Article
Version 1
Preserved in Portico This version is not peer-reviewed
Composting Waste From the White Wine Industry
Version 1
: Received: 13 January 2023 / Approved: 17 January 2023 / Online: 17 January 2023 (10:46:34 CET)
A peer-reviewed article of this Preprint also exists.
Pinto, R.; Correia, C.; Mourão, I.; Moura, L.; Brito, L.M. Composting Waste from the White Wine Industry. Sustainability 2023, 15, 3454. Pinto, R.; Correia, C.; Mourão, I.; Moura, L.; Brito, L.M. Composting Waste from the White Wine Industry. Sustainability 2023, 15, 3454.
Abstract
The white wine industry generates a large amount of wastes and composting is an alternative for recycling these residues with agronomic and environmental advantages. With this aim, grape marc and grape stalks were composted in static and turned piles, with 3 and 6 turns, to investigate the effects of pile conditions during composting in order to improve final compost quality. Thermophilic temperatures were attained soon after pile construction, and the highest maximum temperatures were achieved in the turned piles (70.5-71.8 ºC). However, pile moisture content decreased bellow recommended values after day 42 in these piles. The extremely high temperatures and low moisture content in turned piles hampered OM mineralization rates and the amount of potentially mineralizable organic matter (OM0) (391-407 g kg-1), whereas the structure of the static pile provided adequate porosity to increase OM decomposition and OM0 (568 g kg-1). This study shows that composting grape marc with stalks, for a period of 140 days, resulted in stabilized and matured compost (NH4+-N / NO3--N <0.5), with good chemical characteristics for application as soil organic amendment in vineyards, without the need for rewetting or turning the piles, thus reducing the agronomic, and environmental cost of the composting process.
Keywords
compost quality; grape marc; grape stalks; organic matter mineralization
Subject
Biology and Life Sciences, Agricultural Science and Agronomy
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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