Add:C4 Building of Scientific & Technological Enterprise Accelerator, 11# Kaiyuan Avenue, Science Town of Luogang Development Zone, Guangzhou, China
The development of beverage industry in China is very fast, drinks variety also gradually from the past simple carbonated drinks to mineral water, fruit juice, fruit and vegetable juice beverages and functional beverages;Filling way too well from the cold filling the hot filling, medium temperature filling and aseptic cold filling, etc;Packaging form from a single glass bottles to now also cans, PET bottles and so on.According to different products and different forms of packaging, sterilization is also key for packaging bottle caps, in this paper, the current use of a variety of beverage bottle sterilization method is discussed.
Ultraviolet radiation sterilization
Microbial after uv irradiation, its protein and nucleic acid absorbed the ultraviolet spectrum energy, will lead to protein denaturation, death caused by microorganisms.
Beverage filling equipment, lose cover machine for capping machine or screw-top bottle caps.Or conveyor belt in the upper portion of the lost machine surge bin ultraviolet germicidal lamp installed, the top of the bottle cap in the process of conveying accept ultraviolet light, ultraviolet light to place can achieve better sterilization effect.Due to the caps pervious to light quality is poor, cannot penetrate cap exposure to the sun's ultraviolet rays to the other side of the cap.As a result, the cap can only achieve some sterilization, and the surface of the sterilization is random.To a targeted surface sterilization of bottle caps, in capping machine or twist the cap machine cap glide path to install uv germicidal lamp, through the bottle cap has been organized in the same direction, ultraviolet irradiation side is cap and beverage side of contact, effectively improve the sterilization effect.
Ultraviolet radiation sterilization equipment is simple, do not need to form a complete set of equipment, low cost, convenient operation and management, is widely used.Due to the structure characteristics of the slide and uv features of killing microorganisms, ultraviolet radiation sterilization ways generally fit in the following categories used in the beverage filling the cap:
Carbonated soft drinks containing CO2, acidic, can inhibit the growth of microorganisms, thus carbonated beverage bottle caps
With ultraviolet sterilization which can meet the demand.This method in the production, the batch packaging new cap into losing surge bin cover machine, bottle cap in losing machine storage bin or on the conveyor belt to accept ultraviolet irradiation sterilization;Can in turn set up on the cover under the machine cover slide ultraviolet germicidal lamp, let the inner surface of the bottle cap accept ultraviolet irradiation sterilization, sterilization after twist machine shipped directly.
2.mineral water drinks
State of mineral water production made more strict rules, including total number of colonies of mineral water, mold count and e. coli were strictly limited to zero.Whether through filtration sterilization processing of mineral water, the total number of bacteria, mould count and e. coli number must be in accordance with national standards.Due to the only mineral water containing inorganic salt, excluding microbial nutrition, lack of nutrients for microbial production development, thus can also be used ultraviolet sterilization of the lid.
3.high temperature filling tea drink, fruit juice drinks
Tea drinks and fruit drinks there are all kinds of microorganisms (bacteria, fungi and yeast, etc.), beverage sterilization is to kill these organisms.The current commonly used high temperature short time sterilization method, also called instantaneous sterilization method.
High temperature filling is made after the instantaneous sterilization drink cooling a between 85 ℃ ~ 92 ℃ temperature range for filling, choose crystallization heat of hot filling bottles of beverage bottle, cap to choose 85 ℃ heat resistant cap and filling way USES the full bottle filling, after filling gland (or screw-top) increase bottle device: the bottle dumping 90 ° ~ 180 °, inside the bottle cap to make use of beverage own high temperature sterilization.So in the early period of the bottle cap can also be dealt with in an ultraviolet sterilization.
Hot water spray and sterilization
Pasteurization is one of the most traditional methods of food preservation.Microbial cells if heated to a certain temperature, intracellular physiological active substances, such as enzyme protein, nuclear proteins, DNA, etc.) will occur degeneration and passivation, and loss of activity of death.Kill microorganisms of heating temperature and time, according to the kinds of microorganism, cell physiology, cell concentration significantly different.To kill a specific bacteria, improve the sterilization temperature can shorten the heating time and lower temperature need to extend the heating time, temperature is too low, the bactericidal effect for some heat resistant strains is not.
Hot water spray blunt sterilization is to take advantage of nozzle cap more direction injection of hot water, at the same time of sterilization and remove the dust on the surface of the cap inside and outside.This method in the production, the cover and the cap according to the same direction within the cap channel, are placed at the bottom of the channel on the nozzle, the nozzle to rush forward cap multi-faceted hot water spray, is the temperature of the hot water sterilization temperature, the time is the sterilization time accept spray blunt.
Metal cover due to its high temperature resistance, impact of hot water temperature can exceed 85 ℃, gush rushed time can be as the hot water temperature increase and reduction;For plastic bottle caps, spray hot water temperature control at 85 ℃ in general.Need to spray bottle cap sterile air after hot water sterilization, prompting cap dry.
Hot water spray need to provide hot water sterilization and aseptic air, need to the corresponding equipment, drains heat and a small amount of water production, is used for the equipment in general.Hot water spray at high temperature sterilization can be used for filling of tea drinks and juice beverage bottle cap processing, can also be used for mineral water bottle sterilization.
