High nutritional value, whole blood protein content is 18.9%, contains 18 kinds of amino acids, 8 of which are essential amino acids, except for phenylalanine and sulfur-containing amino acids, other are close to the FAO/WHO recommended model Second only to whole egg protein. It is particularly important that pig blood is rich in porphyrin iron, which is easily absorbed by the body. Therefore, it is a good iron supplement and has a good effect on the treatment of iron deficiency anemia. China is a world-renowned pig country, with 3.8-4.2 million live pigs being released annually, and pork blood resources ranking first in the world with an annual output of more than 1.2 million tons. At present, the utilization rate of domestic pig blood is very low, mainly in the form of blood meal feed, and there are few products for direct human consumption, only a small amount of blood sausage, loose blood tofu and so on, still hand-workshop type processing, industrialization Production and large-scale sales of pig blood foods are still blank. In response to the above situation and the requirements of the manufacturers, Tianjin Food Research Institute has successfully developed boxed porcine blood tofu, which has been produced and sold. The products are very popular and have achieved considerable economic and social benefits. First, the process: blood collection → filtration → ingredients → degassing → loading → solidification → sterilization → inspection → finished product storage. Second, the operating points 1. Blood collection: Quarantine-qualified pigs can be slaughtered on the production line. Hollow knives are used to collect the whole blood in a numbered container. A predetermined amount of anticoagulant is added in advance in the container, and the mixture is released after the quantitative mixing. Record the corresponding number of the blood in the container and the pig. After the meat inspection is completed, it is confirmed that no disease pollution can be processed. In addition, the container should not be too large to allow the blood to cool down in time. 2. Filtration and decolorization: The cooled blood is filtered through a concave sieve to remove a small amount of clot and mixed with a certain concentration of salt solution; a degassing tank is placed to perform vacuum degassing. Degassing temperature 40C, vacuum degree 0.08-0.09MPa, time is about 5min. 3. Batching and boxing: Add the coagulation factor activator to the degassed blood, mix it evenly and pack it into the box quickly, so that it will naturally solidify within 15 minutes. 4. Sealing box: The blood material is solidified in the box, and the blood stained on the edge of the box is wiped clean, and the box can be sealed with a heat sealer. Check the seal after sterilization. 5. Sterilization: Sterilization: water sterilization for 15-0 seconds, back pressure cooling -21C. 6. Inspection: The product after sterilization can be stored without any damage, leakage or deformation. Third, safety and health requirements Because blood is a good nutrient matrix, deteriorated quickly after contamination, therefore, in the production process, plant, equipment, containers and operators of the health requirements are very strict. Equipment and containers must be regularly cleaned and disinfected, and protective gloves and overalls used by operators must be complete and clean. In particular, the blood collection operation should pay more attention to safety protection. In the event of a bumping accident, it must be replaced immediately. The injured person must be treated by a doctor before leaving the factory. IV. Product Features The product is hygienic and safe, and the sales process is non-polluting. The shelf life at room temperature in summer is 15 days, and the winter is extended. The product has a large sales market. The product is packaged and sterilized after being naturally solidified, so its elastic taste and cooking process performance are better than thermal coagulation products. The product is rich in nutrients and complements the use of cereals. It is more beneficial to human body absorption and long-term consumption is beneficial to health.