CN1097024A - The draught beer new fresh keeping technique - Google Patents

Abstract

A kind of draught beer new fresh keeping technique, its technical process is: beer storage wine liquid filters through diatomite filter, bucket formula membrane filtration microfroc filter earlier, then by filling machine bottling and vanning, at last by cobalt ⁶⁰It is fresh-keeping that radioactive source carries out sterilization by irradiation.For preventing bright beer, can before can after the filtration of bucket formula membrane filtration microfroc filter, increase by one sterile filtration again at the process mesometamorphism of waiting for irradiation.Adopt the method for the invention, can reduce cost of investment, increase bright beer freshness date.

Description

The draught beer new fresh keeping technique

The present invention relates to the beer refreshing technology, relate in particular to the preservation technique of unpasteurized beer.

Draught beer claims draft beer again, also has person to be bright beer, because it has the advantage that mouthfeel is good, be of high nutritive value, therefore is subjected to generally liking of people.But owing to the draught beer freshness preserving equipment costs an arm and a leg, and fresh keeping time is short, so the production and consumption of draught beer is subjected to bigger restriction.The bottled draught beer of external production all adopts and purifies factory building (standard is 50,000 grades to 100,000 grades), ultra-clean sterile filtration and sterile filling technology.Though the cost in this art production process is lower, investment cost is huge.Each brew-house's equipment of China is more outmoded comparatively speaking, if will build the purification factory building, import sterile filtration machine and aseptic filler are produced bottled draught beer, and investment cost is difficult to bear.Following flow process is generally all adopted in present domestic draught beer production and sales: beer storage wine liquid → diatomite filter → bucket formula membrane filtration microfroc filter → bright beer tank → can conveying → Beer vender.In above-mentioned flow process because filter plant is difficult to the whole filterings of bacterium in the bright beer, so the bottled bright beer of producing through this flow process under temperature condition more than 30 ℃, its preservation period had only about 1 day.Even bright beer is kept in the Beer vender with freezing plant (0～4 ℃), its preservation period also has only 10～15 days.

It is low to the purpose of this invention is to provide a kind of cost of investment, can increase the draught beer new fresh keeping technique of freshness date.

The object of the present invention is achieved like this: with cobalt ⁶⁰Be source of radiation, after filtering, and carry out sterilization by irradiation through the bright beer of finished product of filling machine bottling through diatomite filter, a bucket formula membrane filtration microfroc filter.

For increasing the freshness date of the bright beer after diatomite filter, bucket formula membrane filtration microfroc filter filter,, after filtering, also carry out sterile filtration with diatomite filter, bucket formula membrane filtration microfroc filter so that there is time enough to wait for irradiation.And then with filling machine bright beer tinning is bottled, carry out irradiation at last.

Owing to adopt cobalt in the method for the invention ⁶⁰Canned and bottled bright beer is carried out irradiation, therefore have following advantage: 1. need not in process of production to purify factory building and aseptic canning machine, in sales process, need not bright beer Beer vender, thereby can reduce cost greatly; 2. the bright beer behind irradiation, sterilization is thorough, preservation period can increase by ten several times to tens times; 3. keep the original local flavor and the nutritive value of bright beer, free from environmental pollution, nothing is harmful, toxic substance is residual.

Fig. 1 is contained in the synoptic diagram that the interior bottled and canned bright beer of case carries out irradiation.

Fig. 2 is the synoptic diagram after the increase sterile filtration step in the method for the invention.

The present invention is described in detail below in conjunction with drawings and Examples.

The present invention takes following technical process: beer storage wine liquid → diatomite filter filtration → bucket formula membrane filtration microfroc filter → bright beer tank → filling machine → bottling (or tinning) → vanning → cobalt ⁶⁰Irradiation.Beer storage wine liquid tentatively filters through diatomite filter earlier, through bucket formula membrane filtration microfroc filter yeast etc. is filtered again.After this beer liquid enters bright beer tank, in normal temperature, bottle or tinning through filling machine.Because in whole process flow, used factory building is not to purify factory building, and various processing treatment equipment, as long as a certain equipment has bacterium and just bacterium may be brought in the beer liquid.Particularly during can in the end,, bigger to bright beer freshness date influence if bacterium is brought in the bottle (or jar).Therefore if there be not last one irradiation technique, can only preserve about one day under the condition more than 30 ℃, and temperature will be above 30 ℃ most of the time busy season of beer through the bright beer that above-mentioned flow process is produced.But through cobalt ⁶⁰Behind the irradiation, the bacterium that bottle (or jar) can be adorned in the bright beer all kills, and this germicidal action is irreversible.Owing to after bright beer bottling, carry out sterilization by irradiation again, and bacterium all can be killed.Therefore adopt this technical process, the cleanliness factor of factory building and processing treatment equipment is required and can reduce greatly, thereby reduce investment and production cost.Use cobalt ⁶⁰Sterilization by irradiation is safe and reliable, and its sterilization effect is directly proportional with radiation dose, but radiation dose is excessive, can cause the loss of useful composition in the bright beer.Best radiation dose scope is between 400,000～1,000,000 rads.Only VITMAIN B1 and B6 are had small loss in this scope, other VITAMIN such as B1, B2, B12 and vitamin A family, C family, E family etc. and nutritive substance such as enzyme, amino acid, protein, carbohydrate, alcohol etc. all can be not destroyed.Bright beer irradiation synoptic diagram after the vanning, referring to Fig. 1, cobalt ⁶⁰Radioactive source (2) is positioned in the middle of the beer case (1), and the gamma-rays (3) that sends from radioactive source carries out irradiation to beer case.Concrete technical process is as follows: open cobalt storehouse inlet → with transfer roller with beer case be transported into cobalt storehouse stackings → sealing cobalt storehouse inlet → with the cobalt source from deep-well, hang out in the fixed position stop after laying (controlling automatically) → radiation and writing down dosage → reach demarcation dosage radiation → cobalt source reset → beer case is transported the cobalt storehouse.