Ozone has strong oxidation properties, it can destroy the virus RNA or DNA nucleic acid directly and kill them.Ozone can also damage the bacteria, mould fungi microbial cell membrane, inhibit its growth, and further seepage failure within the membrane organization, until the bacteria, mould fungi microbial death.Ozone dissolved in water, in a high humidity environment sterilization effect is very good, can also use ozone water bottle cap for sterilization.
The ozone water sterilization will be discussed later.The greater the concentration of ozone sterilization effect, the better, the ozone concentration is zero
4.0 mg/m3, sterilization time usually need 45 minutes to 1 hour.
In need of ozone sterilization, time is very long, for automation of beverage production line have a certain production capacity, if is to satisfy the sterilization effect and to make cap sterilization process is completed in sterilization equipment, sterilization equipment needs to be done is very large., in the process of actual production cap ozone sterilization is have a certain production capacity of beverage production line automation, placed in a larger sealed space a certain amount of cap and then on the cap's space filling a certain concentration of ozone and maintain for a period of time.Put the cap the amount needed to maintain production cap amount.Sterilization after the cap, the longer the storage time of contaminated the greater the risk, so the general storage time not more than a week.After sterilization of cap need isolation with the outside world, to lose machines need cap to cover machine.
At present, directly using ozone sterilization equipment more independent in small cabinet cap sterilization cabinet.This kind of cap sterilization cabinet sterilization interval space is little, small production capacity, production and automation.When using this kind of ozone sterilization cabinet, need artificial put sterilization of cap out sterilization cabinet in the transmission machine, easy to cause secondary pollution cap.Therefore, ozone sterilization is only suitable for the automatic production line, or to cap a sterilization requirements of small production line.
Sterilization water sterilization
Sterilization is unstable in water elements, they will break down on its own.Sterilization water sterilization is the advantage of this decomposition (oxidation) to oxidation of microorganisms on the surface of the object, so as to achieve sterilization purposes.
Common with strong oxidizing substances are: acetic acid peroxide, ozone, water and chlorine water, the instantaneous sterilization properties of ozone is better than that of chlorine.
At present, the beverage bottle sterilization and ozone sterilization water basic using peracetic acid water, the vast majority for oxygen ethanoic acid.Bactericidal concentration of water, the greater the need of sterilization time is also reduced.About 65 ℃, 2000 PPM of peracetic acid by 30 seconds to 60 seconds to sterilization, can make the cap to suit the requirements of commercial asepsis.Because of the sterilization of water sterilization time is short, the sterilization effect is good, is widely used in fruit and vegetable juice beverage bottles and sterilization.Use sterilization beverage bottle caps for water sterilization ways mainly include spraying and soaking.
Is to use multiple sets of nozzle, multiple directions of cap injection sterilization water bottle cap surface sterilization, cap accept injection time should ensure that microbes can be completely kill.
Specific means is: after Richard cover the cap into cap orbit in the same direction, on the track of lower part is equipped with multiple sets of shower nozzle, shower in each group can be from different angles to cap injection water sterilization, water jet sterilization sterilization to cap also push the cap along the tracks.
As using peracetic acid water sterilization, sterilization after water spray at the cap need to be sterile water flushing, to remove the lid, the residue of peracetic acid residue of below the standards;Sterile sterile air blow dry reoccupy after water washing bottle caps.
When using ozone water as water sterilization, because the product after the decomposition of ozone water is water and oxygen, there are no harmful residue, theoretically don't need to bottle caps again for processing, but the actual production process, because exports and screw cap machine bottle sterilization machine, distance very close, can't make the residual ozone decomposition completely, therefore, cap after ozone water disinfection also need to air dry after washing and sterile sterile water treatment.Due to the linearity injection water, sterile water spray sterilization can be used for mineral water bottle sterilization, can also be used in tea drinks and fruit juice drinks hot filling bottle sterilization.Hot filling the bottle filling, after filling screw cover bottle heating caps, internal sterilization processing.
Are your drink bottle completely soaked in water sterilization, all inside and outside surface of cap to accept sterilization water sterilization, soaking time should satisfy the requirement of the cap completely sterilization time.A kind of method is: in the same direction of the cap on the bottle on the shelf, caps on the link in the chain, the chain into the movement of the driving cap frame is equipped with antiseptic sterilization in the pool of water and make the cap completely soaked in water sterilization, soaking time should satisfy the requirement of the complete sterilization time.And spray blunt way of sterilization, sterilization of water after soaking cap also need sterile water spray cleaning and aseptic air spray, make the cap dry and sterile.
When sterile water sterilization method is adopted to form a complete set of sterilizing water, sterile water and sterile air to production and processing, peripheral equipment, supporting the cost is high, the cost is large, high management requirements, so the sterilization process commonly used in fruit juice beverage of aseptic cold filling.
The electrolyte of sterilization
Electrolysis is the use of inert electrode electricity in liquid, the anode oxidation reaction, cathodic reduction reaction.Current research abroad relevant personnel have used completely in addition to salt water with dilute solution of sodium chloride in electrochemical reaction, sterilization effect is good in anode area traditional sterilization disinfection liquid water.If the electrolytic principle directly to cap sterilization, can significantly reduce transportation and storage costs, save time and effort, safe and effective.
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