; and the quality of the oyster sauce is improved by applying the additive to the oyster sauce.