JPH04121141A - Sterilization of broiler - Google Patents

Abstract

PURPOSE:To obtain safe, good-quality chicken free from residual chlorine odor by spraying a high-concentration ozone water on a depilated slaughtered body to sterilize it in a short time and to make the preliminary chilling or washing prior to the following chilling process needless. CONSTITUTION:A slaughtered body 4 having been freed from blood and immersed in hot water is suspended on a hook 3 hung on a rail 1 and then depilated in a booth 5 by rotating a rubber finger 6, and the resulting body is sprinkled or sprayed with an ozone water via a shower nozzle 8 to effect sterilization, thus obtaining the objective chicken.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention mainly relates to a method for sterilizing broilers and other meat birds.

<Conventional technology> Conventionally, in the processing of broilers from exsanguination (slaughtering) to disassembly, etc., after exsanguination, the hair is removed by soaking in hot water at about 60°C, and during the main cooling process after hollowing and pre-cooling, hypochlorite is removed. They were sterilized by adding chloric acid sorter, and then sent to the next stage of work, such as dismantling and transporting them to refrigeration.

Another popular method was to bathe the carcass with ozone generated by electric discharge or ultraviolet irradiation rather than air.

<Problem to be solved by the invention> However, in reality, the number of bacteria adhering to or entering the hair roots of carcasses of broilers etc. is largely determined during the hair removal process, so the Sterilization using a chlorite sorter has the problem that a large amount of general bacteria and coliform bacteria remain, and the condition is almost the same as that of artificially contaminated water such as carcass washing wastewater.

In order to improve the bactericidal effect against these problems, the chlorine concentration of carcass disinfectant water is originally regulated to 200 ppm or less, but it is used at a high concentration of 400 ppm, leaving a residual chlorine odor. 9 carcinogens and other chlorine pollution problems. In addition, since chlorine acts by penetrating bacteria, it requires a certain reaction time, and water-cooled chillers sterilize with chlorine in cold water of around 4°C, which makes the chlorine inactive and reduces its sterilizing effect. There are other problems.

Furthermore, the carcass is cooled with water at a temperature of 56C or lower, which tightens the hair roots and body surface to prevent tripping (flow of water from the carcass, deterioration of taste, leakage of nutrients, etc.). However, prior to this, conventional water cooling chillers were heated at 15° in order to prevent the water from becoming contaminated and to increase the cooling effect.
It was necessary to pre-cool the carcass by soaking it in a pre-cooled chiller containing room-temperature water at room temperature C for about 20 minutes. This requires an extra step that is not necessarily necessary for the carcass, and has the disadvantage of increasing dripping.

Other attempts using the ozone bath mentioned above also had a low ozone concentration corresponding to the oxygen concentration in the air, and on the contrary, nitrogen oxides (NOx) were removed.
), there are large changes in fatty acids, etc., making it difficult to obtain safe, high-quality meat.

Means for Solving the Problems> The sterilization method of the present invention that solves the above-mentioned problems involves spraying highly concentrated ozonated water during the hair removal process in the process of dehairing a bird carcass and cooling it after hollowing it out. It is characterized by cleaning and sterilizing carcasses by spraying or spraying, and also by mixing and dissolving in water high-concentration ozone water or ozone electrically generated from high-concentration oxygen that has been adsorbed and separated from the air and concentrated. This includes the fact that it has been obtained.

Effect> In the carcass hair removal process, an ozone water bath is performed at the same time as the carcass skin elastically deforms and the hair roots expand and contract due to hair removal, and the ozone in the ozone water acts on the bacteria on the skin surface and inside the hair roots and instantly At this time, the ozonated water also cleans the surface of the layer and cools it to a certain degree, so there is no need to pre-cool and pre-clean before cooling in the next step.

<Example> Hereinafter, an example illustrating the method of the present invention will be described in detail. Figure 1 is a flowchart showing the process of treating broilers, etc. by the method of the present invention. (soaking for about 2 seconds) is performed in the same manner as in the past, followed by hair removal and ozone water showering at the same time.

The above-mentioned hair removal and ozone water shower equipment is installed along the conveyor of the carcass processing line, and as shown in FIG. 4, a booth 5 through which the moving carcass 4 passes, and a large number of flexible rubber tubes that protrude toward the carcass 4 within the booth 5. a rubber finger 6, a drive device 7 that rotates the rubber finger 6 to make it come into contact with the carcass 4, and a shower nozzle 8 that sprinkles or sprays ozone water onto the carcass 4 from above the rubber finger 6. It consists of

A plurality of rubber fingers 6 are arranged horizontally and vertically, and each rotates in reverse alternately, and each finger elastically contacts the entire surface of the carcass 4 to remove hair, and ozone from the shower nozzle 8 Water is used to clean the surface of the layer and sterilize it, including the pores, during hair removal.

