The production process for producing Luzhou Daqu is as follows.
First, raw material processing. Every 100 kg of wheat plus 5% to 10% of 80 °C hot water and mix well, seasoning 3 to 4 hours, so that wheat absorbs water, is conducive to crushing. Because the degree of comminution of wheat has a great influence on the quality of Daqu, the excessive viscosity is too high, the heat inside the embryo is not easy to dissipate, and it is easy to cause rancidity. If it is too thick, the viscosity is small, the moisture in the embryo quickly evaporates, and the heat is dissipated quickly, causing the embryo to overgrow. As early as dry or crack, microorganisms are not easy to reproduce. Therefore, the wheat skin is ground into flakes and the heart can be ground into a powder.
Second, spices. Koji courts and utensils must be cleaned to prevent bacterial infections. The amount of water added to each 100 kg of wheat flour should be controlled at 30% to 40% (including water for dressings). In summer, the lower the water temperature, the better, so as to avoid high temperatures and excessive temperature rise in the early stage. In winter, the water temperature should be 40-60°C and mix well. There should be no ash packs, no ash, and no sticky hands.
Third, step on music. The purpose is to use artificial or mechanically-blended medium to form a certain shape, which is conducive to the growth of the micro-organisms required for the growth of the solid medium. The mixed material is then loaded into the box. After installation, first use the soles of the feet to step from the center, then step on the toes and then step on the toes several times along the circumference of the embryo, step on, step on, step on, and step on the light. You can step on the middle slightly. Placed on the side of the stepping field is a stepped arrangement of the curved embryos. The temperature of the product is about 25°C.
Fourth, enter the room training. Daqu quality is good or bad, the key song embryo after the cultivating management.
1. Into the room Anqu: song room requires cleanliness. Before blasting into the room, the blast embryos should be cleaned first, and the husks should be sprinkled on the ground so as not to stick the embryos to the ground. The method of placing the curved embryos into the chamber is to pick up the curved embryos, one bucket for each four pieces, and the distance between the music and the music is 3 to 4 cm. There are 26 pieces of music on each square meter. In order, until it is full. There must be an empty space between the last line and the wall in order to turn over. After the embryos were laid, a layer of straw was placed on the embryos and then covered with a straw mat. Immediately sprinkle some water on it. The amount of water to be sprayed is based on wet straw mats. It is sprinkled with cool water in summer and hot water at 90°C in winter. Sprinkle, close the doors and windows to maintain the indoor temperature and humidity.
2. Culture: After 1 to 2 days in summer and 2 to 4 days in winter, the product temperature of the koji embryo rises, and many white spots appear on the surface of the koji embryo. The mould is standard. There are many white spots on the epidermis of the blastocyst. Good, after the mold was clean, the straw and straw mats were peeled off. A small open window in the song room allows the surface of the embryo to evaporate. When the surface of the embryo is slightly dry and sticky, it can turn over. The upper layer of the embryo is turned to the lower layer and the lower layer is turned to the upper layer. The distance between the embryos is 6-10 cm. After the stack is completed, straw and straw mats are still covered, and the doors and windows are insulated. However, the product temperature should not exceed 55-60°C. At any time, adjust the temperature with a method such as reducing cover grass and opening doors and windows. It will be turned once every 1-2 days. The method is as described above.
3. Finished product: Qufu embryo from the room to mature (dry), about 30 days, mature after the song can be stored in dry and ventilated room. The new song can be put into production after being stored for more than 3 months. The following observations (at the same time need to be crushed): (1) odor: a special song odor, can not have a sour smell; (2) rind thickness: the thinner the better; (3) appearance color: should have the same color White spots or flora; (4) Color of section: The growth of mycelium is white, and there should not be other colors doped; (5) physical and chemical indicators: moisture 10% to 14%; acidity 0.2% to 0.5%; starch 30% to 50%; saccharifying power 700 to 1400 enzyme activity unit/g; liquefaction force 2.1 to 8.5; protease 16 to 38.
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