UV Disinfection in Brewing
How Does Ultraviolet Work?
Ultraviolet energy causes permanent inactivation of micro-organisms by disrupting DNA so that they are no longer able to maintain metabolism or reproduce. The maximum effectiveness occurs at between 240nm and 280nm, with the most effective wavelength typically at 254nm. The Sukrut UV Spektrotherm HP lamp produces this wavelength in abundance. All bacteria, spores, viruses and protozoa (including Cryptosporidium and Giardia oocysts) are permanently inactivated by UV.
The Role of UV in Brewing
Water is one of the raw ingredients that give each beer its distinctive taste. UV disinfection systems safeguard the water used in breweries from the risk of water-borne biological contamination. UV disinfects the water and is effective against all water-borne micro-organisms such as bacteria, yeasts, moulds and algae. Other applications for UV in the breweries include the treatment of caps and cans and the disinfection of air in packaging areas.
Why Do Leading Brewers Choose UV Treatment?
Brewers world-wide trust UV to protect their product from contamination and so enhance quality, stability
and shelf life.
- It is far superior to more traditional methods :-
- No beer spoilage organisms survive UV treatment
- UV is the most cost effective method of water disinfection
- UV has no effect on pH, colour, flavour or aroma
- UV has no detrimental effect on beer stability
- UV leaves no residue
- No hazardous or toxic chemicals are produced
- Permanent accurate treatment records are available
Corporation water supply if available should be free from micro-organisms. However, well water may be contaminated and corporation water can pick up infection in the plant. Indian laws require food and beverage water to be microbiologically pure.
- UV treatment of water stops all contamination at source
- UV treatment enables bottled water producers to guarantee the quality of the
product even when the source fluctuates *
- UV permits reuse of water to improve availability and plant profitability, without risking the quality of the product
- Bottle rinse, UV treated water is used to rinse out any cleaning fluids or plastic residues which could otherwise affect flavour
- Both disposable and recycled glass or plastic jetting (injection of water into bottle at capping) should be done with UV disinfected water
- Disinfection of headspace in water storage tanks
- Disinfection of air entering plants
- Disinfection of air supply to yeast preparation area
Selection of the appropriate UV model for each application should be decided in conjunction with a Sukrut UV specialist, who will also advise on the installation and dose.