CN1049104C - Method and apparatus for pressure sterilizing of food - Google Patents
Method and apparatus for pressure sterilizing of food Download PDFInfo
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- CN1049104C CN1049104C CN96101183A CN96101183A CN1049104C CN 1049104 C CN1049104 C CN 1049104C CN 96101183 A CN96101183 A CN 96101183A CN 96101183 A CN96101183 A CN 96101183A CN 1049104 C CN1049104 C CN 1049104C
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The present invention discloses a method and a device for high-pressure sterilization of foods. The method of the present invention comprises: the pressure of a packaged material degassed and sealed in vacuum is relieved after the pressure of the packaged material is maintained in a high-pressure container at the room temperature at the static pressure of higher than 300MPa for 1 second to 30 minutes, and dioctyl sebacate is used as a pressure medium. The device of the present invention is composed of a high-pressure container part and a pressure boosting system, wherein the high-pressure container part is composed of a single-layer barrel body, a sealing element, a fixed framework, etc., and the single-layer barrel body is made of high-strength steel. The barrel body of the high-pressure container has the advantages of high strength and long service life after the barrel body is treated in a self-reinforcing mode. The foods treated with the method can be stored for a long time while nutrient components and natural flavors are maintained. The method and the device can be used for the sterilizing treatment of foods, beverages, pharmaceuticals, etc.
Description
The present invention relates to autoclaved method and device, particularly relate to food is carried out the fresh-keeping method and apparatus of autoclaving.
The conventional method of food sterilizing is a heating.Though heating can reach sterilization effect, food has been caused adverse effects such as variable color, spoiled and nutritive loss.Therefore, development in recent years the pressure sterilizing of food method.Pressure sterilizing of food is that food is packed in the high-pressure bottle, pressurize certain hour under the static pressure more than the 100MPa, thus reach the sterilization purpose.After HIGH PRESSURE TREATMENT, the bacterium in the food is killed, and enzyme loses activity, and nutritions such as vitamin are unaffected, and fragrance and pigment all do not change yet.Thereby really realized not only sterilizing but also can keep natural flavour mountaineous purpose through the food of HIGH PRESSURE TREATMENT.Pressure sterilizing of food generally needs the above pressure of 300MPa just can reach practical purpose as at room temperature carrying out.Even so, also only be that overbased acidic food effect is better, and centering, low acidity food still are difficult to reach commercial sterilization requirement.For improving sterilization effect, can adopt two kinds of methods.A kind of is to increase substantially sterilization pressure, and another kind is to take pressurization and heat (or cooling) to match.In general, increase substantially sterilization pressure and will cause that equipment is huge, cost is high, and the also corresponding increasing of technical difficulty.And adopt pressurization and heat (or cooling) though the method that cooperates can reduce sterilization pressure, heating or lowering the temperature to make food quality be under some influence, and causes equipment complicated; Simultaneously, there is the antagonism problem, also makes its technology complicated owing to add gentle pressurization.As the public Reported of Japanese 《 Gong Open Te Xu " the flat 5-49457 peace of Suo Gong Open De Te Open 4-198642 adopts on the basis of heating high-pressure again.Though this can reduce processing pressure to a certain extent, soakage device in the heater that high-pressure bottle must be provided with, the container and sealing thereof etc. cause equipment and process complications, efficient reduction, cost to rise.The Japan Patent Shen disclosed method of peaceful 3-133727 is HIGH PRESSURE TREATMENT under the room temperature basically, but only can handle the peracidity food of pH value below 3.6, and centering, low acidity food then are difficult to reach commercial sterilization requirement.In addition, used high-pressure medium is water in said method, and is under high pressure more serious to equipment corrosion, must reduce service life of equipment.With regard to the food high-pressure treatment apparatus, two classes are arranged at present.One class is indirect boost type, and promptly pressure medium is sent into high-pressure bottle by the road by pressure generator.Another kind of is the direct adding pressure type of pressure vessel inner carrier.The disclosed equipment of the flat 5-49457 of Japan Patent application Te Open is indirect boost type, has added heating and soakage device.Limited by equal heat request, the draw ratio of this equipment mesohigh container can not be done greatlyyer.Thereby, improve the container compressive resistance, must select extraordinary quality material for use or strengthen the container frame size.Equipment is huge, cost is high but this must cause." food and machinery " (total 33 phases, P38～40 in 1991) have introduced another kind of indirect boost type high-pressure treatment apparatus.The inside and outside double-layered cylinder structure that the high-pressure bottle of this device is partly made for high-strength stainless steel.Inner/outer tube is that hot jacket is assembled.The lamination framework supporting that the upper and lower covers of cylindrical shell is manufactured with high-strength steel sheet.The working pressure of this device is about 400MPa, and dischargeable capacity is 50 liters.Because this device adopts high-strength stainless steel and double-decker, thereby cost height, manufacturing process complexity.In addition, the lamination supporting frame structure of its cylindrical shell upper and lower covers is huge, and the internal volume of container is restricted, and complicated operation, and production efficiency is low.The permission working pressure of this device is also lower simultaneously, the requirement of acidity, the commercial sterilization effect of low acidity food in being difficult to satisfy.
