 IVES 9 IVES Conference Series 9 Use of membrane ultrafiltration technology to achieve protein stabilisation of white wine

Use of membrane ultrafiltration technology to achieve protein stabilisation of white wine

Abstract

AIM: Proteins in white wine can cause cloudiness or haze after bottling, which consumers may consider an indicator of poor quality. As a consequence, winemakers often use bentonite, a clay-based material that binds protein, to remove proteins and achieve protein stabilisation. However, removing bentonite from wine after treatment can result in a 3-10% loss of wine (1). Membrane filtration technology is used in wine production for many purposes and ultrafiltration (UF) offers an easily-translatable process for protein removal (1). UF treatment of wine can produce heat-stable permeate and protein-enriched retentate, which enables targeted protein degradation. Heating the retentate, with or without protease significantly improved the heat stability of recombined wine in pilot scale trials (2). This study evaluated strategies for achieving protein stabilisation using membrane filtration.

METHODS: Sauvignon blanc wine (unfined) was fractionated by UF in triplicate, the resulting retentate subjected to protease and heat (62℃, 10 min) treatment, and the treated retentate recombined with the permeate. Traditional bentonite fining was performed as a positive control. Chemical and sensory analyses were carried out to evaluate the efficacy of treatment.

RESULTS: Heating retentate with protease reduced the concentration of haze-forming proteins by 54% compared with heating alone 40%. Chemical analyses and quality scores for recombined wine showed no significant difference with bentonite-fined wines. Sensory analysis indicated that UF/heat-treatment increased the green apple aroma, alcohol heat and overall flavour intensity of the wines compared to bentonite fined wines, suggesting UF-treated wines retained flavour without imparting oxidative characters.

CONCLUSIONS

Ultrafiltration combined with heat and protease treatment can reduce bentonite use without significantly affecting sensory properties. While results are promising, it is not yet a viable alternative to bentonite fining.

DOI:

Publication date: September 7, 2021

Issue: Macrowine 2021

Type: Article

Authors

Yihe Sui

The University of Adelaide, School of Agriculture, Food and Wine; Australian Research Council Training Centre for Innovative Wine Production.,David, WOLLAN, VAF Memstar; Australian Research Council Training Centre for Innovative Wine Production – Jacqui, MCRAE, The University of Adelaide, School of Chemical Engineering and Advanced Materials – Richard, MUHLACK, The University of Adelaide, School of Agriculture, Food and Wine; Australian Research Council Training Centre for Innovative Wine Production – Peter, GODDEN, The Australian Wine Research Institute – Kerry, WILKINSON, The University of Adelaide, School of Agriculture, Food and Wine; Australian Research Council Training Centre for Innovative Wine Productin

Contact the author

Keywords

white wine heat stability, haze, ultrafiltration, wine protein, protease

Citation

Effect of the plant sink/source balance on the chemical content of red table grapes (Vitis vinifera L.).

PPhloem transport of assimilates provides the materials needed for the growth and development of reproductive structures, storage and developing organs, and has long been recognized as a major determinant in crop yield.

Applying artificial intelligence for improving grape yield estimation: A case study of wine and table grapes in South Africa

Accurate grape yield estimation is essential for effective vineyard management, crop planning, and resource allocation. Traditional methods often involve time-consuming and labour-intensive processes, which may introduce errors due to the large size and inherent spatial variability of the vineyard blocks.

Chemistry and analysis of key volatile compounds of wine and their precursors in grape

A relatively small number of the many volatile substances of wine, often present at trace
concentrations, are considered as key volatile compounds. These compounds often exist in grapes
under poorly odoriferous or non volatile forms as aroma precursors.

NEUROPROTECTIVE AND ANTI-INFLAMMATORY PROPERTIES OF HYDROXYTYROSOL: A PROMISING BIOACTIVE COMPONENT OF WINE

Hydroxytyrosol (HT) is a phenolic compound present in olives, virgin olive oil and wine. HT has attracted great scientific interest due to its biological activities which have been related with the ortho-dihydroxy conformation in the aromatic ring. In white and red wines, HT has been detected at concentrations ranging from 0.28 to 9.6 mg/L and its occurrence has been closely related with yeast metabolism of aromatic amino acids by Ehrlich pathway during alcoholic fermentation. One of the most promising properties of this compound is the neuroprotective activity against pathological mechanisms related with neurode-generative disorders including Alzheimer’s and Parkinson’s disease.

The chemical composition of disease resistant hybrid grape cultivars and its impact on wine quality: an exploratory enquiry into sustainable wines

Disease resistant hybrid grape cultivars are now allowed in a number of EU wine PDOs, and are also accepted in a number of countries outside the EU. There is increasing interest in diseases resistant hybrid grape cultivars (RHGCs) because they allow for the production of healthy, high quality grapes with limited use of pesticides and the associated environmental and public health