Evaluation of selected parameters of mechanical and pneumatic press during grape pressing

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43510%2F19%3A43915859" target="_blank" >RIV/62156489:43510/19:43915859 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.22616/ERDev2019.18.N260" target="_blank" >http://dx.doi.org/10.22616/ERDev2019.18.N260</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.22616/ERDev2019.18.N260" target="_blank" >10.22616/ERDev2019.18.N260</a>

Result language

angličtina

Original language name

Evaluation of selected parameters of mechanical and pneumatic press during grape pressing

Original language description

Modern wine technologies aim for selecting and optimizing the applied technological procedures, including the technical reinsurance of individual operations. One of the key operations, within the wine industry, with a direct impact on the quality of the produced wine is the process of grape pressing. The purpose of pressing is to separate the mold from the processed product by using pressure. The pressing efficiency, exerted by molding, is influenced by the particular type of the pressing device, the varietal properties affecting the consistency of the molded material, the pre-compaction process (crushing, maceration), the thickness of the mold and the number of the pressing cycles. This paper focuses on evaluation of the mechanical horizontal press WOTTLE RS 800 and the pneumatic press ŠKRLJ PST 80, with a volume of 800 litres pressing bins, that were evaluated during the period 2015-2017, while pressing the Sauvignon Blanc and Zweigeltrebe grape varieties. During the evaluation, the main focus was on monitoring the process of pressing, the change of the pressing pressure and its maximum achieved value, the average molding and the performance of the pressers. The results obtained show that, when pressing grapes by a mechanical press, the maximum pressure values are 0.51 MPa while the molding is in the range of 0.748-0.858 depending on the variety. For the pneumatic press, the maximum pressing pressure was 0.15 MPa and the mold variation was between 0.803-0.865. The mechanical press performance of the Sauvignon Blanc variety was 268 l.h-1, 445 l.h-1 for the pneumatic press. For the Zweigeltrebe variety, the performance of the mechanical press varied at 715 l.h-1 and of the pneumatic press at 713 l.h-1. The results of the evaluation illustrate the differences arising from the used press and have practical use in wine-making practice and in designing the technological equipment of the wine-growing operations. At the same time, they can serve as inputs when calculating wine production costs.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

40500 - Other agricultural sciences

Project

—

Continuities

O - Projekt operacniho programu

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Engineering for Rural Development: Proceedings of 18th International Scientific Conference

ISBN

—

ISSN

1691-3043

e-ISSN

1691-5976

Number of pages

6

Pages from-to

570-575

Publisher name

Latvia University of Life Sciences and Technologies

Place of publication

Jelgava

Event location

Jelgava

Event date

May 22, 2019

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000482103500085