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A process for producing fish peptone using a grinding pump to grind fish lysate The grinding pump grinding application includes the following steps:
(1) Blending: Add appropriate amount of water to the fish lye stock solution to make a fish lye with 80% water content.
(2) Sterilization: Increase the temperature to 90 degrees and sterilize using infrared rays.
(3) Separation of crude fat: The resulting fish slurry is sent to a horizontal centrifuge and a butterfly centrifuge successively to separate the crude fat in it until the residual amount is less than 1%.
(4) Removal of salt: The resulting fish paste is passed through a resin separation device to remove the salt in the fish paste until its content is less than 0.04%.
(5) Enzymatic hydrolysis: Add 1% PROTEXP enzyme to carry out enzymatic hydrolysis at 45 degrees water temperature for 4 hours to make the fish lysate into small molecules.
(6) Homogeneous grinding and emulsification: maltodextrin and denatured starch are mixed in a certain proportion and added to the fish syrup, after Haoxing colloid mill-pipeline grinding pump-multi-function grinding machine (using unit: Ocean God Group, Rongcheng Haisheng Feed Co., Ltd., Guangzhou Genda Agricultural Technology Development Co., Ltd., Ningbo Haizhongyuan Biological Technology Co., Ltd., Rongcheng Hefeng Biotechnology Co., Ltd. and other water-soluble slurry feed and water-soluble fertilizer production plants) grinding pumps are similar or identical to those at home and abroad Compared with the model specifications, the colloid mill saves electricity by 50-60%, the grinding disc (rotor and stator) grinding loss is also low, energy saving and high efficiency. Afterwards, it enters the high-pressure homogenizer for homogenization and emulsification.
(7) Concentration: The resulting fish solution slurry is sent to a vacuum low-temperature concentration tank, the temperature is controlled at 60 degrees, the vacuum degree is -0.095, and a fish solution slurry with a water content of 40% is obtained in 4 hours.
(8) Drying: enter the centrifugal spray dryer for drying, to obtain light yellow powder with water content not higher than 5% and total nitrogen higher than 13%.
2. Preparation of protein fertilizer
(1) Sterilization treatment of fish solution slurry: Chlorine gas was introduced into the fish solution slurry to maintain the chlorine content in the fish solution slurry at a concentration of 1 mg/L, and sterilization treatment was carried out for 10 minutes.
(2) Deodorization treatment of fish dissolving paste: heat the fish dissolving paste after sterilization treatment at 60°C for 30 minutes, add diatomite added in an amount of 5% by weight of the fish dissolving paste to remove the fish dissolving paste itself Odor and residual chlorine.
(3) Preparation of fish viscera enzyme extract: take the fish offal after processing, wash it, crush it in 0℃ environment, add 0.5% KCl aqueous solution with mass percentage concentration pre-cooled to room temperature, ultrasonically disperse for 20 minutes, homogenize The slurry was centrifuged at 3000r/min for 10 minutes, and the supernatant was filtered to obtain fish visceral enzyme extract.
(4) Enzymatic hydrolysis treatment: add the prepared fish offal enzyme extract to the sterilized and deodorized fish lye, the amount of the enzyme extract is 5% of the mass of the fish lye, the fish after adding the enzyme extract The solution was digested in a sterile environment at 30°C and a pH of 6.5 for 5 hours. After the digestion was completed, the resulting enzymolysis solution was deactivated at 90°C for 5 minutes, and 15°C/min was used during the deactivation process Rapid heating rate.
(5) Drying and crushing: freeze-drying the fish paste processed in step (4) and then crushing it to make protein fertilizer, in which the freezing temperature during freezing and drying process is -30℃, the vacuum degree is 50Pa, and the heating temperature is 60℃, Drying time 5h.
Off fishy [4]
(1) Fish paste sterilization: put the fish paste in a UV environment for sterilization for 30 minutes;
(2) Preparation of photocatalytic deodorant: The preparation of the photocatalytic deodorant includes the following steps:
(1) Raw material preparation for deodorizing agent: deodorizing agent is prepared according to the following mass percentage: nano-scale rutile titanium dioxide powder 20%, chabazite powder 80%;
(2) Preparation of deodorizing agent: after mixing the deodorizing agent raw materials, add water twice the mass of the raw material powder, after stirring, ultrasonically disperse for 40 minutes, after the dispersion is completed, the mixture is dried and pulverized, and the resulting mixed powder is over 100 Mesh screen
(3) Photocatalytic deodorization: Weigh the deodorization agent according to the mass ratio of deodorization agent to fish dissolving slurry is 1:10, put the deodorization agent into the filter bag according to the specifications of 1 to 5 grams per bag, and filter the mesh bag The pore size of 0.2mm, put the filter bag with deodorant into the fish solution slurry and stir for 1 hour under the light of high-pressure mercury lamp light source;
(4) Separation of deodorant: remove the filter bag containing deodorant to obtain deodorized fish dissolving slurry.