protection during storage and transport
Preventing the ingress of extraneous organisms can be achieved by
minimising the head space in storage vats and transport tanks and ensuring
that sterilising filters are fitted to tank vents and in feed lines for top pressure
carbon dioxide. Filters from the BIO-X and TETPOR families should be used.
Low levels of sulphur dioxide are still used in some areas to microbiologically
stabilise the beer during storage and packaging. It also acts as an oxygen
scavenger. However, even at low levels, sulphur dioxide may result in flavour
taints. Filtration using PREPOR PP or PREPOR GP filter cartridges reduces the
risk of microbiological spoilage of the beer. This can lead to the significant
reduction, or elimination of sulphur dioxide. The high removal efficiency of the
cartridges provides removal of yeast and significant reduction of bacteria. For
high alcohol, very stable beers, these filters can provide a bright, yeast-free
product. For beers that are more susceptible to microbiological spoilage, the
filters can be used to remove most of the microbiological loading prior to
terminal microbiological stabilisation using microporous membrane or
pasteurisation.
Due to their microporous depth characteristics filters also improve the
filterability of the beer, protecting downstream membranes from premature
blockage due to low levels of colloidal content. In particular, PREPOR PP which
can be repeatedly hot water washed, steam sterilised and chemically cleaned
can be used as an alternative to sheet filters and provides an effective means
of standardising filterability.
- Can be used in conjunction with crossflow microfiltration to
remove yeast.
- Removal of yeast and reduction of bacteria prior to bulk
storage or tanker transportation.
- Filterability adjustment and standardisation of incoming beer
deliveries.
- Colloid reduction or removal.
- Yeast removal and reduction of bacteria prior to microporous
membrane filtration.
- Sterilisation of gases in contact with the beer.
Prepor GP BevPREPOR GP filter cartridges will significantly reduce numbers of yeast and spoilage organisms in beverage products to provide extremely cost effective microbiological stabilisation.
Prepor PP BevPREPOR PP filter cartridges will significantly reduce numbers of yeast and spoilage organisms from beverage products, to provide extremely cost effective microbial stabilisation.