The purpose of this invention is to provide a kind of method and apparatus that at room temperature food is carried out the autoclaving processing.The method that is provided wants that technology is simple, efficient is high, cost is lower; Not only can handle peracidity food, in also can handling, low acidity food; It is good to human body nonhazardous, serviceability that used pressure medium does not have burn into to equipment.The device that is provided should be simple in structure, cost is lower, compressive resistance is high, and vessel volume can be done greatlyyer, and is easy to operate, and production efficiency is higher.
The object of the present invention is achieved like this:
Its process is:
A. the material to be processed that cleans up is packed into and carry out in flexibility or the semirigid packet container after vacuum outgas is handled vessel port being sealed.
B. the flexibility of good seal or semirigid packet material are packed in the high-pressure bottle, perhaps, the packing materials of good seal are packed into after with the flexible jacket involution in the high-pressure bottle.
C. at room temperature with the pressure that fills in the high-pressure bottle with 〉=300MPa, its pressure medium is a di-n-octyl sebacate.
D. removal pressure after 1 second to 30 minute keep-ups pressure.
E. taking out packing materials cleans also dry.
In said method, the vacuum that vacuum outgas is handled is 0.02～0.08MPa.For not only guaranteeing sterilization effect but also can raising the efficiency, according to the difference of material to be processed pH value, sterilization pressure and the dwell time can be respectively at 400～700MPa with selected in the scope in 5～20 minutes.
The high-pressure treatment apparatus of realizing above-mentioned process comprises: booster system is made up of the reciprocating type extra high pressure charging machine of double plunger, combination valve and pressure duct; High-pressure bottle is the individual layer tubular construction, and the two ends of cylindrical shell are respectively with seal plug and potted component sealing.The front end of cylindrical shell connects with front plate 3,6 and support plate 5 with bolt, and forward end seal plug 15 is fixing by cushion block 2 and front plate 3.The rear end of cylindrical shell and rear plate 10,11 usefulness bolts combine as a whole, and back-end sealing plug 14 is fixing by rear plate 11.The high-pressure medium of being carried by booster system advances the cylindrical shell 8 that round enters high-pressure bottle on the seal plug 14 of back, thereby realizes the autoclaving processing to material in the container.During work, its axial load is finally born by cylindrical shell.
For improving vessel strength and service life and reducing container wall thickness, shell is made of high strength steel, and handles through self-reinforcing, and this moment, the wall ratio of cylindrical shell should be more than or equal to 1.2.
For guaranteeing sealing effectiveness, the potted component between cylindrical shell and seal plug combines with delta-ring 17, leather mat 18 and O type circle 19.Delta-ring is done with steel or copper.For ease of packaged food pack into container and taking-up, be provided with the bin that is used to hold food in the cylindrical shell.The version of bin can be basket type, tubular or flute profile.
Method and apparatus of the present invention has realized that at room temperature the autoclaving of centering, low property food is handled.Its technology is simple, efficient is high, cost is low.Used high-pressure medium nonhazardous, no burn into easy cleaning, processing performance are good, and can be repeatedly used.The cylindrical shell of its high-pressure bottle is a single layer structure, and manufacture craft is simple, with low cost; The supporting structure of cylindrical shell termination is also greatly simplified, and has not only reduced cost, and has reduced the volume of whole device, makes the dischargeable capacity of container can do greatlyyer, thereby has improved production efficiency.Cylindrical shell adopts high strength steel to make, and handles through self-reinforcing, and the compressive resistance and the service life of container are greatly improved.In addition, its supporting and the bin structure also make the packaged food material pack into cylindrical shell and the taking-up more convenient.
