A new life for winemaking lees: from waste to photovoltaics

Manuel Meneghetti, DSMN, Università Ca’ Foscari Venezia

A new life for winemaking lees: from waste to photovoltaics

The sun, the main natural resource of our planet, has been studied in recent years optimizing materials, technologies and processes to obtain electrical energy thanks to the best renewable and clean source: the solar energy.

Photovoltaic cells are devices able to carry out this conversion and technologies based on the use of organic materials are raising interest, since they could be a viable alternative to traditional systems based on silicon. The most promising are the dye sensitized solar cells (DSSC), which mimic the chlorophyll photosynthesis process.

One of the most important cells’ elements is the dye, which absorbs sunlight and injects electrons in a semiconductor on which it is adsorbed, generally titania, a non-toxic and low-cost oxide.

The present work aims to enhance, through innovative solutions, the main waste product of the vinification processes of red and white grapes, in particular lees and marc, for the realization of DSSC cells.

Using different synthetic approaches, a nanostructured titania with high surface area and ordered porosity was prepared and low molecular weight tannins and anthocyanins extracted from by-products of winemaking were adsorbed on its surface. Tests were carried out on solar cell prototypes to evaluate power and photocurrent generated under simulated solar light irradiation. The use of polyphenolic compounds as dyes for photovoltaic cells can represent an extremely eco-friendly and low environmental impact solution for the production of electric energy, transforming an agri-food waste into a resource and improving the environmental index of wineries.

Article based on the paper presented at the SIVE OENOPPIA Awards (12th edition of Enoforum; Vicenza, Italy, May 21-23, 2019).

Published on 09/09/2020
Related sheets
    E. Aguera, J.M. Sablayrolles
    The seasonal character of harvests limits winemaking considerably, especially oenological research. Thus, conserving sterile musts during the whole year to carry out experiments is certainly a very...
    Published on:08/10/2005
    A new device for stabilisation of white wines throughout a continous flow system
    Parpinello, G.P., Ricci, A., Serantoni, M., Balducci, A., Ragni, L., Versari, A.; University of Bologna, Italy
    Proteins occurring in wine originate from several sources during the winemaking process. Protein content in wines ranges from traces up to hundreds of mg/L, and may cause physical instability in wh...
    Published on:01/15/2020
    A novel electrochemical approach for rapid analysis of white grapes polyphenols and monitoring of pre-fermentative operations
    M. UGLIANO, J. WIRTH, S. BÉGRAND, J. B. DIÉVAL, C. PASCAL, S. VIDAL; Università degli Studi di Verona - Vinventions, Francia
    The ability to rapidly quantify and characterize phenolic composition of grapes and must is critical in the optimization of winemaking practices. In the case of white wine production, measurement o...
    Published on:05/02/2019
    Aurélie Lagorce-Tachon et al. J. Agric. Food Chem., 2016, 64 (35), pp 6672–6675
    The transfer of oxygen through a corked bottleneck was investigated using a manometric technique. First, the effect of cork compression on oxygen transfer was evaluated without considering the glas...
    Published on:12/22/2016
    An electrochemical method for real time measurement of polyphenols during winemaking
    By Christine Pascal, Nelly Champeau, Jean Baptiste Diéval, Stéphane Vidal; Vinventions, Enology team, France
    Polyphenols are known to play a major role in must oxidation as well as in wine aging and oxidation. However, they are difficult to measure in the cellar due to lack of adequate technology. Therefo...
    Published on:02/03/2020
    Application of unconventional tannins as markers of authenticity
    E. Longo, F. Rossetti, V. Merkyte, M. Jourdes, P.L. Teissedre and E. Boselli; Univ. of Bolzano, Univ. Politec. delle Marche-Italy, ISVV-France
    This work aimed at the identification of novel macro-cyclic ‘crown’ prodelphinidins (c-PD) in 19 PDO wines from South Tyrol (vintage 2016) obtained from several regional (Lagrein and Vernatsch/Schi...
    Published on:10/21/2020
© All Right Reserved
ISSN 1826-1590 VAT: IT01286830334
powered by Infonet Srl Piacenza
Privacy Policy
This website and its related third-party services make use of cookies necessary for the purposes described in the cookie policy. If you want to learn more about cookies or how to disable them (either totally or partially), please see the cookie policy. By closing this banner, scrolling through this page, clicking on a link or continuing navigation in any other way, you consent to the use of cookies.
More informationOK

- A +
ExecTime : 1,375