To some apart from cobalt ⁶⁰The bright beer manufacturer of irradiation source (one day distance) relatively far away might be before being transported to the irradiation source location with bottled bright beer, and the bright beer of being produced goes bad.And it is this rotten exactly because bacterial count is more in the bright beer causes that freshness date shortens and cause.After above-mentioned technical process is handled, promptly filter, and by after the filling machine bottling technical process, the bacterial number in the bright beer to be still more through diatomite filter, the accurate machine of bucket formula membrane filtration, its freshness date had only about 1 day.Be necessary to increase again the sterile filtration step like this one, just take following technical process: beer storage wine liquid → diatomite filter filtration → bucket formula membrane filtration microfroc filter filtration → bright beer tank → sterile filtration machine filtration → bright beer tank → filling machine bottling or tinning → vanning → cobalt ⁶⁰Irradiation.After taking this technical process, be zero in sterile filtration machine thief hole sample examination total plate count.Owing to adopt to purify factory building, neither sterile filling, and pipeline and clean after empty bottle all may carry disease germs, therefore total plate count is 2～10 total number of bacterial colony/ml in the canned bright beer bottle that finishes.If do not increase this step of sterile filtration, total plate count will substantially exceed above-mentioned value in the bright beer bottle that can finishes.Its freshness date of bottled bright beer through repeatedly testing 2～10 total number of bacterial colony/ml is 4～7 days under 36 ℃ of temperature conditions.This freshness date can guarantee bottled bright beer is transported to cobalt from brew-house ⁶⁰Irradiation source.Idiographic flow is referring to Fig. 2, beer storage wine liquid at first passes through diatomite filter (4) and microfroc filter (5) twice pre-filtering, enters I bright beer tank (6), sends into sterile filtration machine (8) by food pump (10) again, after the sterile filtration machine filters, send into II bright beer tank (7).All connect successively between each equipment by pipeline (9).By beer filler bottling vanning, be transported to cobalt then ⁶⁰Irradiation source carries out irradiation.The sterile filtration step was divided into for two steps again, and the first step is with the whole eliminations of yeast, and this step is adopted relatively large E591F1PS or the E591F1QS polypropylene filter core in aperture.Second one with whole bacterium eliminations this step employing 0.65 micron pore size nylon or polysulfones filter core.In this two step, in order further to improve filtering efficient, prevent to block, decontamination chamber (11) is located at the top of filter cylinder, and filter core (12) adopts upside-down mounting, and sewage draining exit (13) is located at filter cylinder bottom mode, the fluid inlet of two filter cylinders adopts the tangential feeding mode simultaneously, can make liquid stream form vortex, impel thalline and impurity heavy, and filter core there is recoiling device with pressurized air its recoil to be cleaned when blocking to sewage draining exit.

Claims (5)

1, a kind of draught beer new fresh keeping technique, include following processing step, beer storage wine liquid is at first filtered by diatomite filter, is filtered by bucket formula membrane filtration microfroc filter again, the back be is characterized in that the draught beer after handling through above-mentioned steps is carried out cobalt by filling machine bottling (jar) and vanning again ⁶⁰Irradiation.

2, draught beer new fresh keeping technique according to claim 1 is characterized in that cobalt ⁶⁰Irradiation dose is 40～1,000,000 rads.

3,, it is characterized in that beer storage wine liquid after bucket formula membrane filtration microfroc filter filters, and then handles through sterile filtration again as draught beer new fresh keeping technique as described in the claim 2.

4, as draught beer new fresh keeping technique as described in the claim 3, it is characterized in that described sterile filtration is handled and be divided into for two steps, the first step adopts the relatively large polypropylene filter element filtering in aperture, and second step was adopted less relatively nylon or the polysulfones filter element filtering in aperture.

5,, it is characterized in that described filter cylinder adopts the decontamination chamber to be located at the mounting means of top, filter core upside-down mounting, tangential feeding and blocks the purging method that recoil is adopted in the back at filter core as draught beer new fresh keeping technique as described in claim 3 or 4.

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