Below the present invention is described in further detail.
Fig. 1 is the autoclaving pressure and the sterilization effect relation curve of fruit juice.
Fig. 2 is the autoclaving dwell time and the sterilization effect relation curve of fruit juice.
Fig. 3 is the high-pressure bottle contour structures schematic diagram among the present invention.
Fig. 4 is the structural representation of embodiment of the invention mesohigh container part.
Fig. 5 is the sealed structural representation of Fig. 4 middle cylinder body two ends.
Fig. 6 is an A-A cross-sectional view among Fig. 4.
In causing food apoilage all multifactor, the effect of microorganism and enzyme ranks first.After HIGH PRESSURE TREATMENT, the catalytic reaction of enzyme is suppressed in the food, and promptly high pressure can cause the inactivation of enzyme in the food.And high pressure is comparatively complicated to action of microorganisms.The effect of pressure sterilizing of food and its Acidity of Aikalinity are closely related.In packing industry, the food of pH value below 4.6 is peracidity food, the food of pH value 〉=4.6 be in, low acidity food.Clostridium botulinum and pathogen are difficult for breeding in peracidity food, get final product long preservation so generally handle under lower pressure.As to pH value less than 4 Citrus peracidity food, yeast, mould, lactic acid bacteria etc. are its rotten corrupt main causes.Under 400MPa pressure, handle and these microorganisms can be reduced or kill in 10 minutes, make such shelf life storage reach the several months to a year and a half.Therefore, at room temperature overbased acidic food carries out the autoclaving Preservation Treatment without a doubt.Bigger to the fresh-keeping then difficulty of the autoclaving of the higher middle low acidity food of pH value.Its solution route as previously mentioned, the one, increase substantially processing pressure, be in addition the heating or the cooling in impose suitable high pressure.Undoubtedly, no matter heat with pressurization and combine, still cooling combines with pressurization, all is required to be high-tension apparatus and installs devices such as special heating (or refrigeration), samming, thermometric.This not only makes high-tension apparatus complicated, and autoclaving complex process, efficient are reduced.And the installing of various auxiliary equipments and the alternate stress of temperature, pressure also can make shorten the fatigue life of high-tension apparatus.Though and equipment is arranged the method that improves processing pressure under the employing room temperature and technology is simple, the treatment effeciency advantages of higher,, also must match with it simultaneously with suitable technology to having relatively high expectations of the structural strength of high-pressure bottle, fatigue life.The present invention adopts suitable technology and special device to match to realize its purpose.
The present invention adopts flexibility or semi rigid receptacle as the packing container of material to be processed, before autoclaving the material in packing is carried out vacuum outgas and gives processing.Handle through the degassing, with the minimizing of air in the packing container, variously cause the bacterium of food spoilage to reduce, the condition of bacteria living also is restricted, thereby has prolonged the storage life of food.Simultaneously, vacuum outgas is handled and is helped guaranteeing the integrality of packing container, and also can directly improve the efficient that autoclaving is handled.This be because, to packaging for foodstuff the time, it is inevitable having a certain amount of gas in the packing, because the volume of survival gas almost is compressed into zero when HIGH PRESSURE TREATMENT, compare with no gas situation, the variation of this volume has increased the load of packing container virtually, very easily causes container deformation or destruction.And this gas volume is directly restricting the pressure and the time of HIGH PRESSURE TREATMENT.This gas flow is many more, and the pressurization energy that is consumed is big more, and is consuming time also long more.This not only causes efficient to reduce, and supercharging equipment has been proposed requirements at the higher level when meaning the processing pressure that will reach same.After the vacuum outgas of appropriateness is handled, these problems have been eliminated basically.Particularly as adopting pliability bag shape packing container preferably, its effect is better.The vacuum of vacuum outgas generally is controlled in 0.02～0.08MPa scope and is advisable.Through pack into the form of high-pressure bottle of the packing materials of vacuum outgas and good seal can be directly to pack into, also can be again with flexible jacket one of packing materials or several be packed into behind the involution together.The latter's purpose mainly is to be convenient to clean after food pollution and the HIGH PRESSURE TREATMENT in order further to prevent.Flexible jacket is reusable.
