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High Density Polyethylene Tanks combined with wood staves during red wine ageing

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Resumo:The study involves the evolution of wine in four high density polyethylene (HDPE) tanks and one in a stainless-steel tank used as the control one. The HDPE tanks have three different types of permeability: low, medium and high permeability to oxygen. Inside of these containers were placed French wood (Quercus petraea) staves respectively in the low, medium and high permeable tanks, while the fourth medium permeable tank presents no staves in it. These particular tanks, which are permeable to oxygen plus the addition of wooden staves are used to mimic the wine ageing in wood barrels. The tanks were compared to a stainless-steel tank to confront the evolution of the phenolic structure and colour of wine during the month of ageing. The wine under test was produced from grapes harvested in 2020 and, after the vinification process, the treatment started in March 2021. During the experiment, wine analyses were conducted on the following parameters: colour, pigments and phenolic compounds (flavonols, flavanols, anthocyanins) by means of a spectrophotometer. Periodic analyses were also conducted on SO₂, volatile acidity and pH values. Wines in the high-density polyethylene tanks with wood presence showed a better evolution in phenolic composition compared to the stainless-steel tanks. Therefore, differences between the HDPE were observed depending on their permeability. Supposedly high-density polyethylene may be a valid alternative to the use of wood barrels which allows a good ageing development, reducing maintenance costs and also environmental impact. Ageing wine in HDPE tanks could ideally become a complementary practice to barrel ageing, thus limiting the use of this raw material.
Autores principais:Clap, Giacomo
Assunto:wine ageing oxygen high density polyethylene tank oak wood vinho envelhecimento oxigénio tanque em polietileno de alta densidade madeira de carvalho
Ano:2022
País:Portugal
Tipo de documento:dissertação de mestrado
Tipo de acesso:acesso restrito
Instituição associada:Universidade de Lisboa
Idioma:inglês
Origem:Repositório da Universidade de Lisboa

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