Impacts of Winemaking Methods on Wastewaters and their Treatment
Abstract
The volume, composition and organic load of wastewaters from five wineries producing white, rosé and red wines bythermovinification, as well as traditionally vinified red wines (75 000 hL to 240 000 hL wine), were studied in terms
of the vinification methods used. Liquid-phase vinifications (white, rosé, thermovinification) produce wastewaters
rich in sugars: 70% of the chemical oxygen demand (COD) when the must is treated, and flows depend on the
daily supply of grapes, representing 40 to 46% of the annual volume of wastewaters during the first month of
activity (September). In contrast, solid-phase vinifications do not produce large quantities of waste at harvest, and
wastewaters produced mainly during devatting are characterised by a predominance of ethanol (≤ 75% COD) and
by staggered flows towards the second month (October), which are less intense (26.7 to 33.6%) and more spread out.
The specific pollution coefficients of liquid-phase vinifications (5.18 to 6.04 kg COD/t grapes) are greater than those
of solid-phase vinifications (3.82 kg COD/t grapes). The higher the winery’s liquid-phase vinification rate, the more
the maximal monthly volume of waste will be intense and early. These results should contribute to the improved
design and management of winery wastewater treatments.
Downloads
A copyright form will be e-mailed to the corresponding author when the manuscript has been accepted for publication.
In principle, the Author agrees to the following when he/she signes the copyright agreement:
I hereby assign to the SOUTH AFRICAN SOCIETY FOR ENOLOGY AND VITICULTURE (SASEV) the copyright of the text, tables, figures, supplementary material, illustrations and other information (the Material) submitted with the manuscript to be published in SOUTH AFRICAN JOURNAL OF ENOLOGY AND VITICULTURE (SAJEV) (the "Article"). The copyright becomes effective from the date the Article has been accepted for publication in SAJEV.
This is an open access journal, and the authors and journal should be properly acknowledged, when works are cited.
Author's may use the publishers version for teaching purposes, in books, theses, dissertations, conferences and conference papers.
A copy of the authors' publishers version may also be hosted on the following websites:
- Non-commercial personal webpage or blog.
- Institutional webpage.
- Authors Institutional Repository.
The following notice should accompany such a posting on the website: This is an electronic version of an article published in SAJEV, Volume XXX, number XXX, pages XXX - XXX, DOI. Authors should also supply a hyperlink to the original paper or indicate where the original paper (www.journals.ac.za/index.php/sajev/) may be found.
Authors publishers version, affiliated with the Stellenbosch University will be automatically deposited in the University's Institutional Repository SUNScholar.
Articles as a whole, may not be re-published with another journal.
The following license applies:
Attribution CC BY-NC-ND 4.0