Because the food HIGH PRESSURE TREATMENT is to carry out under the pressure more than the 100MPa, so pressure medium is also had specific (special) requirements.Under lower pressure, it is incompressible that liquid is considered to.But under high pressure, most liquid are along with the increase volume of pressure is compressed gradually.For improving HIGH PRESSURE TREATMENT efficient, require the compressibility of high-pressure medium as far as possible little.Along with the increase of pressure, the viscosity of pressure medium increases, the mobile reduction, thereby influence the function that medium transmits pressure.So require pressure medium under high pressure to keep flow-like preferably.For avoiding causing high-pressure installation to lose efficacy and the accident generation because of solidification phenomenon under high pressure takes place pressure medium, pressure medium under high pressure should have the coagulability of being difficult for.Be the service life of prolongation supercharger, valve, moving sealing element etc., and obtain reliable superhigh pressure sealing effect and higher mechanical efficiency, pressure medium need have good lubricity and non-corrosiveness.Hygiene is the essential condition of food processing, and therefore, pressure medium must nonhazardous, pollution-free.Consider the security after contingency is leaked, pressure medium also should have higher ignition point.The present invention selects for use di-n-octyl sebacate as pressure medium, satisfies above-mentioned every requirement fully.Particularly this medium good fluidity under high pressure makes high-pressure treatment apparatus more easily be raised to high pressure; It is good that equipment is not had the burn into lubricity, thus make that equipment easily maintains, prolong service life.
At room temperature, the main factor that influences the autoclaving effect is sterilization pressure and dwell time.Along with dwell time of increasing of sterilization pressure can suitably shorten, promptly desire to reach same sterilization effect, in the certain pressure scope, can adopt the short dwell time of elevated pressures, also can adopt the longer dwell time of lower pressure.Undoubtedly, the former sterilizing efficiency height, but equipment is required high; Latter's sterilizing efficiency is low, but requires lower to equipment.Fig. 1 is the autoclaving pressure and the sterilization effect relation curve of dwell time fruit juice when certain.Fig. 2 is the autoclaving dwell time and the sterilization effect relation curve of sterilization pressure fruit juice when certain.As can be known from Fig. 1, from about 100MPa, along with increasing of processing pressure, the microbe quantity in two kinds of fruit juice sharply reduces from every milliliter about 800 and 4000; When processing pressure reached 300～400MPa, the microorganism number average in two kinds of fruit juice had leveled off to zero.As shown in Figure 2, when processing pressure is 500MPa, pressurize 10 minutes, in the fruit juice remaining bacterium number reached extremely low-level (about 10/ml), but pressurize is in the time of 30 minutes, remaining bacterium number just approaches zero; When processing pressure was brought up to 700MPa, the dwell time was then very remarkable to sterilization effect, and when about 2 minutes of dwell time, remaining bacterium number has approached zero.In addition, as previously mentioned, under certain autoclaving condition, the acid-base value of food directly influences sterilization effect.That is, reach same sterilization effect, the required sterilization pressure of the peracidity food that pH value is low is lower, the dwell time is shorter; PH value high in, low acidity food then needs elevated pressures and longer dwell time.In general, under technology of the present invention, appointed condition, under the pressure of 〉=300MPa, the peracidity food dwell time selected 1 second to 10 minutes can reach commercial sterilization requirement, in, low acidity food needs then that pressurize just can reach effect same in 5～20 minutes under 400～70OMPa pressure.
