阅读说明：本技术 一种猪血豆腐的制备方法 (Preparation method of pig blood bean curd ) 是由 周永顺 于 2019-10-23 设计创作，主要内容包括：本发明提供了一种猪血豆腐的制备方法,属于食品加工技术领域,为保障血源安全,本发明对混合猪血进行动物检疫,检验合格方可继续处理；血管破裂后,血小板发生凝集反应,血液因此凝固。为了不发生凝集反应,本发明前期使用柠檬酸钠来防止血液凝固,后期再加入凝固剂,使产品完全凝固,从而保证稳定的产品口感；本发明在将收集过滤液和凝固剂混合后进行高压全水杀菌,使猪血豆腐常温能够保存,产品安全有保证。(The invention provides a preparation method of pig blood bean curd, which belongs to the technical field of food processing, and aims to ensure the safety of blood sources, the invention carries out animal quarantine on mixed pig blood, and the mixed pig blood can be continuously processed if the inspection is qualified; after the blood vessel is ruptured, the platelets undergo an agglutination reaction, and the blood is thus coagulated. In order to avoid agglutination reaction, the sodium citrate is used for preventing blood coagulation at the early stage, and the coagulant is added at the later stage to completely coagulate the product, so that the stable product taste is ensured; according to the invention, the collected filtrate and the coagulant are mixed and then are sterilized in full water under high pressure, so that the pig blood tofu can be stored at normal temperature, and the safety of the product is guaranteed.)

1. A preparation method of pig blood tofu comprises the following steps:

1) mixing the pig blood and sodium citrate to obtain mixed pig blood, carrying out animal quarantine on the mixed pig blood, and reserving qualified animal quarantine pig blood; the mass percentage content of the sodium citrate in the mixed pig blood is 0.88-0.90%;

2) filtering the qualified animal quarantine pig blood obtained in the step 1) by using a 70-100 mesh filter screen, collecting first filtrate, and cooling the first filtrate to 8-10 ℃ to obtain anticoagulation blood;

3) mixing the anticoagulation blood and the seasoning solution in the step 2), filtering the obtained mixture by using a 70-100 mesh filter screen, collecting a second filtrate, mixing the second filtrate with a coagulant, and performing high-pressure full-water sterilization to obtain the pig blood tofu.

2. The method according to claim 1, wherein the pig blood in step 1) is collected with a hollow blood collecting knife.

3. The method according to claim 1, wherein the cooling in step 2) comprises stirring cooling; the stirring procedure is stirring for 1min and 5min at intervals.

4. The method for preparing according to claim 1, wherein the seasoning solution in step 3) comprises common salt, chicken essence and water.

5. The method of claim 1, wherein the coagulant in step 3) comprises calcium chloride and water; the mass ratio of the calcium chloride to the water is 1: 666-667.

6. The preparation method according to claim 1 or 5, wherein the mass ratio of the coagulant to the second filtrate in step 3) is 93-96: 300-305.

7. The preparation method according to claim 1, wherein the procedure of the high-pressure all-water sterilization in the step 3) is as follows: 0.0-115.0 ℃, 0.0-0.18 MPa and 200 s; 115.0-122.0 ℃, 0.18-0.21 MPa and 300 s; 122.0-122.0 ℃, 0.21-0.21 MPa, 3600 s; 122.0-80.0 ℃, 0.21-0.05 MPa, 600 s; 80.0-50.0 ℃, 0.05-0.0 MPa and 600 s.

8. The method according to claim 1, wherein the time from the collection of the filtrate and the coagulant until the high-pressure all-water sterilization in step 3) is 5min or less.

9. The method according to claim 1, wherein the temperature of the mixture of the anticoagulation solution and the seasoning solution in the step 3) is 13.5 to 15.0 ℃.

10. The pig blood tofu prepared by the method according to any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of food processing, in particular to a preparation method of pig blood tofu.

Background

In the pig blood tofu industry, small-scale manufacturers are in many cases, and during blood collection, saliva, feces, hair and other foreign matters of pigs are often mixed in blood. In addition, in the production process, the blood is deteriorated and discolored due to the contact with air, and the blood coagulation principle is that the blood is coagulated immediately as long as the blood is discharged from the body, and the reaction is completed in a short time, so that the irregular shape of the product and the unstable property of the product can be caused. There is a need for a method for producing safe and sanitary pig blood tofu.

Disclosure of Invention

The invention aims to provide a preparation method of pig blood bean curd, which can ensure the safety and sanitation of the pig blood bean curd.

