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Orientador(es)
Resumo(s)
Composting is one of the best organic waste management techniques, with zero waste;
however, it generates environmental impacts. The objective of this study was to evaluate the emission
of NH3, N2O, CO2, and CH4 from the composting of olive, elderberry, and grape agro-food waste.
The experiment was carried out using reactors receiving straw as control and three treatments
receiving mixtures of straw and olive, elderberry, or grape wastes. The gas emissions were measured
for 150 days, and the composition of the mixtures and composts was determined. The results showed
NH3 and CH4 emissions were reduced by 48% and 29% by the Olive and Elderberry treatments,
while only NH3 loss was reduced by 24% by the Grape treatment. Nitrous oxide, CO2, and GWP
emissions were reduced by 46%, 32%, and 34% by the Olive treatment, while these losses were not
reduced by the Elderberry or Grape treatments. It can be concluded olive waste can effectively reduce
NH3 and GWP, while elderberry and grape wastes are also effective in reducing NH3, but not GWP.
Thus, the addition of agro-food waste appears to be a promising mitigation strategy to reduce gaseous
losses from the composting process.
Descrição
Palavras-chave
composts waste management elderberry waste gaseous emission grape waste olive waste