The high-pressure bottle structure of mesohigh bactericidal unit of the present invention as shown in Figure 3, Figure 4.In Fig. 3, the cylindrical shell 8 of container is the individual layer cylindrical structure.The front end of cylindrical shell and front plate 3,6 support plates 5 usefulness numbers combine as a whole to bolt 4, nut 7.Front plate 6 is fixed on the base plate 1.Preceding seal plug 15 is fixing through front plate 3 and cushion block 2.Cylinder back-end is fixed with rear plate 10,11 bolt 9, nut 12 with several.Back seal plug 14 is fixing by rear plate 11.Sealed with potted component between front and back seal plug and cylindrical shell.Cylinder back-end is normally closed.Hole 13 is the path of pressure medium discrepancy cylindrical shell.Barrel front end often opens and closes, and front plate 3 has circular hole, is the material to be machined gateway.In Fig. 4, the cylindrical shell of high-pressure bottle and the structure of supporting part all with Fig. 3 in identical.Cylindrical shell 8 usefulness high strength steels are made.The front and back seal plug 15 of cylindrical shell and 14 and the sealing of cylinder inboard wall adopt the version of as shown in Figure 5 delta-ring 17, leather mat 18 and O type circle 19 combination sealings, be provided with baffle plate 20 in the end of seal plug.Sealing is simple in structure, good sealing effect.In practicality,, also can save leather mat 18 according to operating position.As shown in Figure 6, the bin 16 that cross section is an annular is housed in the cylindrical shell 8.When food is carried out HIGH PRESSURE TREATMENT, at first unload lower cushion block 2 and preceding seal plug 15 and potted component, from the perforate of front plate 3, pull out bin 16, the packaged food of in bin, packing into.Then bin and food are pushed in the cylindrical shell, install potted component, seal plug and cushion block, come the pressure medium of self-boosting system from hole 13 inputs of cylinder back-end.When treating that pressure reaches desirable value, the pressurize certain hour is promptly finished the autoclaving of food is handled.Afterwards, the booster system release, pressure medium 13 is back to booster system from the hole.Open cylindrical shell by the aforementioned operation process then, take out on the bin through autoclaved packaged food.For ease of holding food, bin 16 also can be made basket type or bathtub construction.In addition, in the practicality, the cylindrical shell of high-pressure bottle is handled through self-reinforcing after can making more than or equal to 1.2 high strength steel with wall ratio (ratio of promptly outer internal diameter) again.Like this, not only can reduce container wall thickness, and its compressive resistance and service life are increased substantially.
Below be embodiments of the invention.
Embodiment 4: the super-pressure pump in the used high-pressure treatment apparatus is the reciprocating type extra high pressure charging machine of horizontal double plunger, and its output pressure is 981～1000MPa.High-pressure bottle adopts Fig. 3 and structure shown in Figure 4, and the cylindrical shell wall ratio is 2 PCrNi
3Handle through self-reinforcing again after the MoV steel is made, its dischargeable capacity is 66.7 liters.The material of handling is " red excellent No. two " watermelon pulp juice, and its pH value is 5.7.Institute's adopting process is: get flesh after material is cleaned up and remove seed; To go watermelon pulp juice behind the seed to pack in the semi-rigid polyester bottles, packing density be more than 95%; In the vacuum degassing sealer, after vacuum outgas is handled bottleneck is sealed in carrying out under the vacuum 0.05MPa condition; The packing materials of good seal are packed into after with the overcoat involution in the high-pressure bottle; Start booster system, at room temperature with pressurising in the high-pressure bottle to 550MPa (its pressure medium is a di-n-octyl sebacate) and pressurize release after 15 minutes; Purged and packed bottle outer surface and air dry behind the removal overcoat.
Embodiment 2: device therefor is identical with embodiment 1 with material handling, and difference from Example 1 is in the used technology, and polyester bottles does not install overcoat outward additional directly packs into and handle in the high-pressure bottle.
Embodiment 3: device therefor is identical with embodiment 2 with material handling.Used technology difference from Example 2 is that the vacuum that the degassing is handled is 0.02MPa, and processing pressure is 700MPa, 1 second of dwell time.
Embodiment 4: the vacuum of removing degassing processing is 0.08MPa, and processing pressure is 500MPa, and the dwell time is outside 30 minutes, and other are all identical with embodiment 2.
Embodiment 5: the material of handling is vegetables cauliflower and green pepper.The pH value of the last balance of material is greater than 4.3.Giving before device therefor and the HIGH PRESSURE TREATMENT handled substantially the same manner as Example 1.Processing pressure is respectively 300,400,500,600MPa, 10 minutes dwell times.