In order to achieve the above object, the present invention provides the following technical solutions:

the invention provides a preparation method of pig blood tofu, which comprises the following steps:

1) mixing the pig blood and sodium citrate to obtain mixed pig blood, carrying out animal quarantine on the mixed pig blood, and reserving qualified animal quarantine pig blood; the mass percentage content of the sodium citrate in the mixed pig blood is 0.88-0.90%;

2) filtering the qualified animal quarantine pig blood obtained in the step 1) by using a 70-100 mesh filter screen, collecting first filtrate, and cooling the first filtrate to 8-10 ℃ to obtain anticoagulation blood;

3) mixing the anticoagulation blood and the seasoning solution in the step 2), filtering the obtained mixture by using a 70-100 mesh filter screen, collecting a second filtrate, mixing the second filtrate with a coagulant, and performing high-pressure full-water sterilization to obtain the pig blood tofu.

Preferably, the pig blood in the step 1) is obtained by adopting a hollow blood collecting knife.

Preferably, the cooling manner in the step 2) comprises stirring and cooling; the stirring procedure is stirring for 1min and 5min at intervals.

Preferably, the seasoning solution in step 3) comprises table salt, chicken essence and water.

Preferably, the coagulant in step 3) comprises calcium chloride and water; the mass ratio of the calcium chloride to the water is 1: 666-667.

Preferably, the mass ratio of the coagulant to the second filtrate in the step 3) is 93-96: 300-305.

Preferably, the procedure of the high-pressure full-water sterilization in the step 3) is as follows: 0.0-115.0 ℃, 0.0-0.18 MPa and 200 s; 115.0-122.0 ℃, 0.18-0.21 MPa and 300 s; 122.0-122.0 ℃, 0.21-0.21 MPa, 3600 s; 122.0-80.0 ℃, 0.21-0.05 MPa, 600 s; 80.0-50.0 ℃, 0.05-0.0 MPa and 600 s.

Preferably, the time between the collection of the filtrate and the mixing of the coagulant in the step 3) and the high-pressure full-water sterilization is less than or equal to 5 min.

Preferably, the temperature for mixing the anticoagulation blood and the seasoning solution in the step 3) is 13.5-15.0 ℃.

The invention also provides the pig blood tofu prepared by the preparation method in the scheme.

The invention has the beneficial effects that: the invention provides a preparation method of pig blood bean curd, in order to ensure the safety of blood sources, the invention carries out animal quarantine on mixed pig blood, and the mixed pig blood can be continuously processed after being qualified; after the blood vessel is ruptured, the platelets undergo an agglutination reaction, and the blood is thus coagulated. In order to avoid agglutination reaction, the sodium citrate is used for preventing blood coagulation at the early stage, and the coagulant is added at the later stage to completely coagulate the product, so that the stable product taste is ensured; according to the invention, the collected filtrate and the coagulant are mixed and then are sterilized in full water under high pressure, so that the pig blood tofu can be stored at normal temperature, and the safety of the product is guaranteed.

Drawings

FIG. 1 shows the results of the hygiene test of the blood collected by the hollow blood collection system (temporary storage tank) and the blood collected by the lancet bleeding system (bleeding tank) in example 2;

FIG. 2 shows the results of shelf life tests of the porcine blood product of example 3.

Detailed Description

The invention provides a preparation method of pig blood tofu, which comprises the following steps:

1) mixing the pig blood and sodium citrate to obtain mixed pig blood, carrying out animal quarantine on the mixed pig blood, and reserving qualified animal quarantine pig blood; the mass percentage content of the sodium citrate in the mixed pig blood is 0.88-0.90%;

2) filtering the qualified animal quarantine pig blood obtained in the step 1) by using a 70-100 mesh filter screen, collecting first filtrate, and cooling the first filtrate to 8-10 ℃ to obtain anticoagulation blood;

3) mixing the anticoagulation blood and the seasoning solution in the step 2), filtering the obtained mixture by using a 70-100 mesh filter screen, collecting a second filtrate, mixing the second filtrate with a coagulant, and performing high-pressure full-water sterilization to obtain the pig blood tofu.

In the invention, before mixing the pig blood and the sodium citrate, the preferable method also comprises the step of collecting the pig blood by adopting a hollow blood collecting knife, wherein the pig used for collecting the pig blood is stunned by carbon dioxide; the part for collecting the pig blood is preferably the neck artery of the pig; in the specific implementation process of the invention, the hollow blood sampling knife is replaced by a hollow blood sampling system; the hollow blood collection system was purchased from MAREL red meat slaughter systems, inc. Before the pig blood is collected, the pig source is preferably controlled, the live pig for collecting the blood is purchased from a farm matched with an industrial chain, the pig source can be traced, and the pig source is quarantined before slaughtering, so that the pig source is safe and controllable.

After obtaining the pig blood, mixing the pig blood with sodium citrate to obtain mixed pig blood, carrying out animal quarantine on the mixed pig blood, and keeping the qualified pig blood for animal quarantine; the mass percentage content of the sodium citrate in the mixed pig blood is 0.88-0.90%. The effect of mixing the pig blood and the sodium citrate in the invention is to control the pig blood not to generate coagulation phenomenon in the production process.