Next, to explain the generation of the ozone water, first of all, in order to generate ozone, Japanese Patent Application Laid-open No. 58-81422, No. 5]
-160514, 59-160515, Utility Model Publication No. 1
The method and apparatus shown in Publication No. 101624 are used to stably set the flow rate, pressure, etc. of highly concentrated oxygen that adsorbs and separates air in the atmosphere, and adjusts the applied voltage or frequency. Ozone of the required ozone concentration (maximum ozone concentration of around 95% can be stably obtained) is obtained by this method. Next, ozone is mixed with water using the mixing/separating device described below to efficiently set the dissolved ozone concentration and obtain stable activated ozone water. This ozone water is then supplied to the shower nozzle 8.

To explain the apparatus for obtaining the ozonated water, the above-mentioned highly concentrated ozone is mixed with water and bubbles separated by the mixing/separating apparatus shown in FIG. 3, and used as safe ozonated water. The mixer 11 is formed by thread-joining a sleeve-shaped nozzle body 12 and a mixing sleeve 13 concentrically, and the outer periphery of the base end of the nozzle body 12 forms a thread-joint part 16 with the water supply pipe 14. The inner peripheral side has a swirling chamber 17 consisting of a space (hole) with a relatively large diameter.

A spiral body 18 having approximately the same diameter as the swirling chamber and forming a spiral of about 1 to 2 pitches is housed in the swirling chamber 17,
It is a mechanism that instantaneously converts the flow of water supplied from the water supply pipe 14 side at a pressure of, for example, 2 kg/ctt2 into a swirling flow. At the center of the front of the swirling chamber 17, a nozzle hole 19 of a certain length is formed which is successively reduced in diameter into a conical shape and forms a nozzle part 21, and the swirling flow of the water flows inside the nozzle hole 19. The flow is arranged into a straight, thin swirling flow, and becomes a thin, linear swirling flow.

The base end of the mixing sleeve 13 is screwed onto the outer periphery of the nozzle portion 21, and a first hole is provided on the outer periphery and side of the tip of the nozzle portion 21 to release the pressure of the swirling flow from the nozzle hole 19. The mixing chamber 22 is formed as a space surrounding the end of the nozzle part 21, and the rear peripheral wall of the first mixing chamber 22 is provided with a gas supply nozzle 23 from the ozone generator described above or a shaft of the nozzle body 12. The connection opening is made to intersect with the core (swirling flow) direction at an angle of 90° or less. Ozone is supplied from the nozzle 23 at a low pressure of about 0.5 to 9 cm2 or less, is sucked into the swirling flow passing through the first mixing chamber 22, and travels straight along with the swirling flow while being mixed with water. .

A rectifying hole 24 having a diameter slightly larger than the nozzle hole 19 is formed in a predetermined length in front of the first mixing chamber 22 in a tapered shape whose diameter is gradually reduced. The flow is adjusted to a linear swirl again and the mixing with ozone is further enhanced. Furthermore, a second mixing chamber 26 consisting of a hole having approximately the same diameter as the mixing chamber 22 is formed in front of the rectifying hole 24, and the outer periphery of the second mixing chamber 26 on the tip side is connected to the bubble separator 27 side. It is connected to the water supply pipe 29.

In the second mixing chamber 26, the on/on that was not completely mixed before leaving the rectifying hole 24 is mixed again while being involved in the swirling flow. The swirling flow formed in the mixer 11 as described above flows in the second mixing chamber and the water supply pipe 29 as a straight and streaky flow, and is concentrated in the center, so that the water supply pipe 29, etc. There is less resistance to the inner peripheral surface, reducing pressure loss and increasing flow rate. In addition, the water forms vortices on each cross section and gathers at the center, creating a swirling flow over a long range, improving the agitation and mixing of water and ozone.
The dissolved rate of ozone increases.

As mentioned above, if undissolved syngas exists in the ozone-dissolved water (ozone water), it poses a danger to humans and livestock, so a bubble separator 27 is installed to remove the ozone gas floating in the ozone water. used. That is, the bubble separator 27 has, for example, an inner diameter of 10011L and a height of 350xm.
It consists of a pressure-resistant coupling 31 consisting of front and rear tanks, and an air vent 32 above which communicates with the inside of the upper end of the coupling 31, and the water supply pipe 29 is connected to the peripheral wall of the coupling 31 at approximately the middle height position. It is open, and a water pipe 33 for sending out ozonated water is connected to the lower part of the peripheral wall on the opposite side.

