Drain the swill with clear water first, and then add other materials to reduce the water content to about 60%. The reference formula is: 1, and the discharged swill is 60-70%; 2. Corn flour10%; 3. Wheat bran 20-30%; 4. Premix1-2%; 5. Gymboree swill fermentation assistant is two thousandths. After mixing the materials, seal and ferment for one to three days according to the instructions.

A bag can ferment 2000 Jin of swill. The specific operation is as follows: firstly, the Gymboree swill feed starter is mixed with 3-5 kg of rice bran, and then mixed with 1000 kg of swill, 50 kg of soybean meal (rapeseed meal, cotton rapeseed meal and peanut bran), 10 kg of calcium hydrogen phosphate or calcium superphosphate (specially used for feed or preferably used as fertilizer). The general dosage is 1% ~ 1.5%, which is mainly used for calcium supplementation. After addition, bone meal is not needed to be added to the feed. Stir well, add proper amount of rice bran or whole bran (or straw powder, such as peanut straw and peanut shell powder) to adjust the water content of swill to: grab a handful of feed with your hands and hold it tightly until you see that there is water in your hands and it doesn't drip down. The container should be filled as much as possible without leaving air (this is to isolate air, keep anaerobic, use oxygen in the air to prevent harmful bacteria from growing and breeding, and kill all kinds of harmful bacteria that come with swill), then cover it with plastic film and tie it tightly with rubber rope, so it is not necessary to seal it tightly, leaving a little air to prevent excessive expansion or even explosion caused by a large amount of gas generated during fermentation.

Fermentation time: generally 2 ~ 3 days in summer, 3 ~ 4 days in spring and autumn and 4 ~ 7 days in winter. When some koji flavor is produced, fermentation is completed.