Embodiment 6: material handling is a cauliflower.Except that processing pressure is that 300MPa, dwell time are 30 minutes, other are identical with embodiment 5.
Embodiment 7: material handling is a green pepper, and except that processing pressure is that 500MPa, dwell time are 5 minutes, other are identical with embodiment 5.
The sterilization of part embodiment of the present invention that table 1～table 6 is classified as and fresh-keeping effect detect data.By the data of table 1, table 2 as can be known, to the such low acidity food of watermelon pulp juice, its sterilization pressure and dwell time all have relatively high expectations (generally need 550MPa, more than 5 minutes).Handled in 5～15 minutes through the 550MPa pressurize, its microorganism detection index all reaches national food hygienic standard.After this PROCESS FOR TREATMENT, peroxidase vigor 42% (the seeing Table 3) that descended in the watermelon pulp juice, this prevents food spoilage for the continuous action of control pectase etc., keeps the natural flavor of food to have great significance for a long time.Through the actual examination of storage test, the packing term of validity of the watermelon pulp juice after this PROCESS FOR TREATMENT reached more than 9 months.About nutrition and harmful element content, show that through actual detected after this PROCESS FOR TREATMENT, the component of watermelon pulp juice does not almost change.Especially heat-sensitive substance such as Vc is all destroyed, and this watermelon pulp juice still has whole nutritive values of raw material pulp juice as can be known.And the content of harmful element is compared with raw material almost not to be increased, and meets national food hygienic standard (seeing Table 5) fully.Table 1 is the actual detected value that cauliflower and green pepper are handled back microbial survival amount among the part embodiment under different pressures.By data in the table as can be known, for green pepper, the so middle acid food of cauliflower, sterilization pressure and dwell time require lower, handle all can reach the national food hygienic standard requirement under the pressure more than the 300MPa.But for improving the level of deactivation of enzyme in the vegetables, the packing term of validity of product is prolonged, then need to select its processing pressure higher.Table 6 is green pepper, cauliflower 500MPa, pressurize in 10 minutes is handled after actual packing term of validity result of the test of storing.By data in the table as can be known, when its packing term of validity reached 6 months, the microbial survival number still kept very low value, promptly still is in commercially aseptic state, meets national food hygienic standard fully.
The present invention is not only applicable to the sterilization fresh of vegetables, fruit, can be used for the fresh-keeping and sterilization treatment of other food, beverage and pharmaceuticals etc. yet.
Table 1 processing pressure is to the influence of microbial survival number in the watermelon pulp juice
| Interventions Requested | Processing pressure MPa (pressurize 15 minutes) | Standard-required | ||||
| 200 | 300 | 400 | 500 | 550 | ||
| Total number of bacteria/ml | How can not count | 3×10 4 | 3×10 4 | 3 | ＜1 | ≤100 |
| - | 1.6×10 5 | 3×10 4 | 1.7×10 4 | 1 | ||
| Coliform/100m | 460 | 230 | ＜3 | ＜3 | ＜3 | ≤6 |
| - | 230 | 230 | ＜3 | ＜3 | ||
| Pathogenic bacteria | Do not detect | Do not detect | Do not detect | Do not detect | Do not detect | Must not detect |
Table 2 dwell time is to microbial survival number influence in the watermelon pulp juice
| Interventions Requested | Dwell time min (processing pressure 550MPa) | Standard-required | |
| 5 | 15 | ||
| Total number of bacteria/ml | ＜1 | 1 | ≤100 |
| Coliform/100ml | ＜3 | ＜3 | ≤6 |
| Pathogenic bacteria | Do not detect | Do not detect | Must not detect |
The vigor of enzyme before and after the table 3 watermelon pulp juice HIGH PRESSURE TREATMENT
| Interventions Requested | The sample state | Vigor decline percentage | |
