Brewing equipment sterilization method2

Beer production water and sterilizing method has the following several ( 1) Sand bar ( Sand filter rods) Filtering is to use sand filter rod filter equipment, remove microorganisms and some organic impurities in water, dissolved salts, molecular state can't afford to filter impurities in water. ( 2) Chlorine disinfection as it is difficult because of the liquid chlorine used bleaching powder is often used instead of the factory. But the saccharification, yeast washing, training in the use of water, dilute beer, beer filter in the use of water cannot adopt this method in addition to bacteria. ( 3) Ozone sterilization using ozone sterilization require specialized ozone sterilization equipment, clean water after filtration, 0 for the amount of ozone. 1 ~ 1 g/m3 can achieve satisfactory result of sterilization. ( 4) Need special ultraviolet disinfection sterilization using uv ultraviolet sterilization equipment, in 200 ~ 300 nm wavelength ultraviolet disinfection has ability, maximum wavelength at 260 nm sterilization. Can be used for washing water, beer yeast dilution water sterilization. As is known to all, what the sterilization method in beer brewing, have important effects on beer fermentation. Sterilization methods commonly used at present, there are several of the following, thermal sterilization microorganisms has its suitable growth temperature, exceeds the maximum growth temperature range, it could cause death. Therefore, the heating in the sterilization and disinfection methods one of the most widely used and the method with better effect. All of the hose connection material and fixed tube before use must be after steam sterilization of 30 min. Advantages: steam with a broad spectrum, obtain convenient, non-toxic, non-corrosive, and has the good permeability. Disadvantages: steam is easy to form film, heating up slowly, consumes energy. Beer can by pasteurization, at 60 ℃ temperature for 20 minutes. But due to the heating time is long, so the product flavor, nutrition and colloid stability has a certain influence. Second, uv ultraviolet sterilization is very effective for water sterilization effect, the active depends on pH, temperature, are widely used in the preparation of sterile water system. Advantages: no residue and gas, low toxicity. Disadvantages: less permeable, sterilization effect depends on the turbidity of water, and no residual activity, easily lead to bacterial growth again. Three, high voltage sterilization kirin beer company developed a combined with instantaneous high voltage in beer, only kill bacteria pollution in beer, a new method of sterilization. Advantages: compared with thermal sterilization method, this method is less energy consumption, the quality of the beer will not be affected. Four, lye sterilization alkali [usually used caustic soda ( 氢氧化钠) ] can hydrolyze protein and nucleic acid, the microbial enzyme system and cellular structure is damaged, the death caused by bacteria. Production process, the sheet and wort cooler pipe must be every day with hot alkaline cycle sterilization; At the same time, used to breed tank, fermentation tank must use temperature 80 & ndash; Around 85 ℃, the mass fraction of 10% NaOH solution circulation. Advantage: the base class in addition to have antiseptic effect, still can go to the oil. At the same time, the more alkaline, its sterilization effect is better. Five antiseptic bactericidal effect of formaldehyde, formaldehyde is that it has a reduction, bacteriostatic or sterilization, can can combined with proteins amino and make the protein denaturation, thus destroying the bacteria in the cytoplasm. By NaOH solution to rinse tank and fermentation tank, rinse with clear water, also should use the mass fraction of 2% formaldehyde solution sealed 2 h, reoccupy clear water is rinsed with backup. Six, oxide sterilization oxidant can release release oxygen free oxygen or other compounds. Antioxidant effects on microbial protein structures, amino, hydroxyl or other chemical genes in causing the metabolic dysfunction and death. Yeast is added after each use, must be washed by water and hydrogen peroxide ( H2O2） Or bleach solution soak, next time before using, and then rinse with water. A: the earliest beer or grape brewing the next 13000 years ago: the preservation of the wine