Wine Corks



Diverse filamentous moulds, (i.e. Penicillium sp, Mucor sp, Neurospora sp, Paecilomyces variotii y Phanerochaete) which belong to the microflora of cork have been recognized as the producers of TCA, which is the precursor of TCF.

The combination of the SO2 treatment with the irradiation treatment, are effective in reducing moulds, bacteria and yeasts present in cork, inhibiting the growth of micro-organisms, without any sign of physical or sensorial alteration.

If the cork has been manufactured under the correct process and is submitted to treatment as the final phase of its sanitization, e-beaming can increase the quality of a wine cork. Post-packaging treatment is the way to guarantee asepsis of limited duration and to assure that TCA does not appear.

OBJECTIVE

  • To eliminate the microbial elements in the corks to prevent the appearance of TCA.

  • ADVANTAGES

  • No alteration of the physical-chemical characteristics of the cork.
  • Good alternative to chemical treatments (leaves no residue).
  • High penetration capacity.
  • Fast process.
  • Unlimited lifespan.

  • The following list includes moulds, yeasts and bacteria that can be found in the cork tree and the can be eliminated by irradiation treatment.


    FILAMENTOUS MOULDS
    Penicillium Aspergillus Monilia sitophila
    P. frequentans A. niger Eurotium sp
    P. multicolor A. flavus Acremonium strictum
    P. roqueforti A. fumigatus Mucor
    P. expansum A. ochraceus M. plumbeus
    P. chrysogenum A. terreus M. hiemalis
    P. citrinum A. glaucus M. racemosus
    P. decumbens A. parasiticus Rhizopus arrhizus
    P. meleagrinum A. nidulans Paecilomyces variotii
    P. variable A. versicolor Neurospora sp
    P. viridicatum A. ruber Phoma sp
    P. citreoviride A. conicus Alternaria sp
    P. echinulatum Trichoderma Acremonium sp
    P. granulatum T. hamatum Cladosporium
    P. purpurescens T. longibrachiatum C. cladosporioides
    P. simplicissimun T. viride C. herbarum

    P. brevicompactum

    Armillaria mellea Aureobasidium pullulans
    YEASTS
    Candida sp
    Rhodotorula
    R. candida
    R. glutinis
    Saccharomyces
    S. cerevisiae
    S. italicus
    S. heterogenicus
    S. rouxii
    S. ludwigii
    Cryptococcus sp Trichosporon pullulans
    BACTERIAS
    Bacillus
    B. cereus
    B. firmus
    B. circulans
    B. sedentarius
    Corynebacterium sp
    Flavobacterium sp
    Kurthia sp
    Micrococcus
    M. luteus
    M. lylae
    Nocardia sp
    Pseudomonas sp
    Streptomyces sp
    Listeria sp