| Before the pressurization | The pressurization back (room temperature, 550MPa, 10min) | ％ | |
| The vigor of peroxidase | 8.75 | 5.09 | 42 |
Table 4 processing pressure is to the influence of microbial survival number in cauliflower, the green pepper
| Sample | Interventions Requested | Processing pressure MPa (pressurize 10 minutes) | Standard-required | |||
| 300 | 400 | 5O0 | 600 | |||
| Cauliflower | Total number of bacteria/ | 8 | 1 | 1 | ＜1 | ≤100 |
| 5 | 1 | ＜1 | 1 | |||
| Coliform/100ml | ＜3 | ＜3 | ＜3 | ＜3 | ≤6 | |
| ＜3 | ＜3 | ＜3 | ＜3 | |||
| Green pepper | Total number of bacteria/ | 7 | 8 | 6 | 3 | ≤100 |
| 22 | 4 | 3 | 2 | |||
| Coliform/100ml | ＜3 | ＜3 | ＜3 | ＜3 | ≤6 | |
| ＜3 | ＜3 | ＜3 | ＜3 | |||
The component of table 5 watermelon pulp juice
| Component | The sample state | |
| Before the pressurization | After the pressurization | |
| Moisture % | 94.2 | 94.4 |
| Protein % | 1.O2 | 1.10 |
| Total reducing sugar % | 4.0 | 4.1 |
| Cellulose % | 0.20 | 0.25 |
| Amino acid mg/100g | 0.13 | 0.12 |
| Carrotene mg/100g | 0.18 | 0.18 |
| V B2 mg/100g | 0.02 | 0.02 |
| V C mg/100g | 2.55 | 2.50 |
| Calcium mg/100g | 6.2 | 6.2 |
| Phosphorus mg/100g | 9.65 | 9.60 |
| Potassium mg/100g | 120 | 120 |
| Sodium mg/100g | 1.91 | 1.90 |
| Magnesium mg/100g | 8.0 | 8.1 |
| Plumbous mg/kg | 0.02 | 0.02 |
| Arsenic mg/kg | 0.17 | 0.16 |
| Copper mg/kg | 0.26 | 0.28 |
Table 6 vegetables packing term of validity result of the test
| Kind check examination PROJECT TIME (moon) | Cauliflower | Green pepper | ||
| Total number of bacteria/ml | Coliform/100ml | Total number of bacteria/ml | Coliform/ | |
| 2 | ＜1 | ＜3 | 1 | ＜3 |
| 4 | 4 | ＜3 | 1 | ＜3 |
| 6 | 1 | ＜3 | 2 | 3 |
Claims (9)
1, a kind of pressure sterilizing of food method, it is to place high-pressure bottle to reach the sterilization purpose behind pressurize certain hour under the static pressure food, it is characterized in that:
A. the material to be processed that cleans up is packed into and carry out in the flexible packaging container after vacuum outgas is handled vessel port being sealed;
B. the flexible package material of good seal is packed in the high-pressure bottle, in the high-pressure bottle of perhaps packing materials of good seal being packed into after with the flexible jacket involution;
C. at room temperature with the pressure that fills in the high-pressure bottle with 〉=300MPa, its pressure medium is a di-n-octyl sebacate;
D. removal pressure after keep-uping pressure 1 second to 30 minutes;
E. taking out packing materials cleans also dry.
2, method according to claim 1 is characterized in that the vacuum that vacuum outgas is handled is 0.02～0.08MPa.
3, method according to claim 1 is characterized in that institute's pressurising power is 400～700MPa in the high-pressure bottle, and the dwell time is 5～20 fens kinds.
4, a kind of autoclaving treating apparatus that is used for the described method of claim 1 mainly is made up of booster system and high-pressure bottle two parts, it is characterized in that: booster system is made up of the reciprocating type extra high pressure charging machine of double plunger, combination valve and pressure duct; High-pressure bottle is the individual layer tubular construction, and with seal plug and potted component sealing, the front end of cylindrical shell (8) connects with front plate (3,6) and support plate (5) with bolt respectively at the two ends of cylindrical shell, and forward end seal plug (15) is fixing by cushion block (2) and front plate (3); The rear end of cylindrical shell and rear plate (10,11) combine as a whole with bolt, and back-end sealing plug (14) is fixing by rear plate (11), which is provided with pressure medium and advances round (13); The high-pressure medium of being carried by booster system advances the cylindrical shell 8 that round enters high-pressure bottle on the seal plug 14 of back, to realize the autoclaving processing to material in the container.
5, device according to claim 4 is characterized in that cylindrical shell handles through self-reinforcing, and the wall ratio of cylindrical shell is more than or equal to 1.2.