After obtaining qualified animal quarantine pig blood, filtering the qualified animal quarantine pig blood by a 70-100 mesh filter screen, collecting first filtrate, and cooling the first filtrate to 8-10 ℃ to obtain anticoagulation blood; the aperture of the filter screen is preferably 80-90 meshes; the filtering function is to remove foreign matters attached to the live pigs such as pig hair; the cooling temperature is preferably 5-10 ℃, and more preferably 8-9 ℃; in the specific implementation process of the invention, the cooling temperature is 8-10 ℃ in winter (11-3 months); in summer (4-10 months), the cooling temperature is 5-10 ℃; the cooling mode preferably comprises stirring cooling and refrigerant cooling; the stirring and cooling procedure is preferably stirring for 1min and intermittent stirring for 5 min; the storage temperature of the anticoagulation is preferably 8-10 ℃; the storage time of the anticoagulation is less than or equal to 24 h; the cooled device is preferably a refrigerated blood storage tank which is required to be cleaned by CIP before pig blood is collected again.

After cold coagulation is obtained, mixing the anticoagulation blood and the seasoning solution, filtering the obtained mixture by using a 70-100-mesh filter screen, collecting a second filtrate, mixing the second filtrate with a coagulant, and then performing high-pressure full-water sterilization to obtain pig blood tofu; the seasoning solution preferably comprises salt, chicken essence and water; the invention has no special limit on the proportion of the salt, the chicken essence and the water, and the common setting in the field is adopted; in the specific implementation process of the invention, the seasoning solution preferably comprises the following raw materials in percentage by mass: 0.3 to 1 percent of salt, 0.2 to 1 percent of chicken essence and 0 to 50 percent of water; the mass ratio of the anticoagulation solution to the flavoring solution is preferably 400: 289.33; the mixing temperature of the anticoagulation and seasoning solution is preferably 13.5-15.0 ℃, and more preferably 14-14.5 ℃; the anticoagulant and flavoring solution is preferably mixed by stirring; the invention has no special limit on the mixing time and the stirring rotating speed, and takes uniform mixing as the standard; the particle size of the filter screen is preferably 80-90 meshes; the coagulant preferably comprises calcium chloride and water; the mass ratio of the calcium chloride to the water is preferably 1: 666-667, and more preferably 1; 666.65, respectively; the mass ratio of the coagulant to the second filtrate is preferably 93-96: 300-305, and more preferably 94-95: 302-304.

In the invention, after the collected filtrate is mixed with the coagulant, the preferable steps of filling and sealing and diameter pressing are also included; the filled container is preferably a pig blood box made of PP (specification: 147mm in length, 88mm in width, 39.3mm in height and 0.65mm in thickness); the pig blood box made of the PP material is beneficial to carrying, transporting and using pig blood bean curd; the sealing film matched with the pig blood box preferably comprises 2 layers of PET-PA sealing films and 3 layers of PET-PA-RCPP films; the temperature of the seal is preferably 175 ℃ for 2 layers of PET-PA films and 185 ℃ for 3 layers of PET-PA-RCPP films; the temperature of the diameter pressing is preferably 180 ℃ for 2 layers of PET-PA films and 189 ℃ for 3 layers of PET-PA-RCPP films; after the sealing and the diameter pressing, the invention carries out high-pressure full-water sterilization; the high-pressure full-water sterilization program is preferably as follows: 0.0-115.0 ℃, 0.0-0.18 MPa and 200 s; 115.0-122.0 ℃, 0.18-0.21 MPa and 300 s; 122.0-122.0 ℃, 0.21-0.21 MPa, 3600 s; 122.0-80.0 ℃, 0.21-0.05 MPa, 600 s; 80.0-50.0 ℃, 0.05-0.0 MPa, 600 s; the time from the collection of the filtrate and the mixing of the coagulant to the high-pressure all-water sterilization is preferably 5min or less so as not to affect the molding effect.

After the pig blood bean curd is prepared, the equipment for preparing the pig blood bean curd is preferably cleaned by CIP (cleaning in place) and the pipeline is cleaned by using an acid-base cleaning agent in the whole process after the production is finished, so that the safety and the sanitation of the production link are ensured; the acid-base cleaning agent is not particularly limited and is commercially available.

After the pig blood tofu is prepared, the content and microorganism detection of the pig blood tofu are preferably carried out; the net content of the pig blood bean curd is more than or equal to 300 g/box, and the solid content is more than or equal to 260 g/box; the microorganism detection is preferably commercial sterility detection, and the qualified microorganism detection can be regarded as a qualified product.

The invention also provides the pig blood bean curd prepared by the preparation method; the storage temperature of the pig blood bean curd is preferably 2-25 ℃, and more preferably 8-20 ℃.

The technical solutions provided by the present invention are described in detail below with reference to examples, but they should not be construed as limiting the scope of the present invention.