A partition plate 34 is provided at approximately the center of the openings of the water supply pipe 29 and the water supply pipe 33 to partition the lower part of the coupling 31 into front and rear parts. Its height is approximately 273rds of the height of the coupling 31 so as to impede flow.

As a result, the supplied ozonated water rises above the partition plate 34, overflows it, and flows downward toward the water pipe 33 below.

The ozone gas bubbles floating in the ozone water float upward due to the specific gravity during the rising, rising and falling processes of the ozone water, are collected upward in the coupling 31, and are separated and captured as gas in the air vent 32. collected, air vent 3
2 is sent to an ozone treatment device (not shown) using activated carbon or the like through an exhaust joint 36 at the upper end.

A hole valve 38 of a certain weight is mounted on the inner bottom of the near vent 32 so as to close the opening of the exhaust hole 37 communicating with the coupling 31, and when the ozone gas stored in the upper part of the coupling 31 reaches a certain amount, It is structured to open automatically and introduce only gas into the air vent 32.

The ozonated water sent to the required locations from the water pipe 33 by the above-described mechanism has a soot dissolution rate of 90% or more based on the water temperature at the time, and also has NO, etc. for the shower nozzle 8 mentioned above. It is possible to supply extremely highly concentrated ozonated water that contains almost no ozone.

By performing hair removal and ozonated water cleaning at the same time as above,
Ozonated water reaches not only the surface of the carcass but also the inside of its hair roots (quills), and in the process of separating oxygen atoms, ozone acts on bacteria, instantaneously sterilizing them, as well as deodorizing and decolorizing them. These actions also act on the rubber fingers, which are always contaminated with germs and the like, and together with the washing action of water, they are always freshly cleaned.

After the above-mentioned hair removal and ozone shower are completed, the core is removed by a conventional method (built-in removal treatment) and self-sufficient by cooling with a cooling chiller (not shown) that circulates water at about 4°C.

After the above internal tightening is completed, the carcass should be washed with ozonated water again.
Although it is preferable to clean the appearance of the carcass and to sterilize it more safely, it is already sterilized and washed with ozonated water during the hair removal process, and the state of bacteria attached to the carcass is determined mostly by the state at the time of hair removal, so cooling is recommended. A subsequent ozonated water wash is not necessarily necessary.

Following the above processing, the carcass is either sent to the next process such as disassembly, refrigeration, and delivery, or it is either washed with ozonated water during the hair removal process as described above, or it is not washed with ozonated water as described above.

Table 1 shows the comparison of the number of general bacteria and the number of coliform bacteria after treatment with those washed with ozone water.

Table 1 <Effects of the Invention> According to the method of the present invention configured as described above, the sterilization effect is significantly improved compared to the method using conventional chlorine-based disinfectants, and the method uses high-concentration chlorine-based disinfectants. Since there is no need to use disinfectants, there is an advantage that carcinogens, residual chlorine odor, and other chlorine pollution do not occur.

In addition, unlike chlorine-based disinfectants, there is no need for a reaction time for sterilization, and the ozone in ozone water exerts its sterilizing effect within a short time during the hair removal process, so it is safe and has a high quality product without affecting the quality of the meat. You can get delicious poultry meat.

Furthermore, the carcass is pre-cleaned in an ozone water bath during the hair removal process.
Since it is pre-cooled, there is no need for water contamination of the cooling chiller or a water bath in the pre-cooling chiller to improve the cooling effect, which has the effect of preventing drips and shortening the treatment process.

In addition, since it is a highly concentrated ozone water cleaning method, it does not contain a large amount of NOx, so it is safe and does not have problems such as changes in fatty acids, unlike the ozone bath of a carcass using ozone obtained from the air by electric discharge or ultraviolet irradiation. Moreover, high quality poultry meat can be obtained.

[Brief explanation of drawings]

Figure 1 of the drawings is a flowchart showing the broiler carcass processing process using the method of the present invention, Figure 2 is a schematic explanatory diagram of the depilation and ozone water cleaning equipment used in the above process, and Figure 3 is a flowchart showing the process of processing broiler carcasses using the method of the present invention. FIG. 3 is a cross-sectional view including a partially enlarged view of the mixer and the bubble separator. 1: Rail 2. Cheno 4, Carcass 5, Booth

Claims (1)

[Scope of Claims] 1) A method for sterilizing broilers, etc., in which the carcass of a bird is dehaired, hollowed out, and then cooled, and the carcass is washed and sterilized by sprinkling or spraying highly concentrated ozonated water during the dehairing process. 2) Highly concentrated ozone water is obtained by mixing and dissolving in water ozone that is electrically generated from highly concentrated oxygen that has been adsorbed and separated from the air and concentrated. How to sterilize broilers, etc.