6, according to claim 4 or 5 described devices, it is characterized in that the potted component of cylindrical shell two ends is combined by delta-ring (17) and O type circle (19), delta-ring is done with steel or copper.
7, according to claim 4 or 5 described devices, it is characterized in that the potted component of cylindrical shell two ends is combined by delta-ring (17), leather mat (18) and O type circle (19), delta-ring is done with steel or copper.
8, according to claim 4 or 5 described devices, it is characterized in that being equipped with in the cylindrical shell bin that is used to hold material to be processed.
9, device according to claim 8, the structure that it is characterized in that bin are any in basketry shape, tubular or three kinds of shapes of flute profile.
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| CN96101183A CN1049104C (en) | 1996-02-16 | 1996-02-16 | Method and apparatus for pressure sterilizing of food |
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| CN96101183A CN1049104C (en) | 1996-02-16 | 1996-02-16 | Method and apparatus for pressure sterilizing of food |
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| CN1133693A CN1133693A (en) | 1996-10-23 |
| CN1049104C true CN1049104C (en) | 2000-02-09 |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6696019B2 (en) * | 1998-06-15 | 2004-02-24 | Bbi Bioseq, Inc. | Rapid cryobaric sterilization and vaccine preparation |
| MY154025A (en) * | 2007-08-10 | 2015-04-30 | Toyo Seikan Group Holdings Ltd | Method for sterilizing a liquid food filled in a pouch |
| CN102349570A (en) * | 2011-09-19 | 2012-02-15 | 华南理工大学 | Preparation method of sapindaceae plant canned pulp |
| CN102742825B (en) * | 2012-07-18 | 2013-07-17 | 福建省农业科学院农业工程技术研究所 | Method for processing ready-to-eat leisure food by use of pleurotus eryngii head |
| CN103653172A (en) * | 2013-10-11 | 2014-03-26 | 邓路平 | Ultrahigh pressure food processing method |
| CN103907995A (en) * | 2014-04-17 | 2014-07-09 | 中国农业大学 | Ultra-high temperature and ultra-high pressure instant sterilization method of foods |
| CN104757690A (en) * | 2015-03-25 | 2015-07-08 | 四川新荷花中药饮片股份有限公司 | Sterilization and preservation method and industrial production method of wolfberry juice |
| CN104938883A (en) * | 2015-07-02 | 2015-09-30 | 岭南师范学院 | Method for sterilizing liquid food by use of pulse ultrahigh pressure and synergic measures |
| CN105558756A (en) * | 2015-12-30 | 2016-05-11 | 天津华泰森淼生物工程技术股份有限公司 | Household super-high pressure food processing device |
| CN107668757B (en) * | 2017-09-21 | 2019-09-24 | 任运（北京）科技有限公司 | Super high pressure food processor |
| CN109892510A (en) * | 2017-12-11 | 2019-06-18 | 香港生产力促进局 | A kind of high pressure food bactericidal unit |
| WO2020186431A1 (en) * | 2019-03-19 | 2020-09-24 | 达璞股份有限公司 | Sealing plug assembly |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0588010A1 (en) * | 1992-07-21 | 1994-03-23 | Tetra Laval Holdings & Finance SA | A method of preparing and packing liquid food with extended shelf life using high pressure |
| EP0623353A1 (en) * | 1993-05-07 | 1994-11-09 | Framatome | Apparatus for high pressure sterilization of products |
| EP0692260A1 (en) * | 1994-07-12 | 1996-01-17 | Gec Alsthom Acb | Device for high pressure treatment of products in flexible packages |
-
1996
- 1996-02-16 CN CN96101183A patent/CN1049104C/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0588010A1 (en) * | 1992-07-21 | 1994-03-23 | Tetra Laval Holdings & Finance SA | A method of preparing and packing liquid food with extended shelf life using high pressure |
| EP0623353A1 (en) * | 1993-05-07 | 1994-11-09 | Framatome | Apparatus for high pressure sterilization of products |
| EP0692260A1 (en) * | 1994-07-12 | 1996-01-17 | Gec Alsthom Acb | Device for high pressure treatment of products in flexible packages |
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| CN1133693A (en) | 1996-10-23 |
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