maximising the packaged microbiological shelf life
Terminal microbiological stabilisation using membrane microfiltration
cartridge filters is carried out immediately prior to packaging. Unlike heat or
chemical stabilisation, properly selected microfiltration will not impair the
organoleptic qualities of the beer.
Membrane retention ratings of 0.65 μm or 0.45 μm are sufficient to remove common
beer spoilage organisms. For canned and bottled beer, 0.65 μm should provide the
desired stability. However 0.4 μm is increasingly being chosen by a greater number
of brewers as it has the ability to remove a wider range of microorganisms,
including extraneous non-spoilage species that may be present. The BEVPOR range of
polyethersulphone (PES) microfiltration membrane cartridges is ideal for this
application. The range also includes 0.8 μm or 1.2 μm pore sizes for instances where
yeast content is the only concern, for example in keg beers that only require a shelf
life of weeks.
All components of the products, especially the PES membrane, have been designed to
ensure that their effect on characteristics such as colour, foam retention and taste
are minimal, avoiding the need for flushing the filter prior to use that some polymers
such as nylon or cellulose acetate may require. There are also a number of
constructional options to suit a wide range of operational requirements, beer
qualities and process conditions.
- Choice of constructional options to cater for various
operational requirements and beer qualities.
- Range of pore sizes to remove yeast and common spoilage
organisms.
- Minimal adsorption of beer components ensures that
desirable characteristics are not affected.
- High loading asymmetrical pore structure with integral
prefilter options to maximise service life.
- Wide chemical resistance enables chemical and enzymatic
regeneration to extend service life.
- Repeatedly testable enabling easy monitoring for quality
assurance and HACCP records.
Bevpor PHMinimising the cost of microbiological stabilisation per unit volume whilst maintaining quality and product characteristics is a key requirement withi
Bevpor PSMinimising the cost of microbiological stabilisation per unit volume whilst maintaining quality and product characteristics is a key requirement withi
