title: Comparative study of protein stabilization in white wine using zirconia and bentonite: physicochemical and wine sensory analysis.
abstract: A semi-industrial application of the continuous stabilization of white wine protein using a column packed with zirconia was studied and compared to the traditional bentonite treatment using a Macabeu white wine. Physicochemical and wine sensory properties were evaluated using a rating system and triangle tests. Continuous protein stabilization was analyzed in three residence times, and the equivalent of 300 BV of wine was used for both treatments. Wine protein content was reduced by 21%, 40%, and 42% using the continuous process with residence times of 7.5, 15, and 30 min, respectively, and by 61.4% using the bentonite treatment. The wines obtained from the packed column were protein stable up to 25, 75, and 175 BV for residence times of 7.5, 15, and 30 min, respectively. The amount of polyphenol removed was less than 10%, and similar amounts were removed from the wine regardless of residence time, while 20.6% of polyphenol was removed using bentonite. The physicochemical and sensory properties of wine treated with bentonite were similar to those of wine treated with zirconia.
authors.affiliation: Unitat d'Enologia del CeRTA (Generalitat de Catalunya), Departament d'Enginyeria Química, Universitat Rovira i Virgili, Av. Països Catalans 26, 43007 Tarragona, Spain.
authors.forename: Fernando N
authors.initials: FN
authors.lastname: Salazar
authors.forename: Isabel
authors.initials: I
authors.lastname: Achaerandio
authors.forename: Mariela A
authors.initials: MA
authors.lastname: Labb
authors.forename: Carme
authors.initials: C
authors.lastname: Gell
authors.forename: Francisco
authors.initials: F
authors.lastname: Lpez
mesh_terms: D000327:Adsorption; D001546:Bentonite / Q000737:chemistry; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D005419:Flavonoids / Q000032:analysis; D005511:Food Handling / Q000379:methods; D010636:Phenols / Q000032:analysis; D010940:Plant Proteins / Q000032:analysis*; D059808:Polyphenols; D012677:Sensation; D014920:Wine / Q000032:analysis*; D015040:Zirconium / Q000737:chemistry
chemical_list: D005419:Flavonoids; D010636:Phenols; D010940:Plant Proteins; D059808:Polyphenols; D001546:Bentonite; D015040:Zirconium; C028541